{"id":13431,"date":"2021-05-08T09:10:09","date_gmt":"2021-05-08T00:10:09","guid":{"rendered":"http:\/\/www.code-magagine.com\/?p=13431"},"modified":"2023-05-27T20:53:46","modified_gmt":"2023-05-27T11:53:46","slug":"%e3%80%90javascript%e3%80%91%e8%aa%a4%e5%b7%ae%e3%81%ab%e3%81%a4%e3%81%84%e3%81%a6","status":"publish","type":"post","link":"http:\/\/www.code-magagine.com\/?p=13431","title":{"rendered":"\u3010JavaScript\u3011\u4e38\u3081\u8aa4\u5dee\u306b\u3064\u3044\u3066"},"content":{"rendered":"<p>JavaScript\u3067\u306f\u5c0f\u6570\u70b9\u540c\u58eb\u306e\u56db\u5247\u6f14\u7b97\u306a\u3069\u3092\u3059\u308b\u5834\u5408\u306f\u8aa4\u5dee\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true\">10.1 - 5.2 \/\/ \u300c4.8999999999999995\u300d\u306b\u306a\u308b\u3002\r\n0.1 + 0.2 \/\/ \u3000\u300c0.30000000000000004\u300d\u306b\u306a\u308b\u3002\r\n0.571*100 \/\/ \u300c57.099999999999994\u300d\u306b\u306a\u308b\u3002<\/pre>\n<h2>\u539f\u56e0<\/h2>\n<p>\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u5185\u90e8\u3067\u767a\u751f\u3059\u308b<span style=\"color: #ff0000;\"><strong>\u300c\u4e38\u3081\u8aa4\u5dee\u300d<\/strong><\/span>\u3068\u3044\u3046\u3082\u306e\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u5185\u90e8\u3067\u306f\u5c0f\u6570\u70b9(\u6d6e\u52d5\u5c0f\u6570\u70b9)\u306f2\u9032\u6570\u3067\u8a08\u7b97\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u4eba\u304c\u6271\u3046\u306e\u306f10\u9032\u6570\u306b\u306a\u308a\u307e\u3059\u300210\u9032\u6570\u21922\u9032\u6570\u306b\u3046\u307e\u304f\u5909\u63db\u3067\u304d\u306a\u3044\u3053\u3068\u3067\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<h2>\u5bfe\u51e6\u65b9\u6cd51\uff1a\u6574\u6570\u306b\u3057\u3066\u304b\u3089\u8a08\u7b97\u3059\u308b\u3002<\/h2>\n<p>\u3053\u308c\u3067\u3082\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3001\u5c0f\u6570\u70b9\u306e\u6841\u6570\u304c\u308f\u304b\u3063\u3066\u3044\u308b\u5834\u5408\u3057\u304b\u5bfe\u5fdc\u3067\u304d\u307e\u305b\u3093\u3002\uff08\u305f\u3060\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306a\u3069\u306f\u4e0d\u8981\u306a\u5bfe\u51e6\u6cd5\u306b\u306a\u308b\u306e\u3067\u5c40\u6240\u7684\u306a\u66ab\u5b9a\u7684\u306a\u5bfe\u5fdc\u3068\u304b\u3067\u306f\u3053\u308c\u3067\u554f\u984c\u306a\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\uff09<\/p>\n<pre class=\"lang:default decode:true\">aaa = 10.7;\r\nbbb = 9.1;\r\nccc = ((aaa\u3000*10) - (bbb * 10)) \/ 10; \/\/ 1.6<\/pre>\n<p>\u4e0a\u8a18\u306e\u3088\u3046\u306b10\u500d\u3057\u3066\u6574\u6570\u306b\u3057\u3066\u304b\u3089\u8a08\u7b97\u3057\u3066\u307e\u305f10\u3067\u5272\u3063\u3066\u3044\u307e\u3059\u3002\u307e\u3042\u5197\u9577\u3067\u3059\u3088\u306d\u3002<\/p>\n<p>\u307e\u305f\u3001\u4e0a\u8a18\u306e\u30b1\u30fc\u30b9\u3067\u306f\u3046\u307e\u304f\u3044\u304d\u307e\u3059\u304c\u5c0f\u6570\u7b2c\u4e8c\u4f4d\u306a\u3069\u3092\u4f7f\u3063\u305f\u6d6e\u52d5\u5c0f\u6570\u306a\u3069\u3092\u6271\u3046\u5834\u5408\u306f\u5c0f\u6570\u8a08\u7b97\u306a\u3069\u304c\u5165\u3063\u3066\u304d\u3066\u3046\u307e\u304f\u3044\u304b\u306a\u3044\u5834\u5408\u304c\u3042\u308b\u306e\u3067\u78ba\u5b9f\u3067\u306f\u306a\u3044\u3067\u3059\u3002<\/p>\n<h2>\u5bfe\u51e6\u65b9\u6cd52\uff1a\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3046\u3002<\/h2>\n<p>\u4e38\u3081\u8aa4\u5dee\u5bfe\u7b56\u306e\u30e1\u30b8\u30e3\u30fc\u306a\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u4e0b\u8a18\u306e\u3088\u3046\u306a\u3082\u306e\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>BigDecimal.js<\/li>\n<li>bigNumber.js<\/li>\n<li>big.js<\/li>\n<li>decimal.js<\/li>\n<\/ul>\n<h3>big.js<\/h3>\n<ul>\n<li>6kb\u3068\u30b5\u30a4\u30ba\u306f\u5c0f\u3055\u3044<\/li>\n<li>ES3\u3067\u3082\u52d5\u4f5c\u3059\u308b\u306e\u3067babel\u306a\u3069\u3067\u306e\u5909\u63db\u306f\u4e0d\u8981<\/li>\n<\/ul>\n<h3>bigNumber.js<\/h3>\n<ul>\n<li>8kb\u3068\u30b5\u30a4\u30ba\u306f\u5c0f\u3055\u3044<\/li>\n<\/ul>\n<pre class=\"lang:default decode:true\">const BigNumber = require('.\/bignumber.js');\r\nconst aaa = new BigNumber(0.2).minus(0.1);\r\nconsole.log(aaa.toString()); \/\/ \u4e38\u3081\u8aa4\u5dee\u3092\u8d77\u3053\u3055\u305a0.1\u306b\u306a\u308b\u3002\r\n<\/pre>\n<h3>decimal.js<\/h3>\n<ul>\n<li>typescript\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u3002<\/li>\n<li>\u8907\u96d1\u306a\u6570\u5b66\u7684\u306a\u8a08\u7b97\u3092\u884c\u3046\u5834\u5408\u306f\u3053\u308c\u3092\u4f7f\u3046\u3002<\/li>\n<\/ul>\n<h2>\u5bfe\u51e6\u65b9\u6cd53\uff1a\u6f14\u7b97\u3092\u4ed6\u306e\u8a00\u8a9e\u3067\u884c\u3046\u3002<\/h2>\n<p>\u305d\u3082\u305d\u3082\u3001\u5c0f\u6570\u70b9\u8a08\u7b97\u306f\u30d0\u30c3\u30af\u30a8\u30f3\u30c9 \u306a\u3069\u306e\u8a00\u8a9e\uff08\u4f8b\u3048\u3070\u3001Java\u3084SQL\u306a\u3069\uff09\u306b\u4efb\u305b\u3066\u30d5\u30ed\u30f3\u30c8\u3067\u306f\u6f14\u7b97\u51e6\u7406\u3092\u3057\u306a\u3044\u3068\u3044\u3046\u8003\u3048\u65b9\u3067\u3059\u306d\u3002<\/p>\n<p>\u7279\u306b\u3001\u91d1\u878d\u7cfb\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3068\u304b\u3067\u3042\u308c\u3070\u306a\u304a\u3055\u3089\u7cbe\u5bc6\u306a\u304a\u91d1\u306e\u91d1\u984d\u306e\u6271\u3044\u304c\u8981\u6c42\u3055\u308c\u308b\u3067\u3057\u3087\u3046\u304b\u3089\u3053\u306e\u9078\u629e\u80a2\u3092\u53d6\u308b\u3053\u3068\u304c\u30d9\u30b9\u30c8\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"JavaScript\u3067\u306f\u5c0f\u6570\u70b9\u540c\u58eb\u306e\u56db\u5247\u6f14\u7b97\u306a\u3069\u3092\u3059\u308b\u5834\u5408\u306f\u8aa4\u5dee\u304c\u767a\u751f\u3057\u307e\u3059\u3002 10.1 - 5.2 \/\/ \u300c4.8999999999999995\u300d\u306b\u306a\u308b\u3002 0.1 + 0.2 \/\/ \u3000\u300c0.30000000000000 [&hellip;]","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[16],"tags":[],"_links":{"self":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/13431"}],"collection":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13431"}],"version-history":[{"count":7,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/13431\/revisions"}],"predecessor-version":[{"id":20275,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=\/wp\/v2\/posts\/13431\/revisions\/20275"}],"wp:attachment":[{"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13431"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13431"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.code-magagine.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}