{"categories":["JavaScript"],"height":"190","type":"rich","title":"async/await\u3068promise\u4f7f\u3048\u3070\u30e2\u30ca\u30c9\u7cd6\u8863\u69cb\u6587\u3063\u307d\u3044\u306e\u66f8\u3051\u305d\u3046\u3060\u3088\u306d\u3063\u3066\u601d\u3063\u3066\u66f8\u3044\u3066\u307f\u305f\u3051\u3069\u3001async () => {} \u3067wrap\u3057\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u3057\u307e\u3041\u305d\u3093\u306a\u306b\u304d\u308c\u3044\u306b\u66f8\u3051\u306a\u304b\u3063\u305f\u3063\u3066\u8a71","version":"1.0","author_url":"https://blog.hatena.ne.jp/yuroyoro/","author_name":"yuroyoro","width":"100%","description":"\u30bf\u30a4\u30c8\u30eb\u3067\u5168\u90e8\u8a00\u3044\u5207\u3063\u3066\u307e\u3059\u304c // Optional container like maybe monad class Option { constructor(value){ this.value = value } async promise() { return new Promise((resolve, reject) => { if (this.value) { resolve(this.value); } else { reject(undefined); } }); } } \u3053\u3093\u306aMaybe \u3068\u304bOptional\u3063\u307d\u3044\u3084\u3064\u3092\u7528\u610f\u3057\u307e\u3059\u3002 promise() \u3067 Promise\u3092\u2026","provider_url":"https://hatena.blog","blog_title":"( \ua4aa\u2313\ua4aa) \u3086\u308b\u3088\u308d\u65e5\u8a18","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyuroyoro.hatenablog.com%2Fentry%2F2019%2F05%2F31%2F134440\" title=\"async/await\u3068promise\u4f7f\u3048\u3070\u30e2\u30ca\u30c9\u7cd6\u8863\u69cb\u6587\u3063\u307d\u3044\u306e\u66f8\u3051\u305d\u3046\u3060\u3088\u306d\u3063\u3066\u601d\u3063\u3066\u66f8\u3044\u3066\u307f\u305f\u3051\u3069\u3001async () =&gt; {} \u3067wrap\u3057\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u3057\u307e\u3041\u305d\u3093\u306a\u306b\u304d\u308c\u3044\u306b\u66f8\u3051\u306a\u304b\u3063\u305f\u3063\u3066\u8a71 - ( \ua4aa\u2313\ua4aa) \u3086\u308b\u3088\u308d\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://yuroyoro.hatenablog.com/entry/2019/05/31/134440","image_url":null,"published":"2019-05-31 13:44:40","provider_name":"Hatena Blog","blog_url":"https://yuroyoro.hatenablog.com/"}