{"published":"2018-10-25 16:55:20","type":"rich","categories":[],"url":"https://nekogata.hatenablog.com/entry/2018/10/25/165520","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/nkgt_chkonk/","blog_url":"https://nekogata.hatenablog.com/","image_url":null,"height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnekogata.hatenablog.com%2Fentry%2F2018%2F10%2F25%2F165520\" title=\"can&#39;t add a new key into hash during iteration\u304c\u8b0e\u306e\u72b6\u6cc1\u3067\u767a\u751f\u3057\u3066\u3044\u308b\u3088\u3046\u306b\u898b\u3048\u308b\u3068\u304d\u306f - \u732b\u578b\u306e\u84c4\u97f3\u6a5f\u306f 1 \u5206\u9593\u306b 45 \u56de\u306b\u3083\u3042\u3068\u9cf4\u304f\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","version":"1.0","provider_url":"https://hatena.blog","width":"100%","author_name":"nkgt_chkonk","title":"can't add a new key into hash during iteration\u304c\u8b0e\u306e\u72b6\u6cc1\u3067\u767a\u751f\u3057\u3066\u3044\u308b\u3088\u3046\u306b\u898b\u3048\u308b\u3068\u304d\u306f","blog_title":"\u732b\u578b\u306e\u84c4\u97f3\u6a5f\u306f 1 \u5206\u9593\u306b 45 \u56de\u306b\u3083\u3042\u3068\u9cf4\u304f","description":"\u3069\u306e\u3088\u3046\u306a\u554f\u984c\u304b \u3055\u3044\u304d\u3093\u306eruby\u3067\u306f\u3001Hash\u306eiteration\u4e2d\u306bhash\u306b\u7834\u58ca\u7684\u306a\u5909\u66f4\u3068\u3057\u3066\u65b0\u3057\u3044key\u3092\u633f\u5165\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001can't add a new key into hash during iteration \u3068\u3044\u3046RuntimeError\u3092\u3042\u3052\u3066\u304f\u308c\u307e\u3059\u3002 \u30b3\u30fc\u30c9\uff1a # nyan.rb def iterate_hash_and_insert_key(hash) hash.each do |k, v| hash[:new_key] = :new_value end end hash = {a: :b} iterate_hash_and_insert_key(hash) \u30b9\u30bf\u2026"}