{"provider_url":"https://hatena.blog","type":"rich","image_url":null,"height":"190","title":"P14 (*) \u30ea\u30b9\u30c8\u306e\u5404\u8981\u7d20\u30922\u9023\u7d9a\u3055\u305b\u308b\u3002","provider_name":"Hatena Blog","categories":["Python","L-99"],"author_url":"https://blog.hatena.ne.jp/yoshiyoshifujii/","width":"100%","description":"def dupli(lista): return reduce(lambda x,y: x+[y,y], lista, []) if isinstance(lista, list) else None if __name__ == \"__main__\": print dupli(\"a\") == None print dupli([]) == [] print dupli([\"a\"]) == [\"a\", \"a\"] print dupli([\"a\", \"b\"]) == [\"a\", \"a\", \"b\", \"b\"] print dupli([\"a\", \"b\", \"c\"]) == [\"a\", \"a\", \"\u2026","author_name":"yoshiyoshifujii","blog_url":"https://yoshiyoshifujii.hatenablog.com/","blog_title":"\u6bce\u65e5Learning","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyoshiyoshifujii.hatenablog.com%2Fentry%2F20100728%2Fp3\" title=\"P14 (*) \u30ea\u30b9\u30c8\u306e\u5404\u8981\u7d20\u30922\u9023\u7d9a\u3055\u305b\u308b\u3002 - \u6bce\u65e5Learning\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://yoshiyoshifujii.hatenablog.com/entry/20100728/p3","version":"1.0","published":"2010-07-28 00:00:02"}