{"id":12045,"date":"2023-11-28T22:41:15","date_gmt":"2023-11-28T14:41:15","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=12045"},"modified":"2023-11-28T22:41:19","modified_gmt":"2023-11-28T14:41:19","slug":"qian-duan-mian-shi-ti-diao-yong-han-shu-ke-yi-shi","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/qian-duan-mian-shi-ti-diao-yong-han-shu-ke-yi-shi\/","title":{"rendered":"\u524d\u7aef\u9762\u8bd5\u9898\uff1a\u8c03\u7528\u51fd\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u54ea\u4e9b\u65b9\u6cd5\uff1f"},"content":{"rendered":"<p>\u5728JS\u4e2d\u67094\u79cd\u65b9\u6cd5\u53ef\u4ee5\u8c03\u7528\u51fd\u6570\u3002<br \/>\n\u4f5c\u4e3a\u51fd\u6570\u8c03\u7528\u4e00\u4e00\u5982\u679c\u4e00\u4e2a\u51fd\u6570\u6ca1\u6709\u4f5c\u4e3a\u65b9\u6cd5\u3001\u6784\u9020\u51fd\u6570\u3001apply\u3001 call\u8c03\u7528\u65f6\uff0c\u6b64\u65f6this\u6307 \u5411\u7684\u662fwindow\u5bf9\u8c61(\u975e\u4e25\u683c\u6a21\u5f0f)<br \/>\n\/\/Global Scope<br \/>\nfunction add(a,b){<br \/>\nconsole. log(this)\uff1b<br \/>\nreturn a + b;<br \/>\n}<br \/>\nadd(1,5)\uff1b \/\/ \u6253\u5370&quot;window&quot;\u5bf9\u8c61\u548c 6<br \/>\nconst o = {<br \/>\nmethod(callback) {<br \/>\ncallback() \uff1b<br \/>\n}<br \/>\no. method (function () {<br \/>\nconsole. log (this) \uff1b \/\/ \u6253\u5370&quot;window&quot;\u5bf9\u8c61<br \/>\n});<br \/>\n\u4f5c\u4e3a\u65b9\u6cd5\u8c03\u7528\u2014\u2014\u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027\u6709\u4e00\u4e2a\u51fd\u6570\u7684\u503c\uff0c\u6211\u4eec\u5c31\u79f0\u5b83\u4e3a\u65b9\u6cd5\u3002\u8c03\u7528\u8be5\u65b9\u6cd5\u65f6, \u8be5\u65b9\u6cd5\u7684this\u503c\u6307\u5411\u8be5\u5bf9\u8c61\u3002<br \/>\nconst details = {<br \/>\nname : &quot;Marko&quot;,<br \/>\ngetName () {<br \/>\nreturn this. name\uff1b<br \/>\n}<br \/>\n}<br \/>\ndetails. getName()\uff1b \/\/ Marko<br \/>\n\u4f5c\u4e3a\u6784\u9020\u51fd\u6570\u7684\u8c03\u7528-\u5982\u679c\u5728\u51fd\u6570\u4e4b\u524d\u4f7f\u7528new\u5173\u952e\u5b57\u8c03\u7528\u4e86\u51fd\u6570\uff0c\u5219\u8be5\u51fd\u6570\u79f0\u4e3a\u6784\u9020\u51fd\u6570\u3002 \u6784\u9020\u51fd\u6570\u91cc\u9762\u4f1a\u9ed8\u8ba4\u521b\u5efa\u4e00\u4e2a\u7a7a\u5bf9\u8c61\uff0c\u5e76\u5c06this\u6307\u5411\u8be5\u5bf9\u8c61\u3002<br \/>\nfunction Employee(name, position, yearHired) {<br \/>\n\/\/\u521b\u5efa\u4e00\u4e2a\u7a7a\u5bf9\u8c61{}<br \/>\n\/\/\u7136\u540e\u5c06\u7a7a\u5bf9\u8c61\u5206\u914d\u7ed9\u201cthis\u201d\u5173\u952e\u5b57<br \/>\n\/\/ this = {};<br \/>\nthis. name = name\uff1b<br \/>\nthis. position = position\uff1b<br \/>\nthis. yearHired = yearHired\uff1b<br \/>\n\/\/\u5982\u679c\u6ca1\u6709\u6307\u5b9areturn\uff0c\u8fd9\u91cc\u4f1a\u9ed8\u8ba4\u8fd4\u56dethis<br \/>\n};<br \/>\nconst emp = new Employee(&quot;Marko Polo&quot;, &quot;Software Developer&quot;, 2017)\uff1b<br \/>\n\u4f7f\u7528apply\u548ccall\u65b9\u6cd5\u8c03\u7528\u2014\u2014\u5982\u679c\u6211\u4eec\u60f3\u663e\u5f0f\u5730\u6307\u5b9a\u4e00\u4e2a\u51fd\u6570\u7684this\u503c\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u8fd9 \u4e9b\u65b9\u6cd5\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u5bf9\u6240\u6709\u51fd\u6570\u90fd\u53ef\u7528\u3002<br \/>\nconst objl = {<br \/>\nresult\uff1a0<br \/>\n};<br \/>\nconst obj2 = {<br \/>\nresult\uff1a0<br \/>\n};<br \/>\nfunction reduceAdd(){<br \/>\nlet result = 0\uff1b<br \/>\nfor(let i = 0, len = arguments. length\uff1b i &lt; 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