{"type":"rich","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/goldenCat1990/","description":"\ud83d\udd27 \u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9 a = [1, 2] b = ['a', 'b'] a.product(b) # => [[1, \"a\"], [1, \"b\"], [2, \"a\"], [2, \"b\"]] \u3053\u308c\u306f\u3001a \u306e\u5404\u8981\u7d20\u3068 b \u306e\u5404\u8981\u7d20\u3092\u3059\u3079\u3066\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u30da\u30a2\u306b\u3057\u3066\u304f\u308c\u307e\u3059\u3002 \ud83e\udde9 \u914d\u5217\u304c1\u3064\u3060\u3051\u3067\u3082\u4f7f\u3048\u308b a = [1, 2, 3] a.product(a) # => [[1, 1], [1, 2], [1, 3], [2, 1], [2, 2], [2, 3], [3, 1], [3, 2], [3, 3]] \u3053\u308c\u306f\u3044\u308f\u3086\u308b\u30c7\u30ab\u30eb\u30c8\u7a4d\uff08\u76f4\u7a4d\uff09\u3067\u3059\u306d\u3002\u7d44\u307f\u5408\u308f\u305b\u3068\u3044\u3046\u3088\u308a\u9806\u5217\u306b\u8fd1\u3044\u3002 \ud83d\udd04 \u8907\u6570\u914d\u5217\u3092\u6e21\u2026","blog_url":"https://blog.jun01t.com/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.jun01t.com%2Fentry%2F2025%2F04%2F12%2F140647\" title=\"`Array#product` \u30e1\u30bd\u30c3\u30c9\u306f\u7d44\u307f\u5408\u308f\u305b\u3092\u4f5c\u308b\u6642\u306b\u4fbf\u5229 - jun01t\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"`Array#product` \u30e1\u30bd\u30c3\u30c9\u306f\u7d44\u307f\u5408\u308f\u305b\u3092\u4f5c\u308b\u6642\u306b\u4fbf\u5229","published":"2025-04-12 14:06:47","width":"100%","provider_name":"Hatena Blog","blog_title":"jun01t\u306e\u65e5\u8a18","categories":["\u6280\u8853"],"image_url":null,"version":"1.0","height":"190","url":"https://blog.jun01t.com/entry/2025/04/12/140647","author_name":"goldenCat1990"}