{"id":23491,"date":"2025-11-13T09:15:25","date_gmt":"2025-11-13T09:15:25","guid":{"rendered":"https:\/\/pokecon.jp\/job\/?p=23491"},"modified":"2025-11-13T09:15:25","modified_gmt":"2025-11-13T09:15:25","slug":"ruby%e3%81%aehash%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bsymbol%e3%82%ad%e3%83%bc%e3%81%a8string%e3%82%ad%e3%83%bc%e3%81%ae%e9%81%95%e3%81%84%e3%82%92%e5%ad%a6%e3%81%b3%e7%9b%b4%e3%81%97%e3%81%9f%e8%a9%b1","status":"publish","type":"post","link":"https:\/\/pokecon.jp\/job\/23491\/","title":{"rendered":"Ruby\u306eHash\u306b\u304a\u3051\u308bSymbol\u30ad\u30fc\u3068String\u30ad\u30fc\u306e\u9055\u3044\u3092\u5b66\u3073\u76f4\u3057\u305f\u8a71 | Wantedly Engineer Blog"},"content":{"rendered":"\n<br \/><img decoding=\"async\" src=\"https:\/\/www.wantedly.com\/post_articles\/1022016\/ogp_image\" \/><\/p>\n<div>\n<p><span>\u3053\u3093\u306b\u3061\u306f\u3002\u30a6\u30a9\u30f3\u30c6\u30c3\u30c9\u30ea\u30fc\u3067\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u3057\u3066\u3044\u308b\u5c0f\u5ba4 (<\/span><a target=\"_blank\" href=\"https:\/\/x.com\/nekorush14\" target=\"_blank\" rel=\"nofollow noopener\"><span>@nekorush14<\/span><\/a><span>) \u3067\u3059\u30025\u5e74\u3076\u308a\u306b\u89e6\u308c\u305fRuby\u3067\u8a70\u307e\u3063\u305f\u3068\u3053\u308d\u3092\u6539\u3081\u3066\u5b66\u3073\u76f4\u3057\u305f\u8a71\u3092\u3057\u307e\u3059\u3002\u4eca\u56de\u306fHash\u306eSymbol\u30ad\u30fc\u3068String\u30ad\u30fc\u306e\u9055\u3044\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3059\u3002<\/span><\/p>\n<div class=\"article-table-of-contents\">\n<div class=\"container is-opened\">\n<p><h2 class=\"title\">\u76ee\u6b21<\/h2>\n<p><button class=\"accordion-button is-opened\"><i class=\"wt-icon wt-icon-chevron-up\"\/><\/button><\/p>\n<div class=\"dynamic-height-wrapper\">\n<ul class=\"ulist\">\n<li class=\"list-item item-h2\">\n<p class=\"item-text\">\u306f\u3058\u3081\u306b<\/p>\n<\/li>\n<li class=\"list-item item-h2\">\n<p class=\"item-text\">:example_key\u3068&#8221;example_key&#8221;\u306e\u9055\u3044<\/p>\n<\/li>\n<li class=\"list-item item-h3\">\n<p class=\"item-text\">Symbol\u306f\u5e38\u306b\u4e00\u610f\u306e\u8b58\u5225\u5b50<\/p>\n<\/li>\n<li class=\"list-item item-h3\">\n<p class=\"item-text\">String\u306f\u6bce\u56de\u751f\u6210\u3055\u308c\u3046\u308b\u30c7\u30fc\u30bf<\/p>\n<\/li>\n<li class=\"list-item item-h2\">\n<p class=\"item-text\">\u306a\u305cSymbol\u30ad\u30fc\u304c\u4f7f\u308f\u308c\u308b\u306e\u304b<\/p>\n<\/li>\n<li class=\"list-item item-h3\">\n<p class=\"item-text\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u512a\u4f4d\u6027<\/p>\n<\/li>\n<li class=\"list-item item-h3\">\n<p class=\"item-text\">\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9(\u610f\u5473\u8ad6) \u7684\u306a\u4f7f\u3044\u5206\u3051<\/p>\n<\/li>\n<li class=\"list-item item-h2\">\n<p class=\"item-text\">Rails\u3067\u767a\u751f\u3055\u305b\u305fnil\u30d0\u30b0\u3068\u305d\u306e\u5bfe\u51e6\u6cd5<\/p>\n<\/li>\n<li class=\"list-item item-h3\">\n<p class=\"item-text\">\u5bfe\u51e6\u6cd5<\/p>\n<\/li>\n<li class=\"list-item item-h2\">\n<p class=\"item-text\">\u307e\u3068\u3081<\/p>\n<\/li>\n<li class=\"list-item item-h2\">\n<p class=\"item-text\">\u53c2\u8003\u6587\u732e<\/p>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<h2><span>\u306f\u3058\u3081\u306b<\/span><\/h2>\n<p><span>\u30a6\u30a9\u30f3\u30c6\u30c3\u30c9\u30ea\u30fc\u3078\u5165\u793e\u3057\u30015\u5e74\u3076\u308a\u306bRuby\u306e\u4e16\u754c\u306b\u623b\u3063\u3066\u304d\u307e\u3057\u305f\u304c\u3001Symbol\u306e\u6271\u3044\u65b9\u3084\u6b63\u3057\u3044\u8003\u3048\u65b9\u3092\u5fd8\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u30bd\u30fc\u30b9\u4e0a\u3067Hash\u3092\u4f7f\u3046\u6a5f\u4f1a\u304c\u3042\u308a\u3001\u305d\u306e\u6642\u70b9\u3067\u306f\u300cRuby\u3060\u304b\u3089Hash\u304b\u3089\u30c7\u30fc\u30bf\u3092\u62bd\u51fa\u3059\u308b\u305f\u3081\u306e\u30ad\u30fc\u306fSymbol\u306b\u3057\u3066\u304a\u3051\u3070\u3001\u3088\u3057\u306a\u306b\u3084\u3063\u3066\u304f\u308c\u308b\u306f\u305a\u3060\u300d\u3068\u3044\u3046\u8003\u3048\u3067\u3044\u307e\u3057\u305f\u3002<\/span><br \/><span>\u5b9f\u969b\u306b\u3001\u6a5f\u80fd\u958b\u767a\u3092\u884c\u3046\u4e2d\u3067\u5916\u90e8API\u304b\u3089\u306eJSON\u30ec\u30b9\u30dd\u30f3\u30b9\u3092Hash\u3068\u3057\u3066\u5185\u90e8\u3067\u6271\u304a\u3046\u3068\u3057\u3066\u3044\u305f\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u3044\u3066\u3044\u307e\u3057\u305f\u3002<\/span><\/p>\n<pre class=\"language-ruby\" tabindex=\"0\"><code class=\"language-ruby\"><br\/><span>parsed_data <\/span><span class=\"token operator\">=<\/span><span> <\/span><span class=\"token constant\">JSON<\/span><span class=\"token punctuation\">.<\/span><span>parse<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">'{\"example_key\": \"example_value\"}'<\/span><span class=\"token punctuation\">)<\/span><p><br\/><span class=\"token keyword\">if<\/span><span> parsed_data<\/span><span class=\"token punctuation\">[<\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span>present<\/span><span class=\"token operator\">?<\/span><br\/><span>  puts <\/span><span class=\"token string\">\"response can use!\"<\/span><br\/><span class=\"token keyword\">else<\/span><br\/><span>  puts <\/span><span class=\"token string\">\"no response exists.\"<\/span><span> <\/span><br\/><span class=\"token keyword\">end<\/span><\/p><\/code><\/pre>\n<p><span>Rails\u3092\u66f8\u3044\u3066\u3044\u305f\u9803\u306f <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">params[:example_key]<\/span><\/code><span> \u306e\u3088\u3046\u306bSymbol\u30ad\u30fc\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306e\u304c\u5f53\u305f\u308a\u524d\u3060\u3068\u601d\u3063\u3066\u3044\u305f\u306e\u306b\u3001\u306a\u305c <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">parsed_data[:example_key].present?<\/span><\/code><span> \u304c<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">false<\/span><\/code><span> (<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">parsed_data[:example_key]<\/span><\/code><span>\u304c<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">nil<\/span><\/code><span>\u3067\u3042\u308b<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">)<\/span><\/code><span> \u3068\u306a\u308b\u306e\u304b\u7406\u89e3\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u307e\u305f\u3001\u5fa9\u5e30\u76f4\u5f8c\u306e\u79c1\u306f\u300c<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">:example_key<\/span><\/code><span> \u306f\u5909\u6570\uff1f\u3067\u3082\u5ba3\u8a00\u3057\u3066\u306a\u3044\u306e\u306b\u306a\u3093\u3067\u4f7f\u3048\u308b\u3060\u3063\u3051\u2026\uff1f\u300d\u3068\u3001Symbol\u306e\u6982\u5ff5\u81ea\u4f53\u304c\u66d6\u6627\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u306b\u6c17\u3065\u304d\u307e\u3057\u305f\u3002<\/span><\/p>\n<p><span>\u672c\u7a3f\u3067\u306f\u3001Hash\u306e\u8aa4\u3063\u305f\u30ad\u30fc\u306e\u578b\u306b\u3088\u308b<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">nil\u30d0\u30b0\u3092\u304d\u3063\u304b\u3051\u306b\u5b66\u3073\u76f4\u3057\u305f\u3001Ruby\u306b\u304a\u3051\u308bSymbol\u30ad\u30fc\u3068String\u30ad\u30fc\u306e\u6839\u672c\u7684\u306a\u9055\u3044\u3068\u3001Rails\u958b\u767a\u306b\u304a\u3051\u308b\u300c\u843d\u3068\u3057\u7a74\u300d\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/span><\/code><\/p>\n<h2><code><span style=\"font-family: monospace; word-wrap: break-word;\">:example_key<\/span><\/code><span>\u3068<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">\"example_key<\/span><\/code><span>&#8220;\u306e\u9055\u3044<\/span><\/h2>\n<p><span>Ruby\u306b\u304a\u3051\u308bHash\u3067\u306f\u3001Symbol\u30ad\u30fc(<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">:example_key<\/span><\/code><span>)\u3068String\u30ad\u30fc(<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">\"example_key\"<\/span><\/code><span>)\u3092\u5168\u304f\u7570\u306a\u308b\u30ad\u30fc\u3068\u3057\u3066\u6271\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001Ruby\u306e\u5185\u90e8\u3067Symbol\u3068String\u304c\u6839\u672c\u7684\u306b\u7570\u306a\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u305f\u3081\u3067\u3059\u3002<\/span><\/p>\n<h3><span>Symbol\u306f\u5e38\u306b\u4e00\u610f\u306e\u8b58\u5225\u5b50<\/span><\/h3>\n<p><span>Symbol\u306f <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">:<\/span><\/code><span> \u304b\u3089\u59cb\u307e\u308b\u8a18\u6cd5(\u4f8b: <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">:name<\/span><\/code><span>)\u3067\u8868\u3055\u308c\u307e\u3059\u3002<\/span><\/p>\n<p><span>\u6700\u5927\u306e\u7279\u5fb4\u306f\u3001\u300c\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb(\u5909\u66f4\u4e0d\u53ef)\u3067\u3042\u308a\u3001\u304b\u3064Ruby\u306e\u5b9f\u884c\u74b0\u5883\u5168\u4f53\u3067\u5e38\u306b\u540c\u4e00\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308b\u300d\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306f\u300c\u8b58\u5225\u5b50(Identifier)\u300d\u3084\u300c\u540d\u524d\u300d\u3068\u3057\u3066\u306e\u5f79\u5272\u3092\u62c5\u3046\u305f\u3081\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<p><code><span style=\"font-family: monospace; word-wrap: break-word;\">object_id<\/span><\/code><span> (\u30e1\u30e2\u30ea\u4e0a\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u793a\u3059\u3088\u3046\u306a\u3082\u306e) \u78ba\u8a8d\u3059\u308b\u3068\u7406\u89e3\u3057\u3084\u3059\u3044\u3067\u3059\u3002<\/span><\/p>\n<pre class=\"language-ruby\" tabindex=\"0\"><code class=\"language-ruby\"><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">001<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> <\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token punctuation\">.<\/span><span>object_id<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token number\">30674908<\/span><br\/><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">002<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> <\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token punctuation\">.<\/span><span>object_id <\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token number\">30674908<\/span><\/code><\/pre>\n<p><span>\u307e\u305f\u3001\u3088\u304f\u898b\u308b\u3068\u7279\u306b<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">example_key\u3092\u5ba3\u8a00\u305b\u305a\u306b\u4f7f\u7528\u3067\u304d\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u660e\u3089\u304b\u306b\u5909\u6570\u3067\u306f\u306a\u3044\u3053\u3068\u3092\u793a\u3057\u3066\u304a\u308a\u3001\u3053\u308c\u81ea\u4f53\u304c:example_key\u3068\u3044\u3046\u540d\u524d\u3092\u793a\u3059\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308b\u3068\u3044\u3048\u307e\u3059\u3002<\/span><\/code><\/p>\n<h3><span>String\u306f\u6bce\u56de\u751f\u6210\u3055\u308c\u3046\u308b\u30c7\u30fc\u30bf<\/span><\/h3>\n<p><span>String\u306f\u3001<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">\"<\/span><\/code><span>(\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c8)\u3084 <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">''<\/span><\/code><span>(\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8)\u3067\u56f2\u307e\u308c\u305f\u300c\u30c7\u30fc\u30bf\u300d\u3067\u3059\u3002<\/span><\/p>\n<p><span>\u91cd\u8981\u306a\u7279\u5fb4\u306f\u3001\u300c\u30df\u30e5\u30fc\u30bf\u30d6\u30eb (\u5909\u66f4\u53ef\u80fd) \u3067\u3042\u308a\u3001\u304b\u3064 (<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">frozen_string_literal<\/span><\/code><span> \u304c\u6709\u52b9\u3067\u306a\u3044\u9650\u308a) \u66f8\u304b\u308c\u308b\u305f\u3073\u306b\u65b0\u3057\u3044\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u30e1\u30e2\u30ea\u4e0a\u306b\u751f\u6210\u3055\u308c\u308b\u300d\u3053\u3068\u3067\u3059\u3002<\/span><\/p>\n<pre class=\"language-ruby\" tabindex=\"0\"><code class=\"language-ruby\"><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">001<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> <\/span><span class=\"token string\">\"example_key\"<\/span><span class=\"token punctuation\">.<\/span><span>object_id<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token number\">98620<\/span><br\/><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">002<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> <\/span><span class=\"token string\">\"example_key\"<\/span><span class=\"token punctuation\">.<\/span><span>object_id <\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token number\">101080<\/span><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">003<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> example_string_key <\/span><span class=\"token operator\">=<\/span><span> <\/span><span class=\"token string\">\"example_key\"<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token string\">\"example_key\"<\/span><br\/><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">004<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> example_string_key<\/span><span class=\"token punctuation\">.<\/span><span>upcase<\/span><span class=\"token operator\">!<\/span><span> <\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token string\">\"EXAMPLE_KEY\"<\/span><\/p><p><br\/><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">005<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> <\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token punctuation\">.<\/span><span>upcase<\/span><span class=\"token operator\">!<\/span><br\/><span class=\"token punctuation\">(<\/span><span>irb<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">5<\/span><span class=\"token symbol\">:in<\/span><span> <\/span><span class=\"token command\">`<main>': undefined method `<\/main><\/span><span>upcase<\/span><span class=\"token operator\">!<\/span><span>' <\/span><span class=\"token keyword\">for<\/span><span> an instance of <\/span><span class=\"token builtin\">Symbol<\/span><span> <\/span><span class=\"token punctuation\">(<\/span><span>NoMethodError<\/span><span class=\"token punctuation\">)<\/span><br\/><span>Did you mean<\/span><span class=\"token operator\">?<\/span><span>  upcase<\/span><\/p><\/code><\/pre>\n<p><span>Ruby\u306eHash\u306f\u30ad\u30fc\u306b\u6307\u5b9a\u3057\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e<\/span><a target=\"_blank\" href=\"https:\/\/docs.ruby-lang.org\/ja\/latest\/method\/Object\/i\/hash.html\" target=\"_blank\" rel=\"nofollow noopener\"><code><span style=\"font-family: monospace; word-wrap: break-word;\">Object#hash\u30e1\u30bd\u30c3\u30c9<\/span><\/code><\/a><span>\u304c\u8fd4\u5374\u3059\u308b\u30cf\u30c3\u30b7\u30e5\u5024\u3068<\/span><a target=\"_blank\" href=\"https:\/\/docs.ruby-lang.org\/ja\/latest\/method\/Object\/i\/eql=3f.html\" target=\"_blank\" rel=\"nofollow noopener\"><code><span style=\"font-family: monospace; word-wrap: break-word;\">Object#eql?<\/span><\/code><span>\u30e1\u30bd\u30c3\u30c9<\/span><\/a><span>\u304c\u8fd4\u5374\u3059\u308b\u540c\u4e00\u6027\u6bd4\u8f03\u306e\u7d50\u679c\u306b\u3088\u308a\u5024\u3092\u7ba1\u7406\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<pre class=\"language-ruby\" tabindex=\"0\"><code class=\"language-ruby\"><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">001<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> <\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token punctuation\">.<\/span><span>hash<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token number\">363044077936704442<\/span><span> <\/span><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">002<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> <\/span><span class=\"token string\">\"example_key\"<\/span><span class=\"token punctuation\">.<\/span><span>hash<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token operator\">-<\/span><span class=\"token number\">4420574026112658298<\/span><span> <\/span><\/p><p><br\/><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">003<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> <\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token punctuation\">.<\/span><span>eql<\/span><span class=\"token operator\">?<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"example_key\"<\/span><span class=\"token punctuation\">)<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token boolean\">false<\/span><br\/><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">004<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> <\/span><span class=\"token string\">\"example_key\"<\/span><span class=\"token punctuation\">.<\/span><span>eql<\/span><span class=\"token operator\">?<\/span><span class=\"token punctuation\">(<\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token punctuation\">)<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token boolean\">false<\/span><\/p><\/code><\/pre>\n<p><code><span style=\"font-family: monospace; word-wrap: break-word;\">:example_key\u3068\"example_key\"\u3067<\/span><\/code><span>\u306f<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">\u30cf\u30c3\u30b7\u30e5<\/span><\/code><span>\u5024\u304c\u7570\u306a\u308b\u305f\u3081\u3001Hash\u306f\u3053\u308c\u3089\u3092\u5b8c\u5168\u306b\u5225\u7269\u3068\u3057\u3066\u6271\u3044\u307e\u3059\u3002\u4eee\u306b\u30cf\u30c3\u30b7\u30e5\u5024\u304c\u540c\u4e00\u3067\u3042\u308c\u3070\u3001<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">Object#eql?<\/span><\/code><span>\u30e1\u30bd\u30c3\u30c9\u304c\u8fd4\u5374\u3059\u308b\u7d50\u679c\u306b\u3088\u308a\u540c\u4e00\u306e\u30ad\u30fc\u3067\u3042\u308b\u304b\u3092\u5224\u5b9a\u3057\u307e\u3059\u3002<\/span><\/p>\n<h2><span>\u306a\u305cSymbol\u30ad\u30fc\u304c\u4f7f\u308f\u308c\u308b\u306e\u304b<\/span><\/h2>\n<p><span>\u3067\u306f\u3001\u306a\u305cRuby (\u7279\u306bRails) \u306b\u304a\u3044\u3066Hash\u306e\u30ad\u30fc\u3068\u3057\u3066Symbol\u304c\u597d\u307e\u308c\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u4e3b\u306b\u5f8c\u8ff0\u3059\u308b2\u3064\u306e\u7406\u7531\u304c\u3042\u308b\u3068\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/span><\/p>\n<h3><span>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u512a\u4f4d\u6027<\/span><\/h3>\n<p><span>\u304b\u3064\u3066\u306eRuby (\u7279\u306b2.1\u4ee5\u524d) \u3067\u306f\u3001<\/span><a target=\"_blank\" href=\"https:\/\/blog.thnkandgrow.com\/the-hidden-power-of-symbols-in-ruby-when-to-use-symbols-instead-of-strings\/\" target=\"_blank\" rel=\"nofollow noopener\"><span>\u30e1\u30e2\u30ea\u52b9\u7387\u3068\u6bd4\u8f03\u901f\u5ea6\u306e\u89b3\u70b9\u3067Symbol\u306b\u5927\u304d\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4e0a\u306e\u5229\u70b9\u304c\u3042\u308a\u307e\u3057\u305f<\/span><\/a><span>\u3002String\u30ad\u30fc\u3092\u591a\u7528\u3059\u308b\u3068\u3001\u540c\u3058 <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">\"name\"<\/span><\/code><span> \u3067\u3082\u90fd\u5ea6\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u751f\u6210\u3055\u308c\u30e1\u30e2\u30ea\u3092\u6d88\u8cbb\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u4e00\u65b9\u3067Symbol\u306f\u5e38\u306b\u4e00\u610f\u3067\u3042\u308b\u305f\u3081\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u304c\u5727\u5012\u7684\u306b\u826f\u597d\u3067\u3057\u305f\u3002\u307e\u305f\u3001\u6bd4\u8f03\u901f\u5ea6\u306b\u3064\u3044\u3066\u306fHash\u304c\u30ad\u30fc\u3092\u6bd4\u8f03\u3059\u308b\u969b\u3001String\u306f\u6587\u5b57\u5217\u5168\u4f53\u3092\u6bd4\u8f03\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304c\u3001Symbol\u306f <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">object_id<\/span><\/code><span> (\u6574\u6570) \u3092\u6bd4\u8f03\u3059\u308b\u3060\u3051\u3067\u6e08\u3080\u305f\u3081\u3001\u975e\u5e38\u306b\u9ad8\u901f\u3067\u3057\u305f\u3002<\/span><\/p>\n<p><span>\u203b \u73fe\u4ee3\u306eRuby\u3001\u7279\u306b<\/span><a target=\"_blank\" href=\"https:\/\/www.ruby-lang.org\/ja\/news\/2014\/12\/25\/ruby-2-2-0-released\/\" target=\"_blank\" rel=\"nofollow noopener\"><span>2.2.0\u3067Symbol GC (\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3)\u304c\u5c0e\u5165<\/span><\/a><span>\u3055\u308c\u3066\u4ee5\u964d\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u306e\u5dee\u306f\u7e2e\u307e\u3063\u3066\u3044\u307e\u3059\u3002\u307e\u305fString\u81ea\u4f53\u306e\u6700\u9069\u5316\u3082\u9032\u3093\u3067\u304a\u308a\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5dee\u306f\u304b\u3064\u3066\u307b\u3069\u7d76\u5bfe\u7684\u306a\u3082\u306e\u3067\u306f\u306a\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<h3><span>\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9(\u610f\u5473\u8ad6) \u7684\u306a\u4f7f\u3044\u5206\u3051<\/span><\/h3>\n<p><span>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5dee\u304c\u7e2e\u307e\u3063\u305f\u73fe\u4ee3\u306b\u304a\u3044\u3066\u3001\u3088\u308a\u91cd\u8981\u306a\u306e\u304c\u300c\u610f\u5473\u8ad6 (\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9\uff09\u300d\u7684\u306a\u4f7f\u3044\u5206\u3051\u3067\u3059\u3002String\u306f\u300c\u30e6\u30fc\u30b6\u30fc\u304c\u5165\u529b\u3057\u305f\u540d\u524d\u300d\u300c\u8a18\u4e8b\u306e\u672c\u6587\u300d\u306a\u3069\u3001\u300c\u5185\u5bb9\u304c\u5909\u308f\u308a\u3046\u308b\u3001\u3042\u308b\u3044\u306f\u5916\u90e8\u304b\u3089\u6765\u308b\u30c7\u30fc\u30bf\u300d\u3092\u610f\u5473\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002\u4e00\u65b9\u3067\u3001Symbol\u306f \u300c<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">user<\/span><\/code><span>\u306e<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">name<\/span><\/code><span>\u5c5e\u6027\u300d\u300c\u30e1\u30bd\u30c3\u30c9\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u540d (<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">:class<\/span><\/code><span>\u3084<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">:method<\/span><\/code><span>)\u300d\u306a\u3069\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u4e0a\u3067\u306e\u300c\u8b58\u5225\u5b50\u300d\u3084\u300c\u540d\u524d\u300d\u3068\u3057\u3066\u306e\u5f79\u5272\u3067\u4f7f\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/span><\/p>\n<p><span>Hash\u306e\u30ad\u30fc\u306f\u3001\u591a\u304f\u306e\u5834\u5408\u300c\u30c7\u30fc\u30bf\u3092\u6307\u3059\u305f\u3081\u306e\u8b58\u5225\u5b50\u300d\u3068\u3057\u3066\u4f7f\u308f\u308c\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">{ user_id: 1 }<\/span><\/code><span> \u3068\u3044\u3046\u8a18\u6cd5\u306f\u300c<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">:user_id<\/span><\/code><span>\u3068\u3044\u3046\u540d\u524d (\u8b58\u5225\u5b50)\u3067 <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">1<\/span><\/code><span> \u3068\u3044\u3046\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3059\u308b\u300d\u3053\u3068\u3092\u610f\u5473\u3057\u3001Symbol\u306e\u5f79\u5272\u3068\u5b8c\u5168\u306b\u4e00\u81f4\u3057\u307e\u3059\u3002<\/span><\/p>\n<h2><span>Rails\u3067\u767a\u751f\u3055\u305b\u305fnil\u30d0\u30b0\u3068\u305d\u306e\u5bfe\u51e6\u6cd5<\/span><\/h2>\n<p><span>\u3053\u3053\u307e\u3067\u306e\u8a71\u3092\u8e0f\u307e\u3048\u3066\u3001\u5192\u982d\u306e <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">nil<\/span><\/code><span> \u30d0\u30b0\u306e\u8a71\u306b\u623b\u308a\u307e\u3059\u3002<\/span><br \/><span>\u300c\u3067\u3082\u3001Rails\u3067\u306f <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">params[:id]<\/span><\/code><span> \u3067\u666e\u901a\u306b\u52d5\u304f\u3058\u3083\u306a\u3044\u304b\ud83e\udd14\u300d\u3068\u601d\u308f\u308c\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u3067\u3059\u304c\u3001\u3053\u308c\u306f\u521d\u5b66\u8005\u3084\u5fa9\u5e30\u8005\u3092\u6df7\u4e71\u3055\u305b\u308b\u5143\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002Rails\u306e <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">params<\/span><\/code><span> \u306f\u3001\u7d20\u306eHash\u3067\u306f\u306a\u304f<\/span><a target=\"_blank\" href=\"https:\/\/api.rubyonrails.org\/classes\/ActiveSupport\/HashWithIndifferentAccess.html\" target=\"_blank\" rel=\"nofollow noopener\"><code><span style=\"font-family: monospace; word-wrap: break-word;\">ActiveSupport::HashWithIndifferentAccess<\/span><\/code><span>\u30af\u30e9\u30b9<\/span><\/a><span>\u3067Hash\u304c\u30e9\u30c3\u30d7\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u300cSymbol\u30ad\u30fc\u3068String\u30ad\u30fc\u3092\u533a\u5225\u3057\u306a\u3044 (Indifferent\u3067\u3042\u308b)\u300dHash\u3067\u3059\u3002<\/span><\/p>\n<pre class=\"language-ruby\" tabindex=\"0\"><code class=\"language-ruby\"><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">001<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> params <\/span><span class=\"token operator\">=<\/span><span> ActiveSupport<\/span><span class=\"token double-colon\">::<\/span><span class=\"token class-name\">HashWithIndifferentAccess<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">new<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><p><br\/><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">002<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> params<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">\"example_key\"<\/span><span class=\"token punctuation\">]<\/span><span> <\/span><span class=\"token operator\">=<\/span><span> <\/span><span class=\"token string\">\"example_value\"<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token string\">\"example_value\"<\/span><\/p><p><br\/><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">003<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> params<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">\"example_key\"<\/span><span class=\"token punctuation\">]<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token string\">\"example_value\"<\/span><\/p><p><br\/><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">004<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> params<\/span><span class=\"token punctuation\">[<\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token punctuation\">]<\/span><span> <\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token string\">\"example_value\"<\/span><\/p><\/code><\/pre>\n<p><span>\u3053\u306e\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30ad\u30fc\u306e\u578b\u3092\u610f\u8b58\u305b\u305a\u306b\u958b\u767a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n<p><span>\u4e00\u65b9\u3067\u3001\u7d20\u306eString\u30ad\u30fcHash\u3092\u8fd4\u5374\u3059\u308b<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">JSON.parse<\/span><\/code><span>\u3084\u3001YAML\u306e\u8aad\u307f\u8fbc\u307f\u306a\u3069\u3067\u3001\u300c<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">ActiveSupport::HashWithIndifferentAccess\u3067\u306f\u306a\u3044<\/span><\/code><span>\u7d20\u306eHash\u300d\u3092\u610f\u8b58\u305b\u305a\u6271\u3046\u3068\u3001<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">params<\/span><\/code><span> \u3068\u540c\u3058\u611f\u899a\u3067Symbol\u30ad\u30fc\u3067\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3057\u307e\u3044\u3001<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">nil<\/span><\/code><span> \u30d0\u30b0\u306b\u906d\u9047\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/span><\/p>\n<h3><span>\u5bfe\u51e6\u6cd5<\/span><\/h3>\n<p><span>\u3053\u306e <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">nil<\/span><\/code><span> \u30d0\u30b0\u306b\u906d\u9047\u3057\u305f\u3089\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5bfe\u51e6\u6cd5\u304c\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/span><\/p>\n<p><span>1. <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">with_indifferent_access<\/span><\/code><span> \u3092\u4f7f\u3046 <\/span><br \/><span>Rails\u74b0\u5883\u306e<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">params<\/span><\/code><span>\u3068\u540c\u3058\u6319\u52d5(\u30ad\u30fc\u3092\u533a\u5225\u3057\u306a\u3044)\u3067\u554f\u984c\u306a\u3044\u5834\u5408\u306b\u306f\u6709\u52b9\u306a\u65b9\u6cd5\u3067\u3059\u3002<\/span><\/p>\n<pre class=\"language-ruby\" tabindex=\"0\"><code class=\"language-ruby\"><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">001<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> response_body <\/span><span class=\"token operator\">=<\/span><span> <\/span><span class=\"token string\">'{\"example_key\": \"example_value\"}'<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token string\">\"{\\\"example_key\\\": \\\"example_value\\\"}\"<\/span><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">002<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> parsed_data <\/span><span class=\"token operator\">=<\/span><span> <\/span><span class=\"token constant\">JSON<\/span><span class=\"token punctuation\">.<\/span><span>parse<\/span><span class=\"token punctuation\">(<\/span><span>response_body<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span>with_indifferent_access<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">\"example_key\"<\/span><span class=\"token operator\">=&gt;<\/span><span class=\"token string\">\"example_value\"<\/span><span class=\"token punctuation\">}<\/span><\/p><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">003<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> parsed_data<\/span><span class=\"token punctuation\">[<\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span>present<\/span><span class=\"token operator\">?<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token boolean\">true<\/span><\/p><\/code><\/pre>\n<p><span>2. <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">transform_keys<\/span><\/code><span> \u3092\u4f7f\u3046<\/span><br \/><span>\u30ad\u30fc\u3092Symbol\u306b\u7d71\u4e00\u3059\u308b\u5834\u5408\u3001\u3088\u308a\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002<\/span><\/p>\n<pre class=\"language-ruby\" tabindex=\"0\"><code class=\"language-ruby\"><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">001<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> response_body <\/span><span class=\"token operator\">=<\/span><span> <\/span><span class=\"token string\">'{\"example_key\": \"example_value\"}'<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token string\">\"{\\\"example_key\\\": \\\"example_value\\\"}\"<\/span><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">002<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> parsed_data <\/span><span class=\"token operator\">=<\/span><span> <\/span><span class=\"token constant\">JSON<\/span><span class=\"token punctuation\">.<\/span><span>parse<\/span><span class=\"token punctuation\">(<\/span><span>response_body<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span>transform_keys<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span><span class=\"token symbol\">:to_sym<\/span><span class=\"token punctuation\">)<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token punctuation\">{<\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token operator\">=&gt;<\/span><span class=\"token string\">\"example_value\"<\/span><span class=\"token punctuation\">}<\/span><\/p><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">003<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> parsed_data<\/span><span class=\"token punctuation\">[<\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span>present<\/span><span class=\"token operator\">?<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token boolean\">true<\/span><\/p><\/code><\/pre>\n<p><span>3. <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">deep_symbolize_keys<\/span><\/code><span>\u3092\u4f7f\u3046<\/span><br \/><code><span style=\"font-family: monospace; word-wrap: break-word;\">transform_keys<\/span><\/code><span>\u306f1\u968e\u5c64\u5206\u306e\u30ad\u30fc\u3092Symbol\u306b\u5909\u63db\u3067\u304d\u307e\u3059\u304c\u3001\u30cd\u30b9\u30c8\u3057\u3066\u3044\u308b\u3068\u540c\u4e00\u306e\u4e8b\u8c61\u304c\u767a\u751f\u3057\u307e\u3059\u3002Rails\u74b0\u5883\u5185\u3067\u3042\u308c\u3070<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">deep_symbolize_keys\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001to_sym\u5316\u53ef\u80fd\u306a\u30ad\u30fc\u3092\u30eb\u30fc\u30c8\u304b\u3089\u30cd\u30b9\u30c8\u3057\u305f\u5148\u307e\u3067\u5168\u3066<\/span><\/code><span>Symbol<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">\u5316\u3067\u304d\u307e\u3059\u3002<\/span><\/code><\/p>\n<pre class=\"language-ruby\" tabindex=\"0\"><code class=\"language-ruby\"><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">001<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> nested_example <\/span><span class=\"token operator\">=<\/span><span> '<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">\"example_obj\"<\/span><span class=\"token operator\">:<\/span><span> <\/span><span class=\"token punctuation\">{<\/span><span> <\/span><span class=\"token string\">\"example_key\"<\/span><span class=\"token operator\">:<\/span><span> <\/span><span class=\"token string\">\"example_value\"<\/span><br\/><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">}<\/span><span>'<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token string\">\"{\\\"example_obj\\\": { \\\"example_key\\\": \\\"example_value\\\" }}\"<\/span><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">002<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> parsed_data <\/span><span class=\"token operator\">=<\/span><span> <\/span><span class=\"token constant\">JSON<\/span><span class=\"token punctuation\">.<\/span><span>parse<\/span><span class=\"token punctuation\">(<\/span><span>nested_example<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span>deep_symbolize_keys<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token punctuation\">{<\/span><span class=\"token symbol\">:example_obj<\/span><span class=\"token operator\">=&gt;<\/span><span class=\"token punctuation\">{<\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token operator\">=&gt;<\/span><span class=\"token string\">\"example_value\"<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">}<\/span><\/p><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">003<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> parsed_data<\/span><span class=\"token punctuation\">[<\/span><span class=\"token symbol\">:example_obj<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span>present<\/span><span class=\"token operator\">?<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token boolean\">true<\/span><\/p><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">004<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> parsed_data<\/span><span class=\"token punctuation\">[<\/span><span class=\"token symbol\">:example_obj<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span>present<\/span><span class=\"token operator\">?<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token boolean\">true<\/span><\/p><\/code><\/pre>\n<p><span>4. <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">JSON.parse<\/span><\/code><span>\u306e<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">symbolize_names<\/span><\/code><span>\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4f7f\u3046<\/span><br \/><span>JSON.parse\u30e1\u30bd\u30c3\u30c9\u306b\u306fHash\u30ad\u30fc\u3092Symbol\u306e\u72b6\u614b\u3067\u8fd4\u5374\u3055\u305b\u308b<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">symbolize_names\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/code><\/p>\n<pre class=\"language-ruby\" tabindex=\"0\"><code class=\"language-ruby\"><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">001<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> nested_example <\/span><span class=\"token operator\">=<\/span><span> '<\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">\"example_obj\"<\/span><span class=\"token operator\">:<\/span><span class=\"token punctuation\">{<\/span><span> <\/span><span class=\"token string\">\"example_key\"<\/span><span class=\"token operator\">:<\/span><span> <\/span><span class=\"token string\">\"example_value\"<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">}<\/span><br\/><span>'<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token string\">\"{\\\"example_obj\\\":{ \\\"example_key\\\": \\\"example_value\\\"}}\"<\/span><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">002<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> parsed_data <\/span><span class=\"token operator\">=<\/span><span> <\/span><span class=\"token constant\">JSON<\/span><span class=\"token punctuation\">.<\/span><span>parse<\/span><span class=\"token punctuation\">(<\/span><span>nested_example<\/span><span class=\"token punctuation\">,<\/span><span> <\/span><span class=\"token symbol\">symbolize_names<\/span><span class=\"token operator\">:<\/span><span> <\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token punctuation\">{<\/span><span class=\"token symbol\">:example_obj<\/span><span class=\"token operator\">=&gt;<\/span><span class=\"token punctuation\">{<\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token operator\">=&gt;<\/span><span class=\"token string\">\"example_value\"<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">}<\/span><\/p><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">003<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> parsed_data<\/span><span class=\"token punctuation\">[<\/span><span class=\"token symbol\">:example_obj<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span>present<\/span><span class=\"token operator\">?<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token boolean\">true<\/span><\/p><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">004<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> parsed_data<\/span><span class=\"token punctuation\">[<\/span><span class=\"token symbol\">:example_obj<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token symbol\">:example_key<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span>present<\/span><span class=\"token operator\">?<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token boolean\">true<\/span><\/p><\/code><\/pre>\n<p><span>5. String\u30ad\u30fc\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b<\/span><br \/><code><span style=\"font-family: monospace; word-wrap: break-word;\">JSON.parse<\/span><\/code><span>\u30e1\u30bd\u30c3\u30c9\u304cString\u30ad\u30fc\u3092\u8fd4\u5374\u3059\u308b\u3053\u3068\u3092\u7406\u89e3\u3057\u305f\u4e0a\u3067\u3001\u305d\u306e\u307e\u307eString\u30ad\u30fc\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306e\u3082\u6b63\u3057\u3044\u5bfe\u51e6\u6cd5\u3067\u3059\u3002<\/span><\/p>\n<pre class=\"language-ruby\" tabindex=\"0\"><code class=\"language-ruby\"><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">001<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> response_body <\/span><span class=\"token operator\">=<\/span><span> <\/span><span class=\"token string\">'{\"example_key\": \"example_value\"}'<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token string\">\"{\\\"example_key\\\": \\\"example_value\\\"}\"<\/span><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">002<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> parsed_data <\/span><span class=\"token operator\">=<\/span><span> <\/span><span class=\"token constant\">JSON<\/span><span class=\"token punctuation\">.<\/span><span>parse<\/span><span class=\"token punctuation\">(<\/span><span>response_body<\/span><span class=\"token punctuation\">)<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token punctuation\">{<\/span><span class=\"token string\">\"example_key\"<\/span><span class=\"token operator\">=&gt;<\/span><span class=\"token string\">\"example_value\"<\/span><span class=\"token punctuation\">}<\/span><\/p><p><span>irb<\/span><span class=\"token punctuation\">(<\/span><span>main<\/span><span class=\"token punctuation\">)<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">003<\/span><span class=\"token operator\">:<\/span><span class=\"token number\">0<\/span><span class=\"token operator\">&gt;<\/span><span> parsed_data<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">\"example_key\"<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span><span>present<\/span><span class=\"token operator\">?<\/span><br\/><span class=\"token operator\">=&gt;<\/span><span> <\/span><span class=\"token boolean\">true<\/span><\/p><\/code><\/pre>\n<h2><span>\u307e\u3068\u3081<\/span><\/h2>\n<p><span>5\u5e74\u3076\u308a\u306bRuby\u306b\u5fa9\u5e30\u3057\u3066\u9665\u3063\u305f <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">nil<\/span><\/code><span> \u30d0\u30b0\u304b\u3089\u3001\u4ee5\u4e0b\u306e\u3053\u3068\u3092\u5b66\u3073\u76f4\u3057\u307e\u3057\u305f\u3002<\/span><\/p>\n<ul>\n<li value=\"1\"><code><span style=\"font-family: monospace; word-wrap: break-word;\">Symbol<\/span><\/code><span>\u306f\u3001Ruby\u306e\u5b9f\u884c\u74b0\u5883\u5168\u4f53\u3067\u5e38\u306b\u4e00\u610f\u306aObject\u3067\u3042\u308a\u3001Immutable\u306a\u300c\u8b58\u5225\u5b50\u300d\u3067\u3042\u308b<\/span><\/li>\n<li value=\"2\"><code><span style=\"font-family: monospace; word-wrap: break-word;\">String<\/span><\/code><span>\u306f\u3001\uff08<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">frozen_string_literal<\/span><\/code><span>\u304c\u6709\u52b9\u3067\u306a\u3044\u9650\u308a) \u30e1\u30e2\u30ea\u4e0a\u306b\u518d\u751f\u6210\u3055\u308c\u3046\u308bObject\u3067\u3042\u308a\u3001Mutable\u306a\u300c\u30c7\u30fc\u30bf\u300d\u3067\u3042\u308b<\/span><\/li>\n<li value=\"3\"><span>Rails\u306e <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">params<\/span><\/code><span> \u304c\u3069\u3061\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u306e\u306f <\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">HashWithIndifferentAccess<\/span><\/code><span> \u30af\u30e9\u30b9\u306e\u304a\u304b\u3052\u3067\u3042\u308a\u3001\u300c\u5916\u90e8API\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u3092JSON\u3067parse\u3059\u308b\u306a\u3069\u3067&#8221;\u7d20\u306eHash&#8221;\u3092\u6271\u3046\u969b\u306f\u3001\u30ad\u30fc\u304cString\u304bSymbol\u304b\u3092\u610f\u8b58\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b<\/span><\/li>\n<\/ul>\n<p><span>\u3053\u306e\u9055\u3044\u3092\u30bb\u30de\u30f3\u30c6\u30a3\u30af\u30b9(\u610f\u5473\u8ad6)\u30ec\u30d9\u30eb\u3067\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001<\/span><code><span style=\"font-family: monospace; word-wrap: break-word;\">nil\u30d0\u30b0<\/span><\/code><span>\u306b\u60a9\u307e\u3055\u308c\u305a\u5805\u7262\u306a\u30b3\u30fc\u30c9\u306b\u7e4b\u304c\u308a\u307e\u3059\u3002<\/span><\/p>\n<h2><span>\u53c2\u8003\u6587\u732e<\/span><\/h2>\n<div class=\"post-content-embed post-content-embed__no-image\">\n<a target=\"_blank\" target=\"_blank\" class=\"post-content-embed--link\" rel=\"nofollow noopener\" href=\"https:\/\/docs.ruby-lang.org\/ja\/latest\/class\/Symbol.html\"><\/p>\n<div class=\"post-content-embed--content\">\n<p>class Symbol<\/p>\n<p>\u30b7\u30f3\u30dc\u30eb\u3092\u8868\u3059\u30af\u30e9\u30b9\u3002\u30b7\u30f3\u30dc\u30eb\u306f\u4efb\u610f\u306e\u6587\u5b57\u5217\u3068\u4e00\u5bfe\u4e00\u306b\u5bfe\u5fdc\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3059\u3002<\/p>\n<\/div>\n<p><\/a><\/div>\n<div class=\"post-content-embed post-content-embed__no-image\">\n<a target=\"_blank\" target=\"_blank\" class=\"post-content-embed--link\" rel=\"nofollow noopener\" href=\"https:\/\/docs.ruby-lang.org\/ja\/latest\/class\/String.html\"><\/p>\n<div class=\"post-content-embed--content\">\n<p>class String<\/p>\n<p>\u6587\u5b57\u5217\u306e\u30af\u30e9\u30b9\u3067\u3059\u3002 \u30cc\u30eb\u6587\u5b57\u3092\u542b\u3080\u4efb\u610f\u306e\u30d0\u30a4\u30c8\u5217\u3092\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u6587\u5b57\u5217\u306e\u9577\u3055\u306b\u306f\u30e1\u30e2\u30ea\u5bb9\u91cf\u4ee5\u5916\u306e\u5236\u9650\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<\/div>\n<p><\/a><\/div>\n<div class=\"post-content-embed post-content-embed__no-image\">\n<a target=\"_blank\" target=\"_blank\" class=\"post-content-embed--link\" rel=\"nofollow noopener\" href=\"https:\/\/docs.ruby-lang.org\/ja\/latest\/class\/Hash.html\"><\/p>\n<div class=\"post-content-embed--content\">\n<p>class Hash<\/p>\n<p>\u30cf\u30c3\u30b7\u30e5\u30c6\u30fc\u30d6\u30eb(\u9023\u60f3\u914d\u5217\u3068\u3082\u547c\u3076)\u306e\u30af\u30e9\u30b9\u3067\u3059\u3002\u30cf\u30c3\u30b7\u30e5\u306f\u4efb\u610f\u306e\u7a2e\u985e\u306e\u30aa\u30d6 \u30b8\u30a7\u30af\u30c8(\u30ad\u30fc)\u304b\u3089\u4efb\u610f\u306e\u7a2e\u985e\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8(\u5024)\u3078\u306e\u95a2\u9023\u3065\u3051\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n<p><\/a><\/div>\n<div class=\"post-content-embed post-content-embed__no-image\">\n<a target=\"_blank\" target=\"_blank\" class=\"post-content-embed--link\" rel=\"nofollow noopener\" href=\"https:\/\/api.rubyonrails.org\/classes\/ActiveSupport\/HashWithIndifferentAccess.html\"><\/p>\n<div class=\"post-content-embed--content\">\n<p>ActiveSupport::HashWithIndifferentAccess<\/p>\n<p>Hash With Indifferent Access\u00b6 \u2191 Implements a hash where keys :foo and &#8220;foo&#8221; are considered to be the same. rgb = ActiveSupport::HashWithIndifferentAccess.<\/p>\n<\/div>\n<p><\/a><\/div>\n<div class=\"post-content-embed\">\n<a target=\"_blank\" target=\"_blank\" class=\"post-content-embed--link\" rel=\"nofollow noopener\" href=\"https:\/\/guides.rubyonrails.org\/active_support_core_extensions.html#indifferent-access\"><\/p>\n<div class=\"post-content-embed--content\">\n<p>Active Support Core Extensions &#8211; Ruby on Rails Guides<\/p>\n<p>Active Support is the Ruby on Rails component responsible for providing Ruby language extensions and utilities.It offers a richer bottom-line at the language level, targeted both at the development of Rails applications, and at the development of Ruby on <\/p>\n<\/div>\n<p><\/a><\/div>\n<div class=\"post-content-embed post-content-embed__no-image\">\n<a target=\"_blank\" target=\"_blank\" class=\"post-content-embed--link\" rel=\"nofollow noopener\" href=\"https:\/\/docs.ruby-lang.org\/ja\/latest\/method\/JSON\/m\/parse.html\"><\/p>\n<div class=\"post-content-embed--content\">\n<p>JSON.#parse (Ruby 3.4 \u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u30de\u30cb\u30e5\u30a2\u30eb)<\/p>\n<p>\u4e0e\u3048\u3089\u308c\u305f JSON \u5f62\u5f0f\u306e\u6587\u5b57\u5217\u3092 Ruby \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u5909\u63db\u3057\u3066\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n<p><\/a><\/div>\n<div class=\"post-content-embed post-content-embed__no-image\">\n<a target=\"_blank\" target=\"_blank\" class=\"post-content-embed--link\" rel=\"nofollow noopener\" href=\"https:\/\/www.ruby-lang.org\/ja\/documentation\/ruby-from-other-languages\/\"><\/p>\n<div class=\"post-content-embed--content\">\n<p>\u4ed6\u8a00\u8a9e\u304b\u3089\u306eRuby\u5165\u9580<\/p>\n<p>Ruby\u306e\u30b3\u30fc\u30c9\u3092\u76ee\u306b\u3059\u308b\u3068\u3001 \u4ed6\u306e\u8a00\u8a9e\u3068\u4f3c\u305f\u90e8\u5206\u304c\u3042\u308b\u3053\u3068\u306b\u6c17\u304c\u4ed8\u304f\u306f\u305a\u3067\u3059\u3002 \u69cb\u6587\u306e\u591a\u304f\u306f\u3001(\u4ed6\u306e\u8a00\u8a9e\u306e\u4e2d\u3067\u3082\u7279\u306b)Perl\u3084Python\u3001 Java\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\u306b\u3068\u3063\u3066\u99b4\u67d3\u307f\u306e\u3042\u308b\u3082\u306e\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002 \u3082\u3057\u3042\u306a\u305f\u304c\u305d\u3046\u3057\u305f\u8a00\u8a9e\u306b\u6163\u308c\u89aa\u3057\u3093\u3067\u3044\u308b\u306e\u306a\u3089\u3001 Ruby\u3092\u5b66\u3076\u306e\u306f\u304a\u305d\u3089\u304f\u3069\u3046\u3063\u3066\u3053\u3068\u306a\u3044\u306f\u305a\u3067\u3059\u3002 \u3053\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306f2\u90e8\u69cb\u6210\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002 \u3053\u306e\u30da\u30fc\u30b8\u3067\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e X \u304b\u3089Ruby\u3078\u79fb\u3063\u3066\u304f\u308b\u969b\u306b\u5f79\u7acb\u3064\u60c5\u5831\u3092\u3056\u3063\u3068\u7d39\u4ecb\u3057\u307e\u3059\u3002 \u500b\u5225\u306e\u30da\u30fc\u30b8\u3067\u306f\u3001Ruby\u306e\u4e3b\u306a\u8a00\u8a9e\u6a5f\u80fd\u3092\u7d39\u4ecb\u3057\u3064\u3064<\/p>\n<\/div>\n<p><\/a><\/div>\n<\/div>\n\n<br \/><a href=\"https:\/\/www.wantedly.com\/companies\/wantedly\/post_articles\/1022016\">\u5143\u306e\u8a18\u4e8b\u3092\u78ba\u8a8d\u3059\u308b <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"\u3053\u3093\u306b\u3061\u306f\u3002\u30a6\u30a9\u30f3\u30c6\u30c3\u30c9\u30ea\u30fc\u3067\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u3057\u3066\u3044\u308b\u5c0f\u5ba4 (@nekorush14) \u3067\u3059\u30025\u5e74\u3076\u308a\u306b\u89e6\u308c\u305fRuby\u3067\u8a70\u307e\u3063\u305f\u3068\u3053\u308d\u3092\u6539\u3081\u3066\u5b66\u3073\u76f4\u3057\u305f\u8a71\u3092\u3057\u307e\u3059\u3002\u4eca\u56de\u306fHash\u306eSymbol\u30ad\u30fc\u3068String\u30ad [&hellip;]","protected":false},"author":1,"featured_media":23492,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-23491","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-company-tec"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ruby\u306eHash\u306b\u304a\u3051\u308bSymbol\u30ad\u30fc\u3068String\u30ad\u30fc\u306e\u9055\u3044\u3092\u5b66\u3073\u76f4\u3057\u305f\u8a71 | Wantedly Engineer Blog - \u30dd\u30b1\u30b3\u30f3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wantedly.com\/companies\/wantedly\/post_articles\/1022016\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ruby\u306eHash\u306b\u304a\u3051\u308bSymbol\u30ad\u30fc\u3068String\u30ad\u30fc\u306e\u9055\u3044\u3092\u5b66\u3073\u76f4\u3057\u305f\u8a71 | Wantedly Engineer Blog - \u30dd\u30b1\u30b3\u30f3\" \/>\n<meta property=\"og:description\" content=\"\u3053\u3093\u306b\u3061\u306f\u3002\u30a6\u30a9\u30f3\u30c6\u30c3\u30c9\u30ea\u30fc\u3067\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u3057\u3066\u3044\u308b\u5c0f\u5ba4 (@nekorush14) 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name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"info@pokecon.jp\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"4\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.wantedly.com\\\/companies\\\/wantedly\\\/post_articles\\\/1022016#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/pokecon.jp\\\/job\\\/23491\\\/\"},\"author\":{\"name\":\"info@pokecon.jp\",\"@id\":\"https:\\\/\\\/pokecon.jp\\\/job\\\/#\\\/schema\\\/person\\\/16c9f07b1ba984d165d9aee259bda997\"},\"headline\":\"Ruby\u306eHash\u306b\u304a\u3051\u308bSymbol\u30ad\u30fc\u3068String\u30ad\u30fc\u306e\u9055\u3044\u3092\u5b66\u3073\u76f4\u3057\u305f\u8a71 | Wantedly Engineer 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