{"rsdb":{"rid":"157979","subhead":"","postdate":"0","aid":"118463","fid":"54","uid":"1","topic":"1","content":"

\u76f8\u4fe1\u540c\u5b66\u4eec\u5728\u770b\u89c1\u8fd9\u4e2a\u6807\u9898\u7684\u65f6\u5019\u5c31\u4e00\u8138\u61f5\u903c\u4e86\uff0c\u4ec0\u4e48\uff1fJS\u80fd\u5e38\u91cf\u5b9a\u4e49\uff1f\u522b\u9017\u6211\u597d\u5417\uff1f\u786e\u5207\u7684\u8bf4\uff0cJS\u5f53\u4e2d\u786e\u5b9e\u6ca1\u6709\u5e38\u91cf\uff08ES6\u4e2d\u597d\u50cf\u6709\u4e86\u5e38\u91cf\u5b9a\u4e49\u7684\u5173\u952e\u5b57\uff09\uff0c\u4f46\u662f\u6df1\u5165\u4e00\u4e0b\u6211\u4eec\u53ef\u4ee5\u53d1\u73b0JS\u5f88\u591a\u4e0d\u4e3a\u4eba\u77e5\u7684\u6027\u8d28\uff0c\u597d\u597d\u5229\u7528\u8fd9\u4e9b\u6027\u8d28\uff0c\u5c31\u4f1a\u53d1\u73b0\u4e00\u4e2a\u4e0d\u4e00\u6837\u7684JS\u4e16\u754c\u3002<\/p>

\u9996\u5148\uff0c\u5728JS\u5f53\u4e2d\uff0c\u5bf9\u8c61\u7684\u5c5e\u6027\u5176\u5b9e\u8fd8\u542b\u6709\u81ea\u5df1\u7684\u9690\u542b\u6027\u8d28\uff0c\u6bd4\u5982\u4e0b\u9762\u5bf9\u8c61\uff1a<\/p>

\u5728\u8fd9\u91cc\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5bf9\u8c61 obj \uff0c\u5e76\u4e14\u5b9a\u4e49\u4e86\u8fd9\u4e2a\u5bf9\u8c61\u7684\u4e24\u4e2a\u5c5e\u6027 a \u3001 b \uff0c\u6211\u4eec\u53ef\u4ee5\u4fee\u6539\u8fd9\u4e24\u4e2a\u5c5e\u6027\u7684\u503c\uff0c\u53ef\u4ee5\u7528 delete \u5173\u952e\u5b57\u5220\u9664\u8fd9\u4e24\u4e2a\u5c5e\u6027\uff0c\u4e5f\u53ef\u4ee5\u7528 for ... in ... \u8bed\u53e5\u679a\u4e3e obj \u5bf9\u8c61\u7684\u6240\u6709\u5c5e\u6027\uff0c\u4ee5\u4e0a\u7684\u8fd9\u4e9b\u64cd\u4f5c\u53eb\u505a\u5bf9\u8c61\u5c5e\u6027\u7684\u6027\u8d28\uff0c\u5728\u6211\u4eec\u5e73\u5e38\u7f16\u5199\u4ee3\u7801\u7684\u65f6\u5019\u6211\u4eec\u4f1a\u4e0d\u77e5\u4e0d\u89c9\u7684\u9ed8\u8ba4\u4e86\u8fd9\u4e9b\u6027\u8d28\uff0c\u628a\u4ed6\u4eec\u8ba4\u4f5c\u4e3aJS\u5e94\u6709\u7684\u6027\u8d28\uff0c\u6b8a\u4e0d\u77e5\u8fd9\u4e9b\u6027\u8d28\u5176\u5b9e\u662f\u53ef\u4ee5\u4fee\u6539\u7684\u3002\u6211\u901a\u5e38\u7684\u5b9a\u4e49\u7684\u5c5e\u6027\u7684\u65b9\u6cd5\uff0c\u9ed8\u8ba4\u4e86\u5c5e\u6027\u7684\u6027\u8d28\uff0c\u4e0d\u8fc7\u6211\u4eec\u4e5f\u53ef\u4ee5\u5728\u5b9a\u4e49\u5c5e\u6027\u7684\u65f6\u5019\u4fee\u6539\u5c5e\u6027\u7684\u6027\u8d28\uff0c\u6bd4\u5982\uff1a<\/p>

\u8fd9\u91cc\u6d89\u53ca\u5230\u4e86\u4e00\u4e2a\u65b9\u6cd5\uff0cObject.defineProperty()\uff0c\u8be5\u65b9\u6cd5\u662fES5\u89c4\u8303\u4e2d\u7684\uff0c\u8be5\u65b9\u6cd5\u7684\u4f5c\u7528\u662f\u5728\u5bf9\u8c61\u4e0a\u5b9a\u4e49\u4e00\u4e2a\u65b0\u5c5e\u6027\uff0c\u6216\u8005\u4fee\u6539\u5bf9\u8c61\u7684\u4e00\u4e2a\u73b0\u6709\u5c5e\u6027\uff0c\u5e76\u5bf9\u8be5\u5c5e\u6027\u52a0\u4ee5\u63cf\u8ff0\uff0c\u8fd4\u56de\u8fd9\u4e2a\u5bf9\u8c61\uff0c\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u6d4f\u89c8\u5668\u517c\u5bb9\u6027\uff1a<\/p>","orderid":"0","title":"JavaScript \u5e38\u91cf\u5b9a\u4e49","smalltitle":"","mid":"0","fname":"linux\u7f16\u7a0b\u57fa\u7840","special_id":"0","bak_id":"0","info":"0","hits":"297","pages":"1","comments":"0","posttime":"2017-07-13 10:22:57","list":"1499912577","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"https:\/\/www.cppentry.com\/upload_files\/","ispic":"0","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"JavaScript<\/A> \u5e38\u91cf<\/A> \u5b9a\u4e49<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"218.17.197.194","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"java script \u5e38\u91cf\u5b9a\u4e49","lastview":"1699551389","digg_num":"6952","digg_time":"0","forbidcomment":"0","ifvote":"0","heart":"","htmlname":"","city_id":"0"},"page":"1"}