{"id":52,"date":"2016-04-18T14:46:23","date_gmt":"2016-04-18T06:46:23","guid":{"rendered":"http:\/\/loveuhouse.cn\/wordpress\/?p=52"},"modified":"2016-04-18T14:47:08","modified_gmt":"2016-04-18T06:47:08","slug":"%e4%bd%a0%e8%af%95%e8%bf%87-arr-length-%e7%bb%93%e6%9e%9c%e6%98%afundefined%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/loveuhouse.cn\/wordpress\/?p=52","title":{"rendered":"\u4f60\u8bd5\u8fc7 arr.length \u7ed3\u679c\u662fundefined\u5417\uff1f"},"content":{"rendered":"<p>\u5c31\u5728\u6628\u5929\uff0c\u53d1\u73b0\u4e00\u4e2afor\u4e0d\u80fd\u6267\u884c<\/p>\n<pre class=\"lang:default decode:true \">for(var i = 0 ; i &lt; arr.length ; i++)<\/pre>\n<p>\u987f\u65f6\u5c31\u7eb3\u95f7\u4e86\uff0c\u539f\u56e0\u662f arr.length \u672a\u5b9a\u4e49<\/p>\n<p>\u4e8e\u662f\u6267\u7740\u534a\u5929\u540e\u53d1\u73b0\u539f\u6765\u662f\u4e00\u4e2a\u975e\u5e38\u57fa\u7840\u7684\u95ee\u9898<\/p>\n<p>arr={} ? arr=[] ?\u7684\u533a\u522b<\/p>\n<pre class=\"lang:default decode:true  \">\/*\u4e00\u4e8c\u697c\u9632\u541e\n*\/\n\u524d\u8005 var arr={} \u76f8\u5f53\u4e8e var arr = new Object();\n\n\u540e\u8005 var arr=[] \u76f8\u5f53\u4e8e var arr = new Array();\n\n(\u2299v\u2299)\u55ef\uff0c\u7ea0\u7ed3\u4e86\u8fd9\u4e48\u4e45\u5230\u5e95\u662f\u8c01\u7684\u9505\uff1f\nIt is a problem<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5c31\u5728\u6628\u5929\uff0c\u53d1\u73b0\u4e00\u4e2afor\u4e0d\u80fd\u6267\u884c for(var i = 0 ; i &lt; arr.length ; i+ &hellip; <a href=\"https:\/\/loveuhouse.cn\/wordpress\/?p=52\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u4f60\u8bd5\u8fc7 arr.length \u7ed3\u679c\u662fundefined\u5417\uff1f<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[],"_links":{"self":[{"href":"https:\/\/loveuhouse.cn\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/52"}],"collection":[{"href":"https:\/\/loveuhouse.cn\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/loveuhouse.cn\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/loveuhouse.cn\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/loveuhouse.cn\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=52"}],"version-history":[{"count":3,"href":"https:\/\/loveuhouse.cn\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/52\/revisions"}],"predecessor-version":[{"id":55,"href":"https:\/\/loveuhouse.cn\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/52\/revisions\/55"}],"wp:attachment":[{"href":"https:\/\/loveuhouse.cn\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=52"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/loveuhouse.cn\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=52"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/loveuhouse.cn\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=52"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}