{"id":266,"date":"2020-02-05T21:48:28","date_gmt":"2020-02-05T13:48:28","guid":{"rendered":"https:\/\/www.notown.club\/?p=266"},"modified":"2020-04-05T22:31:36","modified_gmt":"2020-04-05T14:31:36","slug":"javascript%e7%9a%84%e8%b7%9f%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%9c%89%e5%85%b3%e7%9a%84%e5%87%bd%e6%95%b0%e5%8f%8a%e7%b1%bb%e5%9e%8b%e8%bd%ac%e6%8d%a2","status":"publish","type":"post","link":"https:\/\/www.notown.top\/?p=266","title":{"rendered":"Javascript\u7684\u8ddf\u5b57\u7b26\u4e32\u6709\u5173\u7684\u51fd\u6570\u53ca\u7c7b\u578b\u8f6c\u6362"},"content":{"rendered":"\n<p>\u5199\u5728\u524d\u9762\uff1aJavaScript\u4e00\u5207\u7686\u4e3a\u5bf9\u8c61\uff0c\u6240\u4ee5\u672c\u6587\u7ae0\u4e2d\u7684\u51fd\u6570\u662f\u6307\u5bf9\u8c61\u7684\u51fd\u6570\u3002<\/p>\n\n\n\n<p>1\u3001\u6c42\u5b57\u7b26\u4e32\u957f\u5ea6\uff1a<br><code>str.length <\/code><br> \/\/str\u662f\u9700\u8981\u6c42\u957f\u5ea6\u7684\u5b57\u7b26\u4e32\uff0c\u8fd4\u56de\u4e00\u4e2a\u6570\u5b57<\/p>\n\n\n\n<p>2\u3001Boolean\u3001Number\u7c7b\u578b\u8f6c\u5b57\u7b26\u4e32\uff1a<br><code>var.toString(argument)<\/code><br>\/*<br>var\u662fBoolean\u6216Number\u7c7b\u578b\u7684\u53d8\u91cf\uff0cargument\u662f\u51fd\u6570\u7684\u53c2\u6570\uff0c\u53ef\u4e0d\u5e26\uff0c\u5373\u9ed8\u8ba4\u5c06var\u768410\u8fdb\u5236\u8f6c\u6362\u4e3a\u5b57\u7b26\u578b\uff0c\u53ef\u5e26\u53c2\u65702\uff0c8\uff0c16\uff0c\u5206\u522b\u8868\u793a\u4e8c\u8fdb\u5236\u3001\u516b\u8fdb\u5236\u3001\u5341\u516d\u8fdb\u5236\uff0c\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32<br>*\/<\/p>\n\n\n\n<p>3\u3001\u5c06\u5b57\u7b26\u4e32\u7c7b\u578b\u8f6c\u6210\u6570\u5b57\uff1a<br><code>parseInt(str)<br>parseFloat(str)<\/code><br>\/*<br>str\u4e3a\u5f85\u8f6c\u6362\u7684\u5b57\u7b26\u4e32\uff0c\u8fd4\u56de\u4e00\u4e2a\u6570\u5b57\uff0c\u6839\u636e\u6574\u6570\u8fd8\u662f\u5c0f\u6570\u8981\u7528\u4e0d\u540c\u7684\u51fd\u6570<br>\u6309\u7167\u4ece\u524d\u5f80\u540e\u7684\u987a\u5e8f\u4f9d\u6b64\u8bc6\u522b\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\uff0c\u4e00\u65e6\u9047\u5230\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u4e3a\u975e\u6570\u5b57\uff0c\u4f1a\u9a6c\u4e0a\u7ec8\u6b62\uff0c\u5e76\u8fd4\u56de\u5df2\u7ecf\u8bc6\u522b\u7684\u6d6e\u70b9\u6570\u3002<br>*\/<br>4\u3001\u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u6709\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u51fd\u6570\uff1a<br><code>Number(value)\/\/\u8fd4\u56de\u76f8\u5e94\u7684\u6574\u6570\u6216\u8005\u5c0f\u6570<br>Boolean(value)\/\/\u8fd4\u56detrue\u6216\u8005false<br>String(value)\/\/\u8fd4\u56de\u5b57\u7b26\u4e32<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5199\u5728\u524d\u9762\uff1aJavaScript\u4e00\u5207\u7686\u4e3a\u5bf9\u8c61\uff0c\u6240\u4ee5\u672c\u6587\u7ae0\u4e2d\u7684\u51fd\u6570\u662f\u6307\u5bf9\u8c61\u7684\u51fd\u6570\u3002 1\u3001\u6c42\u5b57\u7b26\u4e32\u957f\u5ea6\uff1astr.le&hellip;<a href=\"https:\/\/www.notown.top\/?p=266\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Javascript\u7684\u8ddf\u5b57\u7b26\u4e32\u6709\u5173\u7684\u51fd\u6570\u53ca\u7c7b\u578b\u8f6c\u6362<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[13],"tags":[],"class_list":["post-266","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=266"}],"version-history":[{"count":3,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/266\/revisions"}],"predecessor-version":[{"id":416,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/266\/revisions\/416"}],"wp:attachment":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}