{"url":"https://inamori.hateblo.jp/entry/20061209/p1","blog_url":"https://inamori.hateblo.jp/","title":"JScript\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u901f\u5ea6/join\uff083\uff09","blog_title":"inamori\u2019s diary","published":"2006-12-09 00:00:00","categories":["JavaScript"],"height":"190","provider_name":"Hatena Blog","author_name":"inamori","type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finamori.hateblo.jp%2Fentry%2F20061209%2Fp1\" title=\"JScript\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u901f\u5ea6/join\uff083\uff09 - inamori\u2019s diary\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"author_url":"https://blog.hatena.ne.jp/inamori/","provider_url":"https://hatena.blog","version":"1.0","description":"Array\u306b\u306f\u9577\u30551\u306e\u6587\u5b57\u5217\u304c2n\u500b\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u3068\u3059\u308b\u3002 \u3053\u308c\u3092\u9806\u306b\u7d50\u5408\u3057\u3066\u3044\u304f\u3068\u3059\u308b\u3002 \u7d50\u5408\u306b\u304b\u304b\u308b\u6642\u9593\u306f\u3001\u7d50\u5408\u3055\u308c\u305f\u7d50\u679c\u306e\u6587\u5b57\u5217\u306e\u9577\u3055\u306b\u6bd4\u4f8b\u3057\u3001 \u9577\u3055\u304c1\u306a\u3089\u5358\u4f4d\u6642\u9593\u304b\u304b\u308b\u3068\u3059\u308b\u3002 \u3059\u3079\u3066\u306e\u7d50\u5408\u306b\u304b\u304b\u308b\u6642\u9593\u306f\u3001 2 + ... + 2n = 2n-1(2n + 1) - 1 \u3068\u306a\u308b\u3002 \u5225\u306e\u65b9\u6cd5\u3092\u8003\u3048\u308b\u3002 \u307e\u305a\u9577\u30552\u306e\u6587\u5b57\u5217\u3092\u3056\u3063\u3068\u4f5c\u3063\u3066\u3001\u6b21\u306b\u9577\u30554\u306e\u6587\u5b57\u5217\u3092\u4f5c\u3063\u3066\u3001 \u3068\u3044\u3046\u65b9\u6cd5\u3002 \"a\" + \"b\" + \"c\" + \"d\" = \"ab\" + \"cd\" = \"abcd\" \u3068\u3044\u3046\u5177\u5408\u3002 \u3053\u308c\u3060\u3068\u3001\u304b\u304b\u308b\u6642\u9593\u306f\u3001 n2n \u3068\u3044\u3046\u308f\u3051\u3067\u30012n-1 \u3068 n\u306e\u6bd4\u8f03\u306b\u306a\u308a\u3001 \u5727\u5012\u7684\u306b\u5f8c\u8005\u306e\u307b\u3046\u304c\u901f\u3044\u3068\u2026","width":"100%"}