{"id":53527,"date":"2024-12-03T15:09:48","date_gmt":"2024-12-03T07:09:48","guid":{"rendered":"https:\/\/fwq.ai\/blog\/53527\/"},"modified":"2024-12-03T15:09:48","modified_gmt":"2024-12-03T07:09:48","slug":"javascript-%e4%b8%ad%e7%9a%84%e6%95%b0%e7%bb%84%e5%88%86%e7%bb%84%ef%bc%884%ef%bc%89","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/53527\/","title":{"rendered":"JavaScript \u4e2d\u7684\u6570\u7ec4\u5206\u7ec4\uff084\uff09"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>JavaScript \u4e2d\u7684\u6570\u7ec4\u5206\u7ec4\uff084\uff09<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span>    <\/p>\n<p>\u5077\u5077\u52aa\u529b\uff0c\u6084\u65e0\u58f0\u606f\u5730\u53d8\u5f3a\uff0c\u7136\u540e\u60ca\u8273\u6240\u6709\u4eba\uff01\u54c8\u54c8\uff0c\u5c0f\u4f19\u4f34\u4eec\u53c8\u6765\u5b66\u4e60\u5566~\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJavaScript \u4e2d\u7684\u6570\u7ec4\u5206\u7ec4\uff084\uff09\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u4e0d\u77e5\u9053\u5927\u5bb6\u5bf9\u5176\u90fd\u6709\u591a\u5c11\u4e86\u89e3\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u4e00\u8d77\u6765\u770b\u4e00\u5427\uff01\u5f53\u7136\uff0c\u975e\u5e38\u5e0c\u671b\u5927\u5bb6\u80fd\u591a\u591a\u8bc4\u8bba\uff0c\u7ed9\u51fa\u5408\u7406\u7684\u5efa\u8bae\uff0c\u6211\u4eec\u4e00\u8d77\u5b66\u4e60\uff0c\u4e00\u8d77\u8fdb\u6b65\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241201\/1733043016674c234817a8d.jpg\" class=\"aligncenter\" title=\"JavaScript \u4e2d\u7684\u6570\u7ec4\u5206\u7ec4\uff084\uff09\u63d2\u56fe\" alt=\"JavaScript \u4e2d\u7684\u6570\u7ec4\u5206\u7ec4\uff084\uff09\u63d2\u56fe\" \/><\/p>\n<p>JavaScript \u4e2d\u7684\u6570\u7ec4\u5206\u7ec4 (2024)<br \/> \u6570\u7ec4\u5206\u7ec4\u5728 JavaScript \u4e2d\u5e76\u4e0d\u662f\u4ec0\u4e48\u65b0\u9c9c\u4e8b\u3002\u6570\u7ec4\u5206\u7ec4\u662f JavaScript \u4e2d\u7684\u4e00\u9879\u65b0\u529f\u80fd\uff0c\u53ef\u5e2e\u52a9\u5f00\u53d1\u4eba\u5458\u6839\u636e\u7279\u5b9a\u7279\u5f81\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u7ec4\u7ec7\u6210\u7ec4\u3002\u8fd9\u4f7f\u5f97\u67e5\u627e\u548c\u4f7f\u7528\u6570\u636e\u53d8\u5f97\u66f4\u52a0\u5bb9\u6613\u3002<br \/> \u73b0\u5728\u7684\u95ee\u9898\u662f\u5b83\u662f\u5982\u4f55\u8fd0\u4f5c\u7684\uff1f <br \/> \u597d\u5427\uff0c\u5728\u6700\u65b0\u548c\u73b0\u4ee3\u7684\u65b9\u6cd5\u51fa\u73b0\u4e4b\u524d\uff0c\u5f00\u53d1\u4eba\u5458\u5c06\u6570\u7ec4\u5143\u7d20\u4ee5\u591a\u79cd\u4e0d\u540c\u7684\u65b9\u5f0f\u5206\u7ec4\uff0c\u5176\u4e2d\u5c31\u662f\u201c\u51cf\u5c11\u65b9\u6cd5\u201d\u3002<\/p>\n<p>\u793a\u4f8b\uff1a<\/p>\n<p>\u5e38\u91cf\u5b66\u751f = [<br \/> {\u59d3\u540d\uff1a\u201cSK Toukir\u201d\uff0c\u5e74\u9f84\uff1a21 }\uff0c<br \/> {\u59d3\u540d\uff1a\u201cSK Turaj\u201d\uff0c\u5e74\u9f84\uff1a21}\uff0c<br \/> {\u59d3\u540d\uff1a\u201cSK Jehan\u201d\uff0c\u5e74\u9f84\uff1a20}\uff0c<br \/> ];<br \/> const StudentAges = Student.reduce((\u7ed3\u679c, Student=&gt;{<br \/> const \u5e74\u9f84 = \u5b66\u751f.\u5e74\u9f84;<br \/> if( !\u7ed3\u679c[ \u5e74\u9f84 ] ){<br \/> \u7ed3\u679c[\u5e74\u9f84]=[];<br \/> } \u7ed3\u679c[ \u5e74\u9f84 ].push( \u5b66\u751f );<br \/> \u8fd4\u56de\u7ed3\u679c\uff1b<br \/> }),{});<br \/> console.log(studentAges);<\/p>\n<p>\u4f46\u662f\u5728\u73b0\u4ee3 JavaScript \u4e2d\u8fd9\u53d8\u5f97\u975e\u5e38\u5bb9\u6613\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u4f7f\u7528\u201cObject . groupBy\u201d\u65b9\u6cd5\u6216\u201carray.group\u201d\u5728\u51e0\u5206\u949f\u5185\u5b8c\u6210\u6b64\u64cd\u4f5c<br \/> \u65b9\u6cd5 \u3002 <br \/> 1.\u5bf9\u8c61\u3002\u5206\u7ec4\u4f9d\u636e <br \/> \u793a\u4f8b\uff1a<\/p>\n<p>\u5e38\u91cf\u5b66\u751f = [<br \/> {\u59d3\u540d\uff1a\u201cSK Toukir\u201d\uff0c\u5e74\u9f84\uff1a21 }\uff0c<br \/> {\u59d3\u540d\uff1a\u201cSK Turaj\u201d\uff0c\u5e74\u9f84\uff1a21}\uff0c<br \/> {\u59d3\u540d\uff1a\u201cSK Jehan\u201d\uff0c\u5e74\u9f84\uff1a20}\uff0c<br \/> ];<br \/> const StudentAges = Object.groupBy( Students, ( Student=&gt;student.age ) );<br \/> console.log(studentAges);<\/p>\n<p>\u5728\u6b64\u65b9\u6cd5\u4e2d\uff0c\u5f00\u53d1\u4eba\u5458\u9996\u5148\u7f16\u5199 Object.groupBy\uff08\u65b9\u6cd5\u540d\u79f0\uff09\uff0c\u5b83\u9700\u8981 2 \u4e2a\u53c2\u6570\u3002\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u6570\u7ec4\u540d\u79f0\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u56de\u8c03\u51fd\u6570\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u8f7b\u677e\u5730\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u5206\u7ec4\u3002<\/p>\n<ol>\n<li>\u6570\u7ec4.group \u793a\u4f8b\uff1a<\/li>\n<\/ol>\n<p>\u5e38\u91cf\u5b66\u751f = [<br \/> {\u59d3\u540d\uff1a\u201cSK Toukir\u201d\uff0c\u5e74\u9f84\uff1a21 }\uff0c<br \/> {\u59d3\u540d\uff1a\u201cSK Turaj\u201d\uff0c\u5e74\u9f84\uff1a21}\uff0c<br \/> {\u59d3\u540d\uff1a\u201cSK Jehan\u201d\uff0c\u5e74\u9f84\uff1a20}\uff0c<br \/> ];<br \/> const StudentAges = Students.group( Student=&gt;student.age );<br \/> console.log(studentAges);<\/p>\n<p>group() \u65b9\u6cd5\u83b7\u53d6\u6570\u7ec4\u4e2d\u7684\u9879\u76ee\u5e76\u5c06\u5b83\u4eec\u5206\u7ec4\u3002\u6bcf\u4e2a\u7ec4\u90fd\u6709\u4e00\u4e2a\u6807\u7b7e\uff08\u79f0\u4e3a\u201c\u952e\u201d\uff09\uff0c\u5c5e\u4e8e\u8be5\u7ec4\u7684\u9879\u76ee\u4e00\u8d77\u5b58\u50a8\u5728\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002<\/p>\n<p>\u6ce8\u610f\uff1a\u5982\u679c\u8fd9\u4e9b\u62d6\u66f3\u65b9\u6cd5\u5728\u4efb\u4f55\u4eba\u7684\u8282\u70b9\u7248\u672c\u4e2d\u90fd\u4e0d\u8d77\u4f5c\u7528\uff0c\u8bf7\u5728\u201cvs code\u201d\u4e2d\u6253\u5f00\u7ec8\u7aef\uff0c\u8f93\u5165\u201cnpm i core-js\u201d\uff0c\u7136\u540e\u518d\u6b21\u8fd0\u884c\u4ee3\u7801\uff0c\u5e0c\u671b\u5b83\u4f1a\u8d77\u4f5c\u7528\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u300aJavaScript \u4e2d\u7684\u6570\u7ec4\u5206\u7ec4\uff084\uff09\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/p>\n<p>      \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb\u5220\u9664    <\/p>\n<dl>\n<dt><\/dt>\n<dd>\n   \u5982\u4f55\u5c06\u591a\u6761\u67e5\u8be2\u540c\u4e00\u8868\u4e0d\u540c\u5206\u7ec4\u7ed3\u679c\u7684SQL\u8bed\u53e5\u5408\u5e76\u6210\u4e00\u6761\u8bed\u53e5\u6267\u884c\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript \u4e2d\u7684\u6570\u7ec4\u5206\u7ec4\uff084\uff09 \u6536\u85cf \u5077\u5077\u52aa\u529b\uff0c\u6084\u65e0\u58f0\u606f\u5730\u53d8\u5f3a\uff0c\u7136\u540e\u60ca\u8273\u6240\u6709\u4eba\uff01\u54c8\u54c8\uff0c\u5c0f\u4f19\u4f34\u4eec\u53c8\u6765\u5b66\u4e60\u5566~\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300aJavaScript \u4e2d\u7684\u6570\u7ec4\u5206\u7ec4\uff084\uff09\u300b\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u4e0d\u77e5\u9053\u5927\u5bb6\u5bf9\u5176\u90fd\u6709\u591a\u5c11\u4e86\u89e3\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u4e00\u8d77\u6765\u770b\u4e00\u5427\uff01\u5f53\u7136\uff0c\u975e\u5e38\u5e0c\u671b\u5927\u5bb6\u80fd\u591a\u591a\u8bc4\u8bba\uff0c\u7ed9\u51fa\u5408\u7406\u7684\u5efa\u8bae\uff0c\u6211\u4eec\u4e00\u8d77\u5b66\u4e60\uff0c\u4e00\u8d77\u8fdb\u6b65\uff01 JavaScript \u4e2d\u7684\u6570\u7ec4\u5206\u7ec4 (2024) \u6570\u7ec4\u5206\u7ec4\u5728 JavaScript \u4e2d\u5e76\u4e0d\u662f\u4ec0\u4e48\u65b0\u9c9c\u4e8b\u3002\u6570\u7ec4\u5206\u7ec4\u662f JavaScript \u4e2d\u7684\u4e00\u9879\u65b0\u529f\u80fd\uff0c\u53ef\u5e2e\u52a9\u5f00\u53d1\u4eba\u5458\u6839\u636e\u7279\u5b9a\u7279\u5f81\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u7ec4\u7ec7\u6210\u7ec4\u3002\u8fd9\u4f7f\u5f97\u67e5\u627e\u548c\u4f7f\u7528\u6570\u636e\u53d8\u5f97\u66f4\u52a0\u5bb9\u6613\u3002 \u73b0\u5728\u7684\u95ee\u9898\u662f\u5b83\u662f\u5982\u4f55\u8fd0\u4f5c\u7684\uff1f \u597d\u5427\uff0c\u5728\u6700\u65b0\u548c\u73b0\u4ee3\u7684\u65b9\u6cd5\u51fa\u73b0\u4e4b\u524d\uff0c\u5f00\u53d1\u4eba\u5458\u5c06\u6570\u7ec4\u5143\u7d20\u4ee5\u591a\u79cd\u4e0d\u540c\u7684\u65b9\u5f0f\u5206\u7ec4\uff0c\u5176\u4e2d\u5c31\u662f\u201c\u51cf\u5c11\u65b9\u6cd5\u201d\u3002 \u793a\u4f8b\uff1a \u5e38\u91cf\u5b66\u751f = [ {\u59d3\u540d\uff1a\u201cSK Toukir\u201d\uff0c\u5e74\u9f84\uff1a21 }\uff0c {\u59d3\u540d\uff1a\u201cSK Turaj\u201d\uff0c\u5e74\u9f84\uff1a21}\uff0c {\u59d3\u540d\uff1a\u201cSK Jehan\u201d\uff0c\u5e74\u9f84\uff1a20}\uff0c ]; const StudentAges = Student.reduce((\u7ed3\u679c, Student=&gt;{ const \u5e74\u9f84 = \u5b66\u751f.\u5e74\u9f84; if( !\u7ed3\u679c[ \u5e74\u9f84 ] ){ \u7ed3\u679c[\u5e74\u9f84]=[]; } \u7ed3\u679c[ \u5e74\u9f84 ].push( \u5b66\u751f ); \u8fd4\u56de\u7ed3\u679c\uff1b }),{}); console.log(studentAges); \u4f46\u662f\u5728\u73b0\u4ee3 JavaScript \u4e2d\u8fd9\u53d8\u5f97\u975e\u5e38\u5bb9\u6613\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u4f7f\u7528\u201cObject . [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-53527","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/53527","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=53527"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/53527\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=53527"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=53527"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=53527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}