{"id":3880,"date":"2023-07-27T12:16:24","date_gmt":"2023-07-27T03:16:24","guid":{"rendered":"https:\/\/dennie.tokyo\/it\/?p=3880"},"modified":"2023-08-01T16:17:08","modified_gmt":"2023-08-01T07:17:08","slug":"%e3%80%90go%e3%80%91%e3%82%a4%e3%83%b3%e3%82%bf%e3%83%bc%e3%83%95%e3%82%a7%e3%83%bc%e3%82%b9%e3%81%a8nil","status":"publish","type":"post","link":"https:\/\/dennie.tokyo\/it\/?p=3880","title":{"rendered":"\u3010Go\u3011\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068nil"},"content":{"rendered":"\n

\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u30bc\u30ed\u5024\u306fnil\u3067\u3059\u3002<\/p>\n\n\n\n\n\n\n\n

\u53c2\u8003<\/span>\n

<\/p>\n

\u3010Go\u3011\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u30bc\u30ed\u5024<\/a><\/p>\n<\/div>\n\n\n\n

Go\u306b\u304a\u3044\u3066\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068nil\u3068\u306e\u95a2\u4fc2\u306f\u5c11\u3057\u8907\u96d1\u306a\u3088\u3046\u3067\u3059\u3002<\/p>\n\n\n\n

\u69cb\u9020\u4f53\u3068\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/h1>\n\n\n\n

\u69cb\u9020\u4f53\u306fnil\u6bd4\u8f03\u51fa\u6765\u306a\u3044<\/h2>\n\n\n\n

\u69cb\u9020\u4f53\u3092\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\u3068\u3057\u3066\u5229\u7528\u3059\u308b\u4e8b\u304c\u3088\u304f\u3042\u308b\u306e\u3067\u3001\u305d\u3082\u305d\u3082\u69cb\u9020\u4f53\u304cnil\u6bd4\u8f03\u51fa\u6765\u308b\u306e\u304b\u3068\u3044\u3046\u78ba\u8a8d\u3092\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002
\u7d50\u8ad6\u306f\u69cb\u9020\u4f53\u306e\u30bc\u30ed\u5024\u306fnil\u3067\u306f\u306a\u3044\u306e\u3067\u3001\u3053\u306e\u3088\u3046\u306a\u6bd4\u8f03\u306f\u884c\u3048\u307e\u305b\u3093\u3002\u5b9f\u884c\u3059\u308b\u3068panic\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

package main\n\nimport (\n\t"fmt"\n)\n\n\/\/ \u72ac\u306e\u69cb\u9020\u4f53\u306e\u5b9a\u7fa9\ntype dog struct {\n\tname string\n}\n\nfunc main() {\n\n\t\/\/ \u69cb\u9020\u4f53\u306b\u304a\u3044\u3066\u3053\u306e\u3088\u3046\u306anil\u6bd4\u8f03\u306f\u884c\u3048\u306a\u3044\n\td := dog{}\n\tif d == nil {\n\t\tfmt.Println("nil")\n\t}\n}<\/code><\/pre><\/div>\n\n\n\n
\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5<\/h2>\n\n\n\n
\u69cb\u9020\u4f53\u3092\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\u3068\u3057\u3066nil\u6bd4\u8f03\u3057\u3066\u307f\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u3053\u308c\u3082nil\u6bd4\u8f03\u306f\u884c\u3048\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u69cb\u9020\u4f53\u578b\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u304b\u3089\u3060\u3068\u63a8\u6e2c\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
package main\n\nimport (\n\t"fmt"\n)\n\n\/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9a\u7fa9\ntype myInterface interface {\n\tgetName() string\n}\n\n\/\/ \u72ac\u306e\u69cb\u9020\u4f53\u306e\u5b9a\u7fa9\ntype dog struct {\n\tname string\n}\n\n\/\/ \u72ac\u306e\u30e1\u30bd\u30c3\u30c8\u5b9a\u7fa9\nfunc (d dog) getName() string {\n\treturn d.name\n}\n\nfunc main() {\n\n\t\/\/ \u69cb\u9020\u4f53\u306b\u304a\u3044\u3066\u3053\u306e\u3088\u3046\u306anil\u6bd4\u8f03\u306f\u884c\u3048\u306a\u3044\n\td := dog{}\n\tif d == nil {\n\t\tfmt.Println("nil")\n\t}\n}<\/code><\/pre><\/div>\n\n\n\n
\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u578b\u306e\u660e\u793a<\/h1>\n\n\n\n
\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u578b\u3092\u660e\u793a\u3059\u308b\u3068nil\u6bd4\u8f03\u304c\u884c\u3048\u308b\u3088\u3046\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306bnilEquals\u95a2\u6570\u306e\u5f15\u6570\u3067\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u578b\u3092\u660e\u8a18\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u578b\u3068\u3057\u3066\u6271\u308f\u308c\u308b\u3068\u63a8\u6e2c\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
package main\n\nimport (\n\t"fmt"\n)\n\n\/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9a\u7fa9\ntype myInterface interface {\n\tgetName() string\n}\n\n\/\/ \u72ac\u306e\u69cb\u9020\u4f53\u306e\u5b9a\u7fa9\ntype dog struct {\n\tname string\n}\n\n\/\/ \u72ac\u306e\u30e1\u30bd\u30c3\u30c8\u5b9a\u7fa9\nfunc (d dog) getName() string {\n\treturn d.name\n}\n\nfunc main() {\n\td := dog{}\n\tnilEquals(d) \/\/ Not nil \u304c\u8868\u793a\u3055\u308c\u308b\n}\n\nfunc nilEquals(m myInterface) {\n\tif m == nil {\n\t\tfmt.Println("nil")\n\t} else {\n\t\tfmt.Println("Not nil")\n\t}\n}\n<\/code><\/pre><\/div>\n\n\n\n
\u5177\u8c61\u578b\u3068\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/h1>\n\n\n\n
\u5177\u8c61\u578b\u3068nil<\/h2>\n\n\n\n
\u30dd\u30a4\u30f3\u30bf\u306e\u30bc\u30ed\u5024\u306fnil\u3067\u3059\u3002\u30dd\u30a4\u30f3\u30bf\u578b\u3092\u8fd4\u3059\u95a2\u6570(NewDog)\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002
\u53d7\u3051\u53d6\u3063\u305f\u30dd\u30a4\u30f3\u30bf\u3092nil\u5224\u5b9a\u3059\u308b\u95a2\u6570(nilEquals)\u3078\u6e21\u3057\u4f7f\u7528\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n\n\n\n
package main\n\nimport (\n\t"fmt"\n)\n\n\/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9a\u7fa9\ntype myInterface interface {\n\tgetName() string\n}\n\n\/\/ \u72ac\u306e\u69cb\u9020\u4f53\u306e\u5b9a\u7fa9\ntype dog struct {\n\tname string\n}\n\n\/\/ \u72ac\u306e\u30e1\u30bd\u30c3\u30c8\u5b9a\u7fa9\nfunc (d dog) getName() string {\n\treturn d.name\n}\n\nfunc main() {\n\n\t\/\/ "Not nil", "dog" \u304c\u8868\u793a\u3055\u308c\u308b\n\td := NewDog("dog")\n\tnilEquals(d)\n\n\t\/\/ nilDog\u306fnil\u304b\u3068\u601d\u3044\u304d\u3084 "Not nil" \u304c\u8868\u793a\u3055\u308c\u3001panic\u306b\u306a\u308b\n\tnilDog := NewDog("")\n\tnilEquals(nilDog)\n}\n\n\/\/ dog\u69cb\u9020\u4f53\u306e\u751f\u6210\nfunc NewDog(name string) *dog {\n\tif name == "" {\n\t\treturn nil\n\t}\n\tvar d dog\n\td.name = name\n\treturn &d\n}\n\n\/\/ nil\u5224\u5b9a\nfunc nilEquals(m myInterface) {\n\tif m == nil {\n\t\tfmt.Println("nil")\n\t} else {\n\t\tfmt.Println("Not nil")\n\t\tfmt.Println(m.getName())\n\t}\n}\n<\/code><\/pre><\/div>\n\n\n\n
panic\u304c\u767a\u751f\u3057\u307e\u3059\u3002
NewDog\u95a2\u6570\u306fdog\u578b\u30dd\u30a4\u30f3\u30bf\u3092\u8fd4\u5374\u3057\u307e\u3059\u3002\u3053\u306edog\u578b\u30dd\u30a4\u30f3\u30bf\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u305d\u306e\u5024\u306fnil\u3067\u3059\u3002\u4eca\u56de\u3001nilEquals\u95a2\u6570\u3078\u6e21\u3055\u308c\u305f\u5024\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308b\u578b\u304cdog\u578b\u30dd\u30a4\u30f3\u30bf\u3067\u5024\u304cnil\u3068\u3044\u3046\u4e8b\u306b\u306a\u308a\u307e\u3059\u3002\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304cnil\u3067\u3042\u308b\u6761\u4ef6\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308b\u578b\u3068\u5024\u304cnil\u3067\u3042\u308b\u3053\u3068\u3067\u3059\u3002\u3086\u3048\u306bnil\u5224\u5b9a\u3055\u308c\u306a\u3044\u3088\u3046\u3067\u3059\u3002\u306a\u306e\u3067dog\u578b\u30dd\u30a4\u30f3\u30bf\u306fnil\u306b\u3082\u95a2\u308f\u3089\u305agetName()\u30e1\u30bd\u30c3\u30c8\u304c\u5b9f\u884c\u3055\u308c\u308b\u306e\u3067panic\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u578b\u306e\u660e\u793a<\/h2>\n\n\n\n
\u3053\u3053\u3067\u3082\u307e\u305f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u578b\u3067\u3042\u308b\u4e8b\u3092\u660e\u793a\u3057\u307e\u3059\u3002\u95a2\u6570(NewDog)\u306e\u623b\u308a\u5024\u306e\u578b\u3092\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u578b\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
package main\n\nimport (\n\t"fmt"\n)\n\n\/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9a\u7fa9\ntype myInterface interface {\n\tgetName() string\n}\n\n\/\/ \u72ac\u306e\u69cb\u9020\u4f53\u306e\u5b9a\u7fa9\ntype dog struct {\n\tname string\n}\n\n\/\/ \u72ac\u306e\u30e1\u30bd\u30c3\u30c8\u5b9a\u7fa9\nfunc (d dog) getName() string {\n\treturn d.name\n}\n\nfunc main() {\n\n\t\/\/ "Not nil", "dog" \u304c\u8868\u793a\u3055\u308c\u308b\n\td := NewDog("dog")\n\tnilEquals(d)\n\n\t\/\/ "nil" \u304c\u8868\u793a\u3055\u308c\u308b\n\tnilDog := NewDog("")\n\tnilEquals(nilDog)\n}\n\n\/\/ dog\u69cb\u9020\u4f53\u306e\u751f\u6210\nfunc NewDog(name string) myInterface {\n\tif name == "" {\n\t\treturn nil\n\t}\n\tvar d dog\n\td.name = name\n\treturn &d\n}\n\n\/\/ nil\u5224\u5b9a\nfunc nilEquals(m myInterface) {\n\tif m == nil {\n\t\tfmt.Println("nil")\n\t} else {\n\t\tfmt.Println("Not nil")\n\t\tfmt.Println(m.getName())\n\t}\n}\n<\/code><\/pre><\/div>\n\n\n\n
panic\u306f\u767a\u751f\u3057\u306a\u304f\u306a\u308a\u307e\u3059\u3002
NewDog\u95a2\u6570\u306f\u660e\u793a\u7684\u306b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u578b\u3092\u8fd4\u5374\u3057\u307e\u3059\u3002\u3067\u3059\u306e\u3067\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306enil\u304c\u8fd4\u5374\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u578b\u3068\u5024\u304cnil\u306b\u306a\u308a\u307e\u3059\u3002\u4eca\u56de\u3001nilEquals\u95a2\u6570\u3078\u6e21\u3055\u308c\u305f\u5024\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u578b\u3068\u5024\u304cnil\u306a\u306e\u3067\u304d\u3061\u3093\u3068nil\u3068\u5224\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n
\u6700\u5f8c\u306b<\/h1>\n\n\n\n
\u3068\u306b\u304b\u304f\u3084\u3084\u3053\u3057\u304f\u3001\u8907\u96d1\u306a\u611f\u3058\u304c\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u30bc\u30ed\u5024\u306fnil\u3067\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":968,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33],"tags":[],"class_list":["post-3880","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-go"],"_links":{"self":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/3880","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3880"}],"version-history":[{"count":11,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/3880\/revisions"}],"predecessor-version":[{"id":3897,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/posts\/3880\/revisions\/3897"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=\/wp\/v2\/media\/968"}],"wp:attachment":[{"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3880"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3880"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dennie.tokyo\/it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3880"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}