{"provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/nomadomama/","author_name":"nomadomama","type":"rich","description":"winCount\u3084lossCount\uff08uint16\uff09\u3001level\uff08uint32\uff09\u306b\u3064\u3044\u3066\u306f\u3001\u3053\u308c\u3089\u306e\u5f15\u6570\u3067SafeMath\u306eadd\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u3053\u308c\u3089\u306e\u30bf\u30a4\u30d7\u306fuint256\u306b\u5909\u63db\u3055\u308c\u308b\u306e\u3067\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u3092\u9632\u3052\u307e\u305b\u3093\u3002 function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } // If we call `.add` on a `uint8`, it gets converted to a `uint256`. /\u2026","width":"100%","url":"https://blockchainsyufu.hatenadiary.com/entry//cryptZombieslesson5-11","blog_url":"https://blockchainsyufu.hatenadiary.com/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblockchainsyufu.hatenadiary.com%2Fentry%2F%2FcryptZombieslesson5-11\" title=\"\u3010CryptZombies\u3011\u30ec\u30c3\u30b9\u30f3\uff15\u30c1\u30e3\u30d7\u30bf\u30fc\uff11\uff11\uff1aSafeMath\u30d1\u30fc\u30c8\uff13 - \u521d\u5fc3\u8005\u6587\u7cfb\u4e3b\u5a66\u304c\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u3092\u5b66\u3076\u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","categories":[],"image_url":"https://cdn.user.blog.st-hatena.com/default_entry_og_image/146916585/1536563836348756","version":"1.0","blog_title":"\u521d\u5fc3\u8005\u6587\u7cfb\u4e3b\u5a66\u304c\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u3092\u5b66\u3076\u30d6\u30ed\u30b0","title":"\u3010CryptZombies\u3011\u30ec\u30c3\u30b9\u30f3\uff15\u30c1\u30e3\u30d7\u30bf\u30fc\uff11\uff11\uff1aSafeMath\u30d1\u30fc\u30c8\uff13","provider_name":"Hatena Blog","published":"2018-12-29 22:49:47"}