{"id":26759,"date":"2025-12-06T23:00:54","date_gmt":"2025-12-06T23:00:54","guid":{"rendered":"https:\/\/pokecon.jp\/job\/?p=26759"},"modified":"2025-12-06T23:00:54","modified_gmt":"2025-12-06T23:00:54","slug":"go-%e3%81%ae-json-%e5%87%a6%e7%90%86%e3%81%8c%e5%a4%89%e3%82%8f%e3%82%8b%ef%bc%81encoding-json-v2-%e3%81%ae%e3%83%86%e3%82%b9%e3%83%88%e3%82%b3%e3%83%bc%e3%83%89%e3%81%8b%e3%82%89%e5%ad%a6%e3%81%b6-15","status":"publish","type":"post","link":"https:\/\/pokecon.jp\/job\/26759\/","title":{"rendered":"Go \u306e JSON \u51e6\u7406\u304c\u5909\u308f\u308b\uff01encoding\/json\/v2 \u306e\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u304b\u3089\u5b66\u3076 15 \u306e\u65b0\u5e38\u8b58"},"content":{"rendered":"\n<\/p>\n
\n

\u3053\u3093\u306b\u3061\u306f\u3001DX \u30d3\u30b8\u30cd\u30b9\u958b\u767a\u90e8\u306e\u5ca1\u7559\u3067\u3059\u3002\u666e\u6bb5\u306f Support & Growth Portal<\/a>\u306e\u958b\u767a\u3092\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u672c\u8a18\u4e8b\u306f\u3001OPTiM TECH BLOG Advent Calendar 2025<\/a> Day 6 \u304a\u3088\u3073 Go Advent Calendar 2025<\/a> \u30b7\u30ea\u30fc\u30ba2 Day 6 \u306e\u8a18\u4e8b\u3067\u3059\uff01<\/p>\n

\u4eca\u56de\u306f\u3001Go 1.25 \u3067\u5b9f\u9a13\u7684\u306b\u8ffd\u52a0\u3055\u308c 1.26 \u3067\u672c\u683c\u5c0e\u5165\u3055\u308c\u308b\u304b\u3082\u3057\u308c\u306a\u3044 encoding\/json\/v2<\/code> \u306b\u3064\u3044\u3066\u306e\u8a71\u3067\u3059\u3002
Go \u306e\u516c\u5f0f\u30ea\u30dd\u30b8\u30c8\u30ea\u306b\u306f v1 \u3068 v2 \u306e\u52d5\u4f5c\u306e\u9055\u3044\u3092\u78ba\u8a8d\u3067\u304d\u308b v2_diff_test.go \u3068\u3044\u3046\u30c6\u30b9\u30c8<\/a> \u304c\u7528\u610f\u3055\u308c\u3066\u304a\u308a\u300115 \u500b\u306e\u30c6\u30b9\u30c8\u95a2\u6570\u3068\u3057\u3066\u307e\u3068\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u3061\u3089\u3092\u53c2\u8003\u306b\u5909\u66f4\u70b9\u3092\u307f\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\uff01<\/p>\n

1. \u5927\u6587\u5b57\u5c0f\u6587\u5b57\u306e\u533a\u5225\uff08#14750<\/a>\uff09<\/h3>\n

JSON \u30ad\u30fc\u3068\u69cb\u9020\u4f53\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5bfe\u5fdc\u3065\u3051\u308b JSON \u30bf\u30b0\u306b\u3064\u3044\u3066\u3067\u3059\u3002
v1 \u3067\u306f json \u30bf\u30b0\u3068 json \u30ad\u30fc\u306e\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u533a\u5225\u3057\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u304c\u3001\u672a\u77e5\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092 unmarshal \u3059\u308b\u969b\u306b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30b3\u30b9\u30c8\u304c\u767a\u751f\u3059\u308b\u305f\u3081\u3001v2 \u3067\u306f\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u533a\u5225\u3059\u308b\u306e\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u52d5\u4f5c\u306b\u306a\u308a\u307e\u3059\u3002
case:ignore<\/code>\u306b\u3088\u3063\u3066 v2 \u3067\u3082\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u533a\u5225\u3057\u306a\u3044\u3088\u3046\u306b\u3067\u304d\u307e\u3059\u304c\u3001\u300c-\u300d \u3084 \u300c_\u300d \u3082\u7121\u8996\u3055\u308c v1 \u3088\u308a\u7de9\u304f\u30de\u30c3\u30c1\u3055\u308c\u307e\u3059\u3002<\/strong><\/p>\n

type<\/span> Fields struct<\/span> {\n    FieldA bool<\/span>\n    FieldB bool<\/span> `json:\"fooBar\"`<\/span>\n    FieldC bool<\/span> `json:\"fizzBuzz,case:ignore\"`<\/span> \n}\n<\/pre>\n
Unmarshal \u306e\u6bd4\u8f03<\/strong><\/p>\n
\n\n\n\n\n\n\n\n
 \u5165\u529b\/\u5024                        <\/th>\n v1     <\/th>\n v2                     <\/th>\n<\/tr>\n<\/thead>\n
 {\"fielda\": true}<\/code> \u2192 FieldA    <\/td>\n true<\/code> <\/td>\n false<\/code> (\u30de\u30c3\u30c1\u3057\u306a\u3044) <\/td>\n<\/tr>\n
 {\"FooBar\": true}<\/code> \u2192 FieldB    <\/td>\n true<\/code> <\/td>\n false<\/code> (\u30de\u30c3\u30c1\u3057\u306a\u3044) <\/td>\n<\/tr>\n
 {\"FIZZBUZZ\": true}<\/code> \u2192 FieldC  <\/td>\n true<\/code> <\/td>\n true<\/code> (case:ignore<\/code>) <\/td>\n<\/tr>\n
 {\"fizz_buzz\": true}<\/code> \u2192 FieldC <\/td>\n true<\/code> <\/td>\n true<\/code> (case:ignore<\/code>) <\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n
2. omitempty \u306e\u5b9a\u7fa9\u5909\u66f4\uff08#11939<\/a>, #22480<\/a>\uff09<\/h3>\n
v1 \u3067\u306f omitempty \u3092\u4ed8\u4e0e\u3057\u305f\u30d5\u30a3\u30fc\u30eb\u30c9\u304c Go \u306e\u7a7a\u5024\uff08false<\/code>,0<\/code>,nil<\/code>,\"\"<\/code>\uff09\u3067\u3042\u308b\u5834\u5408\u306e\u30de\u30fc\u30b7\u30e3\u30ea\u30f3\u30b0\u304c\u7701\u7565\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u304c\u3001v2 \u3067\u306f omitempty \u3092\u4ed8\u4e0e\u3057\u305f\u30d5\u30a3\u30fc\u30eb\u30c9\u304c JSON \u306e\u7a7a\u5024\uff08null<\/code>,\"\"<\/code>,[]<\/code>,{}<\/code>\uff09\u3067\u3042\u308b\u5834\u5408\u306e\u30de\u30fc\u30b7\u30e3\u30ea\u30f3\u30b0\u3092\u7701\u7565\u3057\u307e\u3059\u3002<\/p>\n
type<\/span> Struct struct<\/span> {\n    Foo string<\/span>  `json:\",omitempty\"`<\/span>\n    Bar []int<\/span>   `json:\",omitempty\"`<\/span>\n    Baz *Struct `json:\",omitempty\"`<\/span>\n}\ntype<\/span> Types struct<\/span> {\n    Bool     bool<\/span>     `json:\",omitempty\"`<\/span>\n    Int      int<\/span>      `json:\",omitempty\"`<\/span>\n    StructA  Struct   `json:\",omitempty\"`<\/span>\n    StructB  Struct   `json:\",omitempty\"`<\/span>\n    PointerB *string<\/span>  `json:\",omitempty\"`<\/span>\n}\n<\/pre>\n
Marshal \u306e\u6bd4\u8f03<\/strong><\/p>\n
\n\n\n\n\n\n\n\n\n
 \u30d5\u30a3\u30fc\u30eb\u30c9 <\/th>\n \u5024                                       <\/th>\n v1           <\/th>\n v2      <\/th>\n<\/tr>\n<\/thead>\n
 Bool       <\/td>\n false<\/code>                                  <\/td>\n \u7701\u7565         <\/td>\n false<\/code> <\/td>\n<\/tr>\n
 Int        <\/td>\n 0<\/code>                                      <\/td>\n \u7701\u7565         <\/td>\n 0<\/code>     <\/td>\n<\/tr>\n
 StructA    <\/td>\n Struct{}<\/code>                               <\/td>\n {}<\/code>         <\/td>\n \u7701\u7565    <\/td>\n<\/tr>\n
 StructB    <\/td>\n Struct{Bar: []int{}, Baz: new(Struct)}<\/code> <\/td>\n {\"Baz\":{}}<\/code> <\/td>\n \u7701\u7565    <\/td>\n<\/tr>\n
 PointerB   <\/td>\n new(string)<\/code> (\u2192\"\"<\/code>)                    <\/td>\n \"\"<\/code>         <\/td>\n \u7701\u7565    <\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n
3. string \u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u9069\u7528\u7bc4\u56f2\uff08#34268<\/a>\uff09<\/h3>\n
\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u3092\u30de\u30fc\u30b7\u30e3\u30ea\u30f3\u30b0\u6642\u306b\u6587\u5b57\u5217\u3078\u3068\u5909\u63db\u3059\u308b string<\/code> \u30aa\u30d7\u30b7\u30e7\u30f3\u306b\u95a2\u3059\u308b\u5909\u66f4\u3067\u3059\u3002
v1 \u3067\u306f string \u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u3001\u6587\u5b57\u5217\u3001bool\u3001\u6570\u5024\u306b\u9069\u7528\u3055\u308c\u3066\u3044\u305f\u304c\u3001v2 \u3067\u306f\u6570\u5024\u306e\u307f\u306b\u5236\u9650\u3055\u308c\u307e\u3059\u3002Go Module Proxy \u306b\u5b58\u5728\u3059\u308b\u30b3\u30fc\u30c9\u3092\u898b\u305f\u7d50\u679c\u3001\u5b9f\u969b\u306e\u6587\u5b57\u5217\u5316\u306e\u7528\u9014\u304c\u6570\u5024\u306b\u9650\u3089\u308c\u3066\u3044\u305f\u3068\u3044\u3046\u3053\u3068\u3089\u3057\u3044\u3067\u3059\u3002
\u3055\u3089\u306b v2 \u3067\u306f\u3001\u30b9\u30e9\u30a4\u30b9\u3001\u30de\u30c3\u30d7\u3001\u306a\u3069\u306e\u8907\u5408\u578b\u5185\u306e\u6570\u5024\u306b\u3082\u518d\u5e30\u7684\u306b\u9069\u7528\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
type<\/span> Types struct<\/span> {\n    String   string<\/span>         `json:\",string\"`<\/span>\n    Bool     bool<\/span>           `json:\",string\"`<\/span>\n    Int      int<\/span>            `json:\",string\"`<\/span>\n    Map      map<\/span>[string<\/span>]int<\/span> `json:\",string\"`<\/span>\n    Slice    []int<\/span>          `json:\",string\"`<\/span>\n    PointerC **int<\/span>          `json:\",string\"`<\/span>\n}\n<\/pre>\n
Marshal \u306e\u6bd4\u8f03<\/strong><\/p>\n
\n\n\n\n\n\n\n\n\n\n
 \u30d5\u30a3\u30fc\u30eb\u30c9 <\/th>\n \u5024            <\/th>\n v1             <\/th>\n v2             <\/th>\n<\/tr>\n<\/thead>\n
 String     <\/td>\n \"string\"<\/code>    <\/td>\n \"\\\"string\\\"\"<\/code> <\/td>\n \"string\"<\/code>     <\/td>\n<\/tr>\n
 Bool       <\/td>\n true<\/code>        <\/td>\n \"true\"<\/code>       <\/td>\n true<\/code>         <\/td>\n<\/tr>\n
 Int        <\/td>\n 1<\/code>           <\/td>\n \"1\"<\/code>          <\/td>\n \"1\"<\/code>          <\/td>\n<\/tr>\n
 Map        <\/td>\n {\"Name\": 1}<\/code> <\/td>\n {\"Name\":1}<\/code>   <\/td>\n {\"Name\":\"1\"}<\/code> <\/td>\n<\/tr>\n
 Slice      <\/td>\n [1]<\/code>         <\/td>\n [1]<\/code>          <\/td>\n [\"1\"]<\/code>        <\/td>\n<\/tr>\n
 PointerC   <\/td>\n **1<\/code>         <\/td>\n 1<\/code>            <\/td>\n \"1\"<\/code>          <\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n
Unmarshal \u306e\u6bd4\u8f03<\/strong><\/p>\n
\n\n\n\n\n\n
 \u5165\u529b                    <\/th>\n v1            <\/th>\n v2                   <\/th>\n<\/tr>\n<\/thead>\n
 {\"Bool\": \"true\"}<\/code>      <\/td>\n true<\/code> (\u6210\u529f) <\/td>\n \u30a8\u30e9\u30fc               <\/td>\n<\/tr>\n
 {\"Map\": {\"Name\":\"1\"}}<\/code> <\/td>\n \u30a8\u30e9\u30fc        <\/td>\n {\"Name\": 1}<\/code> (\u6210\u529f) <\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n
4. nil \u30b9\u30e9\u30a4\u30b9\u3001\u30de\u30c3\u30d7\u306e\u51fa\u529b\uff08#27589<\/a>, #37711<\/a>\uff09<\/h3>\n
Go \u306e\u30b9\u30e9\u30a4\u30b9\u3068\u30de\u30c3\u30d7\u304c\u521d\u671f\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u72b6\u614b\u3067\u30de\u30fc\u30b7\u30e3\u30ea\u30f3\u30b0\u3055\u308c\u305f\u6642\u306e\u52d5\u4f5c\u304c\u5909\u308f\u308a\u307e\u3059\u3002
v1 \u3067\u306f nil \u30b9\u30e9\u30a4\u30b9\u3068 nil \u30de\u30c3\u30d7\u306e\u30de\u30fc\u30b7\u30e3\u30ea\u30f3\u30b0\u306f null<\/code> \u3067\u3057\u305f\u304c\u3001v2 \u3067\u306f\u7a7a\u306e\u914d\u5217\u3068\u7a7a\u306e JSON \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u306a\u308a\u307e\u3059\u3002
\u30b9\u30e9\u30a4\u30b9\u3084\u30de\u30c3\u30d7\u304c nil \u306b\u306a\u308a\u3046\u308b\u3068\u3044\u3046 Go \u8a00\u8a9e\u7279\u6709\u306e\u60c5\u5831\u3092\u3001JSON \u3068\u3044\u3046\u8a00\u8a9e\u306b\u4f9d\u5b58\u3057\u306a\u3044\u30c7\u30fc\u30bf\u4ea4\u63db\u5f62\u5f0f\u306e\u8868\u73fe\u306b\u6f0f\u3089\u3059\u3079\u304d\u3067\u306f\u306a\u3044\u3068\u3044\u3046\u7406\u7531\u306e\u3088\u3046\u3067\u3059\u3002
format:emitnull<\/code>\u30bf\u30b0\u306b\u3088\u3063\u3066 v2 \u3067\u3082 v1 \u306e\u52d5\u4f5c\u3092\u5f37\u5236\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n
type<\/span> Types struct<\/span> {\n    Slice []int<\/span>\n    Map   map<\/span>[string<\/span>]int<\/span>\n}\n<\/pre>\n
Marshal \u306e\u6bd4\u8f03<\/strong><\/p>\n
\n\n\n\n\n\n
 \u30d5\u30a3\u30fc\u30eb\u30c9 <\/th>\n \u5024    <\/th>\n v1     <\/th>\n v2   <\/th>\n<\/tr>\n<\/thead>\n
 Slice      <\/td>\n nil<\/code> <\/td>\n null<\/code> <\/td>\n []<\/code> <\/td>\n<\/tr>\n
 Map        <\/td>\n nil<\/code> <\/td>\n null<\/code> <\/td>\n {}<\/code> <\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n
5. \u56fa\u5b9a\u9577\u914d\u5217\u306e\u9577\u3055\u30c1\u30a7\u30c3\u30af<\/h3>\n
v1 \u3067\u306f\u4efb\u610f\u306e\u9577\u3055\u306e JSON \u914d\u5217\u3092 Go \u306e\u914d\u5217\u3078 unmarshal \u3067\u304d\u307e\u3057\u305f\u304c\u3001v2 \u3067\u306f\u8981\u7d20\u6570\u304c\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u30a8\u30e9\u30fc\u3068\u306a\u308a\u307e\u3059\u3002
\nGo \u3067\u30b9\u30e9\u30a4\u30b9\uff08\u53ef\u5909\u9577\uff09\u3067\u306f\u306a\u304f\u914d\u5217\uff08\u56fa\u5b9a\u9577\uff09\u3092\u9078\u629e\u3057\u3066\u4f7f\u7528\u3059\u308b\u5834\u5408\u306b\u306f\u9577\u3055\u306b\u91cd\u8981\u306a\u610f\u5473\u3092\u6301\u3063\u3066\u3044\u308b\u306f\u305a\u306a\u306e\u3067\u3001\u3053\u306e\u8a73\u7d30\u306a\u60c5\u5831\u3092\u7121\u8996\u3059\u308b\u3053\u3068\u306f\u30d0\u30b0\u3078\u3068\u7e4b\u304c\u308a\u3084\u3059\u3044\u305f\u3081\u4fee\u6b63\u3055\u308c\u307e\u3059\u3002<\/p>\n
var<\/span> arr [3<\/span>]int<\/span>\n<\/pre>\n
Unmarshal \u306e\u6bd4\u8f03<\/strong><\/p>\n
\n\n\n\n\n\n\n
 \u5165\u529b              <\/th>\n v1                     <\/th>\n v2          <\/th>\n<\/tr>\n<\/thead>\n
 [1, 2, 3, 4, 5]<\/code> <\/td>\n [1, 2, 3]<\/code> (\u5207\u308a\u8a70\u3081) <\/td>\n \u30a8\u30e9\u30fc      <\/td>\n<\/tr>\n
 [1, 2]<\/code>          <\/td>\n [1, 2, 0]<\/code> (\u30bc\u30ed\u57cb\u3081) <\/td>\n \u30a8\u30e9\u30fc      <\/td>\n<\/tr>\n
 [1, 2, 3]<\/code>       <\/td>\n [1, 2, 3]<\/code>            <\/td>\n [1, 2, 3]<\/code> <\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n
6. \u30d0\u30a4\u30c8\u914d\u5217\uff08[N]byte\uff09\u306e\u30a8\u30f3\u30b3\u30fc\u30c9<\/h3>\n
v1 \u3067\u306f\u7b26\u53f7\u306a\u3057\u6574\u6570\u914d\u5217\u3068\u306a\u3063\u3066\u3044\u307e\u3057\u305f\u304c\u3001v2 \u3067\u306f\u30d0\u30a4\u30ca\u30ea\u5024\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001[N]byte<\/code> \u3068 []byte<\/code> \u306e\u52d5\u4f5c\u306b\u4e00\u8cab\u6027\u304c\u3067\u307e\u3059\u3002
format:array<\/code>\u30bf\u30b0\u306b\u3088\u3063\u3066 v2 \u3067\u3082 v1 \u306e\u52d5\u4f5c\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
type<\/span> Types struct<\/span> {\n    ArrayN [4<\/span>]byte<\/span>\n}\n<\/pre>\n
Marshal \u306e\u6bd4\u8f03<\/strong><\/p>\n
\n\n\n\n\n
 \u30d5\u30a3\u30fc\u30eb\u30c9 <\/th>\n \u5024                 <\/th>\n v1          <\/th>\n v2           <\/th>\n<\/tr>\n<\/thead>\n
 ArrayN     <\/td>\n [4]byte{1,2,3,4}<\/code> <\/td>\n [1,2,3,4]<\/code> <\/td>\n \"AQIDBA==\"<\/code> <\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n
7. \u30dd\u30a4\u30f3\u30bf\u30ec\u30b7\u30fc\u30d0\u306e\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\uff08#27722<\/a>, #33993<\/a>\uff09<\/h3>\n
Go \u3067\u306f\u578b\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9\u3059\u308b\u969b\u306b\u3001\u5024\u30ec\u30b7\u30fc\u30d0\u3068\u30dd\u30a4\u30f3\u30bf\u30ec\u30b7\u30fc\u30d0\u3067\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u666e\u901a\u306b\u4f7f\u3046\u5206\u306b\u306f\u5024\u306b\u5bfe\u3057\u3066\u30dd\u30a4\u30f3\u30bf\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3093\u3067\u3082 Go \u304c\u81ea\u52d5\u7684\u306b\u30dd\u30a4\u30f3\u30bf\u306b\u5909\u63db\u3057\u3066\u547c\u3073\u51fa\u3059\u4ed5\u7d44\u307f\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u30de\u30c3\u30d7\u306e\u5024\u306a\u3069\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3067\u304d\u306a\u3044\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\ntype<\/span> MyInt int<\/span>\nfunc<\/span> (m *MyInt) PointerMethod() {}\n\nvar<\/span> n MyInt = 42<\/span>\nn.PointerMethod() \n\nm := map<\/span>[string<\/span>]MyInt{\"key\"<\/span>: 42<\/span>}\nm[\"key\"<\/span>].PointerMethod() \n<\/pre>\n
v1 \u3067\u306f\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3067\u304d\u308b\u3068\u3053\u308d\u3067\u306e\u307f\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3070\u308c\u3066\u3044\u307e\u3057\u305f\u304c\u3001v2 \u3067\u306f\u30a2\u30c9\u30ec\u30b9\u304c\u53d6\u5f97\u3067\u304d\u306a\u3044\u5834\u5408\u3067\u3082\u4e00\u6642\u7684\u306b\u30d2\u30fc\u30d7\u306b\u30b3\u30d4\u30fc\u3057\u3066\u30a2\u30c9\u30ec\u30b9\u3092\u4f5c\u308b\u3053\u3068\u3067\u5e38\u306b\u30dd\u30a4\u30f3\u30bf\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
type<\/span> PointerReceiver int<\/span>\n\nfunc<\/span> (p *PointerReceiver) MarshalJSON() ([]byte<\/span>, error<\/span>) {\n    return<\/span> []byte<\/span>(fmt.Sprintf(`\"%d\"`<\/span>, *p)), nil<\/span>\n}\n\ntype<\/span> Types struct<\/span> {\n    PointerReceiver PointerReceiver\n}\n<\/pre>\n
Marshal \u306e\u6bd4\u8f03<\/strong><\/p>\n
\n\n\n\n\n
 \u30d5\u30a3\u30fc\u30eb\u30c9      <\/th>\n \u5024  <\/th>\n v1                       <\/th>\n v2                       <\/th>\n<\/tr>\n<\/thead>\n
 PointerReceiver <\/td>\n 1<\/code> <\/td>\n 1<\/code> (\u30e1\u30bd\u30c3\u30c9\u547c\u3070\u308c\u306a\u3044) <\/td>\n \"1\"<\/code> (\u30e1\u30bd\u30c3\u30c9\u547c\u3070\u308c\u308b) <\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n
8. \u30de\u30c3\u30d7\u306e\u51fa\u529b\u9806\u5e8f\uff08#27179<\/a>\uff09<\/h3>\n
v1 \u3067\u306f\u30de\u30c3\u30d7\u306f\u6c7a\u3081\u3089\u308c\u305f\u30ad\u30fc\u9806\u5e8f\u3067\u30de\u30fc\u30b7\u30e3\u30eb\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u304c\u3001v2 \u3067\u306f\u30ad\u30fc\u9806\u5e8f\u306f\u56fa\u5b9a\u3055\u308c\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u512a\u5148\u3057\u3001\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u65b9\u5f0f\u3067\u52d5\u4f5c\u3059\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u305f\u3081\u306e\u5909\u66f4\u3067\u3059\u3002<\/p>\n
type<\/span> Types struct<\/span> {\n    Map map<\/span>[string<\/span>]int<\/span>\n}\n<\/pre>\n
Marshal \u306e\u6bd4\u8f03<\/strong><\/p>\n
\n\n\n\n\n
 \u30d5\u30a3\u30fc\u30eb\u30c9 <\/th>\n \u5024                    <\/th>\n v1                                 <\/th>\n v2       <\/th>\n<\/tr>\n<\/thead>\n
 Map        <\/td>\n {\"a\":1,\"b\":2,\"c\":3}<\/code> <\/td>\n {\"a\":1,\"b\":2,\"c\":3}<\/code> (\u30bd\u30fc\u30c8\u6e08\u307f) <\/td>\n \u9806\u5e8f\u4e0d\u5b9a <\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n
9. HTML \u30a8\u30b9\u30b1\u30fc\u30d7<\/h3>\n
v1 \u3067\u306f JSON \u6587\u5b57\u5217\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306f HTML \u95a2\u9023\u306e\u7279\u6b8a\u6587\u5b57\u3092\u30a8\u30b9\u30b1\u30fc\u30d7\u3057\u3066\u3044\u307e\u3057\u305f\u304c\u3001v2 \u3067\u306f RFC 8785 \u306b\u6e96\u62e0\u3057\u305f\u8868\u73fe\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002
HTML \u30a8\u30b9\u30b1\u30fc\u30d7\u306f JSON \u306e\u4ed5\u69d8\u3067\u306f\u306a\u3044\u305f\u3081\u3001JSON \u30e9\u30a4\u30d6\u30e9\u30ea\u3067 HTML \u56fa\u6709\u306e\u30a8\u30b9\u30b1\u30fc\u30d7\u3092\u884c\u3046\u3053\u3068\u306f\u9069\u5207\u3067\u306f\u306a\u304f\u3001\u5fc5\u8981\u3067\u3042\u308c\u3070\u30e6\u30fc\u30b6\u30fc\u304c\u81ea\u5206\u3067\u624b\u52d5\u3067\u78ba\u8a8d\u3059\u308b\u3079\u304d\u3068\u3044\u3046\u3053\u3068\u306e\u3088\u3046\u3067\u3059\u3002<\/p>\n
type<\/span> Types struct<\/span> {\n    String string<\/span>\n}\n<\/pre>\n
Marshal \u306e\u6bd4\u8f03<\/strong><\/p>\n
\n\n\n\n\n
 \u30d5\u30a3\u30fc\u30eb\u30c9 <\/th>\n \u5024                                                   <\/th>\n v1                                                                         <\/th>\n v2                                                     <\/th>\n<\/tr>\n<\/thead>\n
 String     <\/td>\n \"