{"categories":["javascript"],"image_url":null,"description":"\u3055\u304f\u3063\u3068\u4e71\u6570\u304c\u6b32\u3057\u3044\u6642\u306b\u3044\u3064\u3082\u65b9\u6cd5\u3092\u5fd8\u308c\u308b\u306e\u3067\u30e1\u30e2\u3002 Math.random\u306f0\u4ee5\u4e0a1\u672a\u6e80\u306eNumber\u3092\u8fd4\u3059\u3002 0\u4ee5\u4e0a4\u672a\u6e80\u306e\u4e71\u6570\u3092\u5f97\u305f\u3051\u308c\u3070Math.random() * 4\u3068\u3059\u308b\u3002\u6574\u6570\u3068\u3057\u3066\u6b32\u3057\u3051\u308c\u3070Math.floor\u3092\u4f7f\u3046\u3002 3\u4ee5\u4e0a7\u672a\u6e80\u306f0\u4ee5\u4e0a4(=7-3)\u672a\u6e80\u306b3\u3092\u8db3\u305b\u3070OK\u3002 0\u4ee5\u4e0a4\u4ee5\u4e0b\u306e\u5834\u5408\u306f\uff1f \u6574\u6570\u3067\u3088\u3051\u308c\u30705\u672a\u6e80\u3068\u540c\u3058\u306a\u306e\u3067Math.floor(Math.random() * 5)\u3067OK\u3002 \u6574\u6570\u3067\u306a\u3044\u5834\u5408\u3001\u4f8b\u3048\u30700\u4ee5\u4e0a4.5\u4ee5\u4e0b\u3068\u304b\u306f\uff1fMath.random() * 4.5\u3067\u306f4.5\u306b\u306a\u3089\u306a\u3044\u3002 4.5 * 100000 = 4500000\u306a\u306e\u3067\u30014500000\u4ee5\u4e0b\u306e\u6574\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fgct.hatenadiary.org%2Fentry%2F20100802%2F1280727003\" title=\"JavaScript\u3067\u306e\u4e71\u6570\u30e1\u30e2 - \u3064\u307e\u307f\u3050\u3044\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>","published":"2010-08-02 14:30:03","title":"JavaScript\u3067\u306e\u4e71\u6570\u30e1\u30e2","type":"rich","blog_title":"\u3064\u307e\u307f\u3050\u3044\u30e1\u30e2","author_name":"gct","author_url":"https://blog.hatena.ne.jp/gct/","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","url":"https://gct.hatenadiary.org/entry/20100802/1280727003","blog_url":"https://gct.hatenadiary.org/","height":"190","width":"100%","version":"1.0"}