{"id":598,"date":"2024-01-03T18:01:01","date_gmt":"2024-01-03T10:01:01","guid":{"rendered":""},"modified":"2024-01-03T18:01:01","modified_gmt":"2024-01-03T10:01:01","slug":"\u6570\u7ec4\u53bb\u91cd\u65b9\u6cd5\uff1afilter\uff0creduce","status":"publish","type":"post","link":"https:\/\/mushiming.com\/598.html","title":{"rendered":"\u6570\u7ec4\u53bb\u91cd\u65b9\u6cd5\uff1afilter\uff0creduce"},"content":{"rendered":"<h3 id=\"filter%E3%80%81reduce%E5%AE%9E%E7%8E%B0%E6%95%B0%E7%BB%84%E5%8E%BB%E9%87%8D%E3%80%82\">filter\u3001reduce\u5b9e\u73b0\u6570\u7ec4\u53bb\u91cd\u3002<\/h3>\n<blockquote>\n<p><strong>filter\u5b9e\u73b0\u6570\u7ec4\u53bb\u91cd\u4ee3\u7801<\/strong><\/p>\n<\/blockquote>\n<pre class=\"language-java prettyprint linenums\"><code class=\"language-javascript\">\/**\n * filter\n *\/\n\nlet ar = [1, 2, 2, 3, 4, 4, 5]\n\nlet unique_ar = ar.filter((x, index) =&gt; {\n    \/\/ if(ar.indexOf(x)===index){\n    \/\/     return true\n    \/\/ }else{\n    \/\/     return false\n    \/\/ }\n    return ar.indexOf(x) === index\n})\n\nconsole.log(unique_ar)<\/code><\/pre>\n<blockquote>\n<p><strong>reduce\u5b9e\u73b0\u6570\u7ec4\u53bb\u91cd\u4ee3\u7801<\/strong><\/p>\n<\/blockquote>\n<pre class=\"language-java prettyprint linenums\"><code class=\"language-javascript\">\/**\n * reduce\n *\/\n\nlet ar = [1, 2, 2, 3, 4, 4, 5]\nlet mySum=ar.reduce((newArr,value)=&gt;{\n    console.log('item',value,newArr.indexOf(value))\n    newArr&amp;&amp;newArr.indexOf(value)&gt;0?null:newArr.push(value);\n    console.log('newArr',newArr)\n    return newArr;\n},[])\nconsole.log('reduce\u53bb\u91cd\u540e',mySum)<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/common_img\/c9bec42d5983402db7ae310a02a7c7d6.png\" =\"\" =\"\" alt=\"\u6570\u7ec4\u53bb\u91cd\u65b9\u6cd5\uff1afilter\uff0creduce (https:\/\/mushiming.com\/) \u6280\u672f\u535a\u5ba2 \u7b2c1\u5f20\" title=\"\u6570\u7ec4\u53bb\u91cd\u65b9\u6cd5\uff1afilter\uff0creduce \u6280\u672f\u535a\u5ba2 \u7b2c1\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" >&nbsp;<\/p>\n<blockquote>\n<p><strong>\u91cd\u70b9\u601d\u8003\uff1a<\/strong><\/p>\n<p>\u5404\u81ea\u7684\u5b9e\u73b0\u601d\u60f3\u662f\u4ec0\u4e48\uff1f<\/p>\n<p style=\"text-indent:33px;\">filter\u7684\u53bb\u91cd\u65b9\u6cd5\uff1a\u5229\u7528\u4e86\u8fc7\u6ee4\u65b9\u6cd5\u2014\u2014filter\uff0c\u904d\u5386\u8c03\u7528\u5b83\u7684\u8fd9\u4e2a\u6570\u7ec4\uff0c\u5e76\u4e14\u4e0d\u6539\u53d8\u539f\u6570\u7ec4\u3002\u5de7\u5999\u5730\u901a\u8fc7filter\u51fd\u6570\uff0c\u6bcf\u6b21\u904d\u5386\u6570\u7ec4\u5143\u7d20\u90fd\u4f1a\u6709\u4e00\u4e2a\u8fd4\u56de\u503c\u7684\u201ctrue\u201d\u6216\u201cfalse\u201d\u7684\u7279\u6027\uff0c\u7b80\u6d01\u7684\u5b9e\u73b0\u53bb\u91cd\uff0c\u6700\u7ec8\u5f97\u5230\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u3002<\/p>\n<p style=\"text-indent:33px;\">reduce\u7684\u53bb\u91cd\u65b9\u6cd5\uff1a\u5229\u7528\u4e86reduce\u81ea\u52a8\u6c42\u548c\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u4e00\u4e2a\u548c\u7684\u521d\u59cb\u503c\uff0c\u6765\u5b58\u6700\u540e\u53bb\u91cd\u540e\u7684\u6570\u7ec4\u3002\u4e3b\u8981\u662f\u5224\u65ad\u5f53\u524d\u88ab\u904d\u5386\u7684\u5143\u7d20\u662f\u5426\u5b58\u5728\u4e8enewArr\u4e2d\uff0c\u6709\u7684\u8bdd\uff0c\u4e0d\u505a\u4efb\u4f55\u64cd\u4f5c\uff0c\u6ca1\u6709\u7684\u8bdd\uff0c\u5c31\u628a\u5b83\u653e\u8fdb\u53bb\uff0c\u6700\u540e\u8fd4\u56de\u51fa\u4e00\u4e2a\u53bb\u91cd\u540e\u7684\u7ed3\u679c\u6570\u7ec4\u3002\u540c\u6837\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u4e5f\u662f\u6ca1\u6709\u6539\u53d8\u539f\u6765\u7684\u6570\u7ec4\u3002<\/p>\n<p>&nbsp;<\/p>\n<\/blockquote>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"\u6570\u7ec4\u53bb\u91cd\u65b9\u6cd5\uff1afilter\uff0creducefilter\u3001reduce\u5b9e\u73b0\u6570\u7ec4\u53bb\u91cd\u3002filter\u5b9e\u73b0\u6570\u7ec4\u53bb\u91cd\u4ee3\u7801\/***filter*\/letar=[1,2,2,3,4,4,5]letuni...","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[82],"tags":[],"_links":{"self":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/598"}],"collection":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/comments?post=598"}],"version-history":[{"count":0,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/598\/revisions"}],"wp:attachment":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/media?parent=598"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/categories?post=598"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/tags?post=598"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}