{"blog_title":"MEMO:\u306f\u3066\u306a\u652f\u5e97","published":"2007-12-14 00:00:01","categories":["Haskell"],"provider_name":"Hatena Blog","type":"rich","title":"\u7a7a\u30ea\u30b9\u30c8\u306e\u30a8\u30e9\u30fc","blog_url":"https://katona.hatenadiary.org/","version":"1.0","provider_url":"https://hatena.blog","author_name":"katona","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkatona.hatenadiary.org%2Fentry%2F20071214%2Fp2\" title=\"\u7a7a\u30ea\u30b9\u30c8\u306e\u30a8\u30e9\u30fc - MEMO:\u306f\u3066\u306a\u652f\u5e97\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"haskell\u306e\u578b\u3067\u30cf\u30de\u3063\u305f\u4e8b\u4f8b\u305d\u306e3 main = print []\u3053\u308c\u3092\u5b9f\u884c\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30a8\u30e9\u30fc\u306b\u306a\u308b\u3002 Ambiguous type variable `a' in the constraint: `Show a' arising from use of `print' at a.hs:1:7-11 Probable fix: add a type signature that fixes these type variable(s)[]\u306f[a]\u578b\u306e\u5024\u3060\u304c\u3001\u4e2d\u8eab\u306e\u5024\u304c\u4e00\u3064\u3082\u306a\u3044\u306e\u3067\u578b\u5909\u6570a\u306e\u578b\u304c\u63a8\u8ad6\u51fa\u6765\u306a\u3044\u306e\u304c\u6c17\u306b\u5165\u3089\u306a\u3044\u3088\u3046\u3060\u3002 \u306a\u306e\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5177\u4f53\u7684\u306a\u578b\u3092\u6c7a\u3081\u3066\u3084\u308b\u3068\u6587\u53e5\u3092\u8a00\u2026","author_url":"https://blog.hatena.ne.jp/katona/","height":"190","url":"https://katona.hatenadiary.org/entry/20071214/p2","width":"100%","image_url":null}