{"id":10,"date":"2012-11-19T10:27:11","date_gmt":"2012-11-19T10:27:11","guid":{"rendered":"http:\/\/www.dongcb.com\/?p=10"},"modified":"2012-11-19T10:27:11","modified_gmt":"2012-11-19T10:27:11","slug":"js%e5%b0%8f%e6%95%b0%e8%ae%a1%e7%ae%97%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"https:\/\/www.dongchangbin.net.cn\/?p=10","title":{"rendered":"JS\u5c0f\u6570\u8ba1\u7b97\u95ee\u9898"},"content":{"rendered":"

displaynum()\u51fd\u6570<\/p>\n

\n
function displaynum()\n{\nvar num = 22.77;\nalert(num + 10);\n}<\/pre>\n<\/div>\n
\u70b9\u51fbShow\u6309\u94ae \u7ed3\u679c\u663e\u793a32.769999999996 \u51fa\u73b0\u4e86N\u591a\u5c0f\u6570.<\/p>\n
\u4e5f\u5e76\u4e0d\u662f\u6240\u6709\u6570\u5b57\u90fd\u4f1a\u51fa\u73b0\u8fd9\u79cd\u73b0\u8c61, \u9664\u4e86 22.99 \u00a02.777 , \u597d\u50cf\u8fd9\u51e0\u4e2a\u6570\u5b57\u4e5f\u6ca1\u4ec0\u4e48\u7279\u6b8a.<\/p>\n
\u67e5\u4e86\u4e00\u4e9b\u8d44\u6599, \u4e00\u662fJS\u6d6e\u70b9\u6570\u8ba1\u7b97\u7684bug, \u53e6\u4e00\u4e2a\u662f\u548c\u8ba1\u7b97\u673a\u6700\u7ec8\u8f6c\u6362\u6210\u4e8c\u8fdb\u5236\u8ba1\u7b97\u6709\u5173\u7cfb, \u4f46\u662f\u4e3a\u4ec0\u4e48\u4e0d\u662f\u6240\u6709\u5c0f\u6570\u90fd\u4f1a\u6709\u8fd9\u79cd\u73b0\u8c61, \u76ee\u524d\u6211\u4e5f\u4e0d\u6e05\u695a, \u6709\u65f6\u95f4\u518d\u53bb\u6df1\u5165\u7814\u7a76\u4e00\u4e0b\u3002<\/p>\n
\u73b0\u5728\u6709\u4e24\u79cd\u89e3\u51b3\u65b9\u6cd5, \u7b2c\u4e00\u79cd\u5c31\u662f\u5229\u7528JS .toFixed(n) \u65b9\u6cd5, \u76f4\u63a5\u83b7\u53d6n\u4f4d\u5c0f\u6570, \u4e2a\u4eba\u89c9\u5f97\u8fd9\u79cd\u65b9\u6cd5\u5728\u6570\u636e\u7cbe\u5ea6\u4e0a\u4f1a\u6709\u4e00\u4e9b\u95ee\u9898. \u5982\u679c\u6570\u636e\u7cbe\u5ea6\u8981\u6c42\u4e0d\u9ad8\u7684\u8bdd \u53ef\u4ee5\u4f7f\u7528. \u7b2c\u4e8c\u79cd\u65b9\u6cd5\u5c31\u662f\u81ea\u5df1\u5199js \u8fd0\u7b97\u65b9\u6cd5.<\/p>\n
\u4ee5\u4e0b\u662f\u81ea\u5b9a\u4e49\u52a0\u6cd5\u51fd\u6570, \u4f7f\u7528\u6b64\u65b9\u6cd5\u8fdb\u884c\u76f8\u52a0\u4f1a\u907f\u514d\u4e0a\u9762\u95ee\u9898\u3002<\/p>\n
\n
function addNum(num1,num2){
\nvar sq1,sq2,m;
\ntry{sq1=num1.toString().split(“.”)[1].length;} catch(e){sq1=0;}
\ntry{sq2=num2.toString().split(“.”)[1].length;} catch(e){sq2=0;}<\/p>\n
m=Math.pow(10,Math.max(sq1,sq2));
\nreturn ( num1 * m + num2 * m ) \/ m;
\n}<\/p>\n<\/div>\n
\u5f53\u7136\u7b80\u5355\u4e00\u70b9\u4e5f\u53ef\u4ee5\u5199\u6210\u00a0alert((num * 3\u00a0+\u00a010 * 3) \/3); \u8fd9\u6837\u4e5f\u4e0d\u4f1a\u51fa\u73b0n\u591a\u5c0f\u6570\u3002<\/p>\n
alert((num * 3\u00a0+\u00a010 * 3) \/3); \u4e0e\u00a0alert(num\u00a0+\u00a010); \u8fd9\u4e24\u79cd\u5199\u6cd5\u8ba1\u7b97\u673a\u5728\u5e95\u5c42\u8f6c\u6362\u6210\u4e8c\u8fdb\u5236\u8fd0\u7b97\u662f\u6709\u533a\u522b\u7684, \u6216\u8bb8\u8fd9\u5c31\u662f\u51fa\u73b0\u4e0a\u8ff0\u95ee\u9898\u7684\u539f\u56e0\uff0c\u8fd8\u6709\u5f85\u6211\u53bb\u6df1\u5165\u7814\u7a76.<\/p>\n
\u56ed\u5b50\u91cc\u7684\u9ad8\u624b\u6709\u77e5\u9053\u7684, \u8fd8\u8bf7\u8d50\u6559 O(\u2229_\u2229)O\uff5e\uff5e!<\/p>\n","protected":false},"excerpt":{"rendered":"
displaynum()\u51fd\u6570 function displaynum() { var num = 22.77; […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-10","post","type-post","status-publish","format-standard","hentry","category-blog-my-blog"],"yoast_head":"\nJS\u5c0f\u6570\u8ba1\u7b97\u95ee\u9898 - Dong's Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dongchangbin.net.cn\/?p=10\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JS\u5c0f\u6570\u8ba1\u7b97\u95ee\u9898 - Dong's Blog\" \/>\n<meta property=\"og:description\" content=\"displaynum()\u51fd\u6570 function displaynum() { var num = 22.77; […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dongchangbin.net.cn\/?p=10\" \/>\n<meta property=\"og:site_name\" content=\"Dong's Blog\" \/>\n<meta property=\"article:published_time\" content=\"2012-11-19T10:27:11+00:00\" \/>\n<meta name=\"author\" content=\"Dong\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dong\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.dongchangbin.net.cn\/?p=10#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.dongchangbin.net.cn\/?p=10\"},\"author\":{\"name\":\"Dong\",\"@id\":\"https:\/\/www.dongchangbin.net.cn\/#\/schema\/person\/1420649ce898d888fea55ef4fa6e8fae\"},\"headline\":\"JS\u5c0f\u6570\u8ba1\u7b97\u95ee\u9898\",\"datePublished\":\"2012-11-19T10:27:11+00:00\",\"dateModified\":\"2012-11-19T10:27:11+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.dongchangbin.net.cn\/?p=10\"},\"wordCount\":59,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.dongchangbin.net.cn\/#\/schema\/person\/1420649ce898d888fea55ef4fa6e8fae\"},\"articleSection\":[\"Blog my Blog\"],\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.dongchangbin.net.cn\/?p=10#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.dongchangbin.net.cn\/?p=10\",\"url\":\"https:\/\/www.dongchangbin.net.cn\/?p=10\",\"name\":\"JS\u5c0f\u6570\u8ba1\u7b97\u95ee\u9898 - Dong's Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.dongchangbin.net.cn\/#website\"},\"datePublished\":\"2012-11-19T10:27:11+00:00\",\"dateModified\":\"2012-11-19T10:27:11+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.dongchangbin.net.cn\/?p=10#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.dongchangbin.net.cn\/?p=10\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.dongchangbin.net.cn\/?p=10#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.dongchangbin.net.cn\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"JS\u5c0f\u6570\u8ba1\u7b97\u95ee\u9898\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.dongchangbin.net.cn\/#website\",\"url\":\"https:\/\/www.dongchangbin.net.cn\/\",\"name\":\"Dong's Blog\",\"description\":\"\u6162\u6162\u6765\uff0c\u6bd4\u8f83\u5feb\",\"publisher\":{\"@id\":\"https:\/\/www.dongchangbin.net.cn\/#\/schema\/person\/1420649ce898d888fea55ef4fa6e8fae\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.dongchangbin.net.cn\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"zh-Hans\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\/\/www.dongchangbin.net.cn\/#\/schema\/person\/1420649ce898d888fea55ef4fa6e8fae\",\"name\":\"Dong\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.dongchangbin.net.cn\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/3d0ac155d3e1aba6eca6a0a2bb3cdba1?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/3d0ac155d3e1aba6eca6a0a2bb3cdba1?s=96&d=mm&r=g\",\"caption\":\"Dong\"},\"logo\":{\"@id\":\"https:\/\/www.dongchangbin.net.cn\/#\/schema\/person\/image\/\"},\"url\":\"https:\/\/www.dongchangbin.net.cn\/?author=1\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"JS\u5c0f\u6570\u8ba1\u7b97\u95ee\u9898 - Dong's Blog","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.dongchangbin.net.cn\/?p=10","og_locale":"zh_CN","og_type":"article","og_title":"JS\u5c0f\u6570\u8ba1\u7b97\u95ee\u9898 - Dong's Blog","og_description":"displaynum()\u51fd\u6570 function displaynum() { var num = 22.77; […]","og_url":"https:\/\/www.dongchangbin.net.cn\/?p=10","og_site_name":"Dong's Blog","article_published_time":"2012-11-19T10:27:11+00:00","author":"Dong","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"Dong"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.dongchangbin.net.cn\/?p=10#article","isPartOf":{"@id":"https:\/\/www.dongchangbin.net.cn\/?p=10"},"author":{"name":"Dong","@id":"https:\/\/www.dongchangbin.net.cn\/#\/schema\/person\/1420649ce898d888fea55ef4fa6e8fae"},"headline":"JS\u5c0f\u6570\u8ba1\u7b97\u95ee\u9898","datePublished":"2012-11-19T10:27:11+00:00","dateModified":"2012-11-19T10:27:11+00:00","mainEntityOfPage":{"@id":"https:\/\/www.dongchangbin.net.cn\/?p=10"},"wordCount":59,"commentCount":0,"publisher":{"@id":"https:\/\/www.dongchangbin.net.cn\/#\/schema\/person\/1420649ce898d888fea55ef4fa6e8fae"},"articleSection":["Blog my Blog"],"inLanguage":"zh-Hans","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.dongchangbin.net.cn\/?p=10#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.dongchangbin.net.cn\/?p=10","url":"https:\/\/www.dongchangbin.net.cn\/?p=10","name":"JS\u5c0f\u6570\u8ba1\u7b97\u95ee\u9898 - Dong's Blog","isPartOf":{"@id":"https:\/\/www.dongchangbin.net.cn\/#website"},"datePublished":"2012-11-19T10:27:11+00:00","dateModified":"2012-11-19T10:27:11+00:00","breadcrumb":{"@id":"https:\/\/www.dongchangbin.net.cn\/?p=10#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.dongchangbin.net.cn\/?p=10"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.dongchangbin.net.cn\/?p=10#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.dongchangbin.net.cn\/"},{"@type":"ListItem","position":2,"name":"JS\u5c0f\u6570\u8ba1\u7b97\u95ee\u9898"}]},{"@type":"WebSite","@id":"https:\/\/www.dongchangbin.net.cn\/#website","url":"https:\/\/www.dongchangbin.net.cn\/","name":"Dong's Blog","description":"\u6162\u6162\u6765\uff0c\u6bd4\u8f83\u5feb","publisher":{"@id":"https:\/\/www.dongchangbin.net.cn\/#\/schema\/person\/1420649ce898d888fea55ef4fa6e8fae"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.dongchangbin.net.cn\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"zh-Hans"},{"@type":["Person","Organization"],"@id":"https:\/\/www.dongchangbin.net.cn\/#\/schema\/person\/1420649ce898d888fea55ef4fa6e8fae","name":"Dong","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.dongchangbin.net.cn\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/3d0ac155d3e1aba6eca6a0a2bb3cdba1?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/3d0ac155d3e1aba6eca6a0a2bb3cdba1?s=96&d=mm&r=g","caption":"Dong"},"logo":{"@id":"https:\/\/www.dongchangbin.net.cn\/#\/schema\/person\/image\/"},"url":"https:\/\/www.dongchangbin.net.cn\/?author=1"}]}},"_links":{"self":[{"href":"https:\/\/www.dongchangbin.net.cn\/index.php?rest_route=\/wp\/v2\/posts\/10"}],"collection":[{"href":"https:\/\/www.dongchangbin.net.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dongchangbin.net.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dongchangbin.net.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dongchangbin.net.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10"}],"version-history":[{"count":0,"href":"https:\/\/www.dongchangbin.net.cn\/index.php?rest_route=\/wp\/v2\/posts\/10\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.dongchangbin.net.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dongchangbin.net.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dongchangbin.net.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}