{"image_url":null,"width":"100%","blog_url":"https://ishiduca.hatenablog.com/","type":"rich","author_url":"https://blog.hatena.ne.jp/ishiduca/","blog_title":".blog","version":"1.0","description":"function F (opt) { this.a = opt.a } function test (opt) { try { console.log(new F(opt)) } catch (err) { return console.error(err) } } test() // [TypeError: Cannot read property 'a' of undefined] test(null) // [TypeError: Cannot read property 'a' of null] test('foo') // {a: undefined} test(1) // {a: \u2026","url":"https://ishiduca.hatenablog.com/entry/2013/10/24/200510","author_name":"ishiduca","categories":[],"title":"\u5f15\u6570\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u30cf\u30c3\u30b7\u30e5\uff09\u3092\u60f3\u5b9a\u3057\u3066\u3044\u3066\u3001\u60f3\u5b9a\u3057\u3066\u3044\u306a\u3044\u578b\u306e\u5024\u3092\u6e21\u3057\u3066\u3082\u30a8\u30e9\u30fc\u304c\u6295\u3052\u3089\u308c\u306a\u3044\u3053\u3068\u3082\u3042\u308b\u3002","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fishiduca.hatenablog.com%2Fentry%2F2013%2F10%2F24%2F200510\" title=\"\u5f15\u6570\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u30cf\u30c3\u30b7\u30e5\uff09\u3092\u60f3\u5b9a\u3057\u3066\u3044\u3066\u3001\u60f3\u5b9a\u3057\u3066\u3044\u306a\u3044\u578b\u306e\u5024\u3092\u6e21\u3057\u3066\u3082\u30a8\u30e9\u30fc\u304c\u6295\u3052\u3089\u308c\u306a\u3044\u3053\u3068\u3082\u3042\u308b\u3002 - .blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2013-10-24 20:05:10"}