{"id":1537,"date":"2024-11-10T14:22:18","date_gmt":"2024-11-10T06:22:18","guid":{"rendered":"https:\/\/fwq.ai\/blog\/1537\/"},"modified":"2024-11-10T14:22:18","modified_gmt":"2024-11-10T06:22:18","slug":"javascript-%e4%b8%ad%e5%a6%82%e4%bd%95%e8%8e%b7%e5%8f%96%e7%a9%ba%e5%85%83%e7%b4%a0%e7%9a%84%e9%95%bf%e5%ba%a6%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/1537\/","title":{"rendered":"JavaScript \u4e2d\u5982\u4f55\u83b7\u53d6\u7a7a\u5143\u7d20\u7684\u957f\u5ea6\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173045934412752.jpg\" class=\"aligncenter\" title=\"JavaScript \u4e2d\u5982\u4f55\u83b7\u53d6\u7a7a\u5143\u7d20\u7684\u957f\u5ea6\uff1f\u63d2\u56fe\" alt=\"JavaScript \u4e2d\u5982\u4f55\u83b7\u53d6\u7a7a\u5143\u7d20\u7684\u957f\u5ea6\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>js\u83b7\u53d6\u5185\u5bb9\u4e3a\u7a7a\u7684\u5143\u7d20\u957f\u5ea6<\/strong><\/p>\n<p>\u5728 javascript \u4e2d\uff0c\u4f7f\u7528 jquery \u53ef\u4ee5\u5224\u65ad\u4e00\u4e2a\u5143\u7d20\u662f\u5426\u4e3a\u7a7a\uff0c\u4f46\u5bf9\u4e8e\u83b7\u53d6\u4e3a\u7a7a\u5143\u7d20\u7684\u957f\u5ea6\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e2a\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n<p>\u5229\u7528 filter \u9ad8\u9636\u51fd\u6570\u8fc7\u6ee4\u51fa\u7a7a\u5143\u7d20\uff0c\u5e76\u8fd4\u56de\u5176\u957f\u5ea6\uff1a<\/p>\n<pre>[1, 2, null, null, 5]\n  .filter(function (item) {\n    return item === null;\n  })\n  .length;<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fJavaScript \u4e2d\u5982\u4f55\u83b7\u53d6\u7a7a\u5143\u7d20\u7684\u957f\u5ea6\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>js\u83b7\u53d6\u5185\u5bb9\u4e3a\u7a7a\u7684\u5143\u7d20\u957f\u5ea6 \u5728 javascript \u4e2d\uff0c\u4f7f\u7528 jquery \u53ef\u4ee5\u5224\u65ad\u4e00\u4e2a\u5143\u7d20\u662f\u5426\u4e3a\u7a7a\uff0c\u4f46\u5bf9\u4e8e\u83b7\u53d6\u4e3a\u7a7a\u5143\u7d20\u7684\u957f\u5ea6\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e2a\u89e3\u51b3\u65b9\u6848\uff1a \u5229\u7528 filter \u9ad8\u9636\u51fd\u6570\u8fc7\u6ee4\u51fa\u7a7a\u5143\u7d20\uff0c\u5e76\u8fd4\u56de\u5176\u957f\u5ea6\uff1a [1, 2, null, null, 5] .filter(function (item) { return item === null; }) .length; \u767b\u5f55\u540e\u590d\u5236 \u4ee5\u4e0a\u5c31\u662fJavaScript \u4e2d\u5982\u4f55\u83b7\u53d6\u7a7a\u5143\u7d20\u7684\u957f\u5ea6\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/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-1537","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/1537","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=1537"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/1537\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=1537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=1537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=1537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}