{"type":"rich","image_url":"https://m.media-amazon.com/images/I/51S38UhjBAL._SL500_.jpg","categories":["TypeScript","JavaScript"],"provider_url":"https://hatena.blog","width":"100%","published":"2022-12-09 08:30:00","description":"JavaScript \u3067\u914d\u5217\u304b\u3089 Falsy \u306a\u5024\u3092\u30d5\u30a3\u30eb\u30bf\u30fc\u3059\u308b\u969b\u306b Array.filter(Boolean) \u3092\u3088\u304f\u4f7f\u3063\u3066\u3044\u305f\u306e\u3067\u3059\u304c TypeScript \u3060\u3068\u578b\u304c\u3046\u307e\u304f\u63a8\u8ad6\u3055\u308c\u306a\u304b\u3063\u305f\u306e\u3067 TypeScript \u3067\u914d\u5217\u304b\u3089 Falsy \u306a\u5024\u3092\u53d6\u308a\u9664\u304f\u65b9\u6cd5\u3092\u8abf\u3079\u3066\u305f\u30e1\u30e2 \u7d50\u8ad6 TypeScript \u306b\u306f is \u306f\u3042\u308b\u304c\u3001\u3007\u3007\u4ee5\u5916 NOR \u3092\u8868\u3059\u3082\u306e\u304c\u306a\u3044 TypeScript \u306b\u306f\u73fe\u72b6 (v4.9.3 \u73fe\u5728) NaN \u3092\u8868\u3059\u578b\u304c\u7121\u3044\u306e\u3067 .filter(Boolean) \u306e\u7d50\u679c\u3092\u578b\u60c5\u5831\u306b\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u304b\u3063\u305f\uff08NaN \u306f\u3042\u304f\u307e\u3067 number \u578b\uff09 \u6697\u9ed9\u7684\u306a Falsy \u306f 0 \u304c\u524a\u9664\u2026","provider_name":"Hatena Blog","version":"1.0","author_name":"kikiki-kiki","url":"https://chaika.hatenablog.com/entry/2022/12/09/083000","blog_title":"\u304b\u3082\u30e1\u30e2","title":"TypeScript \u914d\u5217\u304b\u3089 Falsy \u306a\u5024\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3057\u305f\u3044\u2026\u3057\u305f\u304b\u3063\u305f\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fchaika.hatenablog.com%2Fentry%2F2022%2F12%2F09%2F083000\" title=\"TypeScript \u914d\u5217\u304b\u3089 Falsy \u306a\u5024\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3057\u305f\u3044\u2026\u3057\u305f\u304b\u3063\u305f\u2026 - \u304b\u3082\u30e1\u30e2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://chaika.hatenablog.com/","author_url":"https://blog.hatena.ne.jp/kikiki-kiki/","height":"190"}