{"id":12996,"date":"2023-11-29T10:14:29","date_gmt":"2023-11-29T02:14:29","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=12996"},"modified":"2023-11-29T10:14:35","modified_gmt":"2023-11-29T02:14:35","slug":"qian-duan-mian-shi-ti-ru-he-jian-cha-dui-xiang-zho","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/29\/qian-duan-mian-shi-ti-ru-he-jian-cha-dui-xiang-zho\/","title":{"rendered":"\u524d\u7aef\u9762\u8bd5\u9898\uff1a\u5982\u4f55\u68c0\u67e5\u5bf9\u8c61\u4e2d\u662f\u5426\u5b58\u5728\u67d0\u4e2a\u5c5e\u6027\uff1f"},"content":{"rendered":"<p>\u68c0\u67e5\u5bf9\u8c61\u4e2d\u662f\u5426\u5b58\u5728\u5c5e\u6027\u6709\u4e09\u79cd\u65b9\u6cd5\u3002<br \/>\n\u7b2c\u4e00\u79cd\u4f7f\u7528in\u64cd\u4f5c\u7b26\u53f7\uff1a<br \/>\nconst o = {<br \/>\n&quot;prop&quot; : &quot;bwahahah&quot;,<br \/>\n&quot;prop2&quot; : &quot;hweasa&quot;<br \/>\n};<br \/>\nconsole. log(&quot;prop&quot; in o)\uff1b \/\/ true<br \/>\nconsole. Log(&quot;propl&quot; in o); \/\/ false<br \/>\n\u7b2c\u4e8c\u79cd\u4f7f\u7528hasOwnProperty\u65b9\u6cd5\uff0chasOwnProperty()\u65b9\u6cd5\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\uff0c\u6307\u793a\u5bf9\u8c61\u81ea \u8eab\u5c5e\u6027\u4e2d\u662f\u5426\u5177\u6709\u6307\u5b9a\u7684\u5c5e\u6027(\u4e5f\u5c31\u662f\uff0c\u662f\u5426\u6709\u6307\u5b9a\u7684\u952e)\u3002<br \/>\nconsole. log(o. hasOwnProperty(&quot;prop2&quot;))\uff1b \/\/ true<br \/>\nconsole. log(o. hasOwnProperty(&quot;propl&quot;))\uff1b \/\/ false<br \/>\n\u7b2c\u4e09\u79cd\u4f7f\u7528\u62ec\u53f7\u7b26\u53f7obj[Bprop&quot;]0\u5982\u679c\u5c5e\u6027\u5b58\u5728\uff0c\u5b83\u5c06\u8fd4\u56de\u8be5\u5c5e\u6027\u7684\u503c\uff0c\u5426\u5219\u5c06\u8fd4\u56de undefined\u3002<br \/>\nconsole. log(o[&quot;prop&quot;])\uff1b \/\/ &quot;bwahahah&quot; console. log(o[&quot;propl&quot;])\uff1b \/\/ undefined<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u68c0\u67e5\u5bf9\u8c61\u4e2d\u662f\u5426\u5b58\u5728\u5c5e\u6027\u6709\u4e09\u79cd\u65b9\u6cd5\u3002 \u7b2c\u4e00\u79cd\u4f7f\u7528in\u64cd\u4f5c\u7b26\u53f7\uff1a const o = { &quot;prop&#038;q [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[103],"tags":[],"class_list":["post-12996","post","type-post","status-publish","format-standard","hentry","category-qianduan"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12996","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=12996"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12996\/revisions"}],"predecessor-version":[{"id":12997,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12996\/revisions\/12997"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=12996"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=12996"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=12996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}