{"description":"\u3053\u306e\u8a18\u4e8b\u306f\u3001\u304b\u3064\u3066TypeScript\u3067\u898b\u304b\u3051\u308b\u8a18\u6cd5\u304c\u4f55\u3068\u547c\u3076\u306e\u304b\u3059\u3089\u5206\u304b\u3089\u305a\u56f0\u3063\u3066\u3044\u305f\u9803\u306e\u81ea\u5206\u3078\u5411\u3051\u3066\u9001\u308b\u3082\u306e\u3067\u3059\u304c\u3001\u73fe\u5728TypeScript\u3078\u5165\u9580\u4e2d\u306e\u65b9\u3005\u306b\u3082\u5f79\u7acb\u3064\u304b\u306a\u3068\u601d\u3044\u516c\u958b\u3059\u308b\u6b21\u7b2c\u3067\u3059\u3002\u6b63\u78ba\u306a\u5185\u5bb9\u306b\u95a2\u3057\u3066\u306f\u305c\u3072\u516c\u5f0f\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 \u5185\u5bb9\u306e\u4fee\u6b63\u3084\u9805\u76ee\u306e\u8ffd\u52a0\u306a\u3069\u306f\u968f\u6642\u627f\u308a\u307e\u3059\u3002 Type Annotation \u3053\u3093\u306a\u5974 let foo: number foo = 777 // OK foo = 'hoge' // \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc \u65e5\u672c\u8a9e\u3067\u306e\u547c\u3073\u540d \u578b\u6ce8\u91c8 \u578b\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3 \u3075\u308f\u3063\u3068\u7d39\u4ecb \u5024\u3092\u521d\u3081\u3066\u5b9a\u7fa9\u3059\u308b\u969b\u306b\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002 \u5024\u306b\u521d\u671f\u5024\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u306f\u578b\u63a8\u8ad6\u304c\u50cd\u304d\u3001let foo = \u2026","author_name":"gutcho","categories":["TypeScript"],"blog_url":"https://chomdev.hateblo.jp/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fchomdev.hateblo.jp%2Fentry%2F20170923%2F1506148900\" title=\"TypeScript\u5165\u9580\u8005\u304c\u30cf\u30de\u308a\u304c\u3061\u306a\u8a18\u6cd5(\u6587\u6cd5)\u306e\u547c\u3073\u65b9\u3068\u7c21\u6613\u89e3\u8aac\u307e\u3068\u3081 - \u3050\u3063\u3061\u3087\u3080\u306e\u958b\u767a\u306b\u3063\u304d\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/gutcho/","provider_url":"https://hatena.blog","height":"190","type":"rich","published":"2017-09-23 15:41:40","image_url":null,"provider_name":"Hatena Blog","blog_title":"\u3050\u3063\u3061\u3087\u3080\u306e\u958b\u767a\u306b\u3063\u304d","width":"100%","title":"TypeScript\u5165\u9580\u8005\u304c\u30cf\u30de\u308a\u304c\u3061\u306a\u8a18\u6cd5(\u6587\u6cd5)\u306e\u547c\u3073\u65b9\u3068\u7c21\u6613\u89e3\u8aac\u307e\u3068\u3081","url":"https://chomdev.hateblo.jp/entry/20170923/1506148900","version":"1.0"}