{"id":62,"date":"2021-01-17T19:29:17","date_gmt":"2021-01-17T11:29:17","guid":{"rendered":"http:\/\/gjweb.top\/?p=62"},"modified":"2021-01-17T20:05:33","modified_gmt":"2021-01-17T12:05:33","slug":"%e6%95%b0%e7%bb%84%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/gjweb.top\/?p=62","title":{"rendered":"Array-API"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">isArray<\/h2>\n\n\n\n<p>\u5224\u65ad\u7684\u662f\u5426\u4e3a\u6570\u7ec4\uff0c<strong>typof<\/strong>\u53ea\u80fd\u8fa8\u522b\u57fa\u672c\u7c7b\u578b\u7684\u503c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Array.isArray(arr)<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">indexOf<\/h2>\n\n\n\n<p>\u67e5\u627e\u6570\u7ec4\u4e2d\u7684\u5143\u7d20,\u6709\u5219\u8fd4\u56de\u4e0b\u6807,\u6ca1\u6709\u8fd4\u56de-1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>let arr = &#91;1,2,3]\narr.indexOf(1)<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">toString<\/h2>\n\n\n\n<p>\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>let arr = &#91;1,2,3]\narr.toString()<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">push<\/h2>\n\n\n\n<p>\u5728\u6570\u7ec4\u4e2d\u6700\u540e\u6dfb\u52a0\u65b0\u9879<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.push(xxx)<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">pop<\/h2>\n\n\n\n<p>\u5220\u9664\u6570\u7ec4\u6700\u540e\u4e00\u9879<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.pop()<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">unshift<\/h2>\n\n\n\n<p>\u5728\u6570\u7ec4\u7684\u7b2c\u4e00\u9879\u4e2d\u6dfb\u52a0<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.shift()<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">shift<\/h2>\n\n\n\n<p>\u5220\u9664\u6570\u7ec4\u7684\u7b2c\u4e00\u9879<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.shift()<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">join<\/h2>\n\n\n\n<p>\u81ea\u5b9a\u4e49\u5206\u5272\u7b26,\u9ed8\u8ba4\u662f\u9017\u53f7<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.join(',')<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">concat<\/h2>\n\n\n\n<p>\u5408\u5e76\u6570\u7ec4,\u8fd4\u56de\u65b0\u7684\u6570\u7ec4<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.concat()<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">reverse<\/h2>\n\n\n\n<p>\u98a0\u5012\u6570\u7ec4\u6392\u5217\u987a\u5e8f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.reverse<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">slice<\/h2>\n\n\n\n<p>\u622a\u53d6\u6570\u7ec4<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.slice(\u5f00\u59cb,\u7ed3\u675f)<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">splice<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u622a\u53d6\u6570\u7ec4(\u542b\u5934\u4e0d\u542b\u5c3e,\u4ece0\u5f00\u59cb)<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.splice(start,end)<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u66ff\u6362\u6570\u7ec4<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u6dfb\u52a0\u4e00\u4e2a\u5143\u7d20\nvar array = &#91;1,2,3,4,6];\narray.splice(4,0,5);\n\/\/&#91;1,2,3,4,5,6]\n\/\/\u66ff\u6362\u5143\u7d20\nvar array = &#91;1,2,2,4,5];\narray.splice(2,1,2);\n\/\/&#91;1,2,3,4,5]<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">sort<\/h2>\n\n\n\n<p>\u6570\u7ec4\u6392\u5e8f(\u4e0d\u652f\u6301\u6570\u5b57)<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.sort()<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u81ea\u5b9a\u4e49\u6bd4\u8f83\u5668<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.sort(function(a,b){return a-b})<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">ES6\u65b0\u589e<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">form<\/h2>\n\n\n\n<p>\u5c06\u7c7b\u6570\u7ec4\u5bf9\u8c61\u8f6c\u6362\u4e3a\u6570\u7ec4<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Array.from(\u7c7b\u6570\u7ec4\u5bf9\u8c61)<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">of<\/h2>\n\n\n\n<p>\u5c06\u4e00\u7ec4\u503c,\u8f6c\u6362\u4e3a\u6570\u7ec4<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Array.of(\u4e00\u7ec4\u503c)<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">copyWithin<\/h2>\n\n\n\n<p>\u5c06\u5236\u5b9a\u4f4d\u7f6e\u7684\u6210\u5458\u8d4b\u503c\u5230\u5176\u4ed6\u4f4d\u7f6e(\u4f1a\u8986\u76d6\u539f\u6709\u6210\u5458),\u6700\u540e\u8fd4\u56de\u65b0\u6570\u7ec4\u63a5\u6536\u7b2c\u4e09\u4e2a\u53c2\u6570;<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>target: \u4ece\u5f00\u59cb\u4f4d\u7f6e\u66ff\u6362\u6570\u636e<\/li><li>[start]: \u4ece\u8be5\u4f4d\u7f6e\u5f00\u59cb\u8bfb\u53d6\u6570\u636e.\u9ed8\u8ba4\u4e3a0,\u5982\u679c\u4e3a\u8d1f\u503c,\u8868\u793a\u5012\u6570<\/li><li>[end]: \u5230\u8be5\u4f4d\u7f6e\u524d\u505c\u6b62\u8bfb\u53d6\u6570\u636e,\u9ed8\u8ba4\u7b49\u4e8e\u6570\u7ec4\u957f\u5ea6,\u5982\u679c\u662f\u590d\u8bd5,\u8868\u793a\u5012\u6570<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>let test = &#91;1,2,3,4,5].copyWithin(0,3,4);\nconsole.log(test) \/\/&#91;4,2,3,4,5]<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">find()\/findIndex()<\/h2>\n\n\n\n<p>\u67e5\u627e\u7b2c\u4e00\u4e2a\u7b26\u5408\u6761\u4ef6\u7684\u6570\u7ec4\u6210\u5458\u8fd4\u56debool\/index.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>fill() \u586b\u5145\u6570\u7ec4<\/li><li>\u53c2\u65701: \u66ff\u6362\u6210\u4ec0\u4e48<\/li><li>\u53c2\u65702: \u5f00\u59cb\u4f4d\u7f6e<\/li><li>\u53c2\u65703: \u7ed3\u675f\u4f4d\u7f6e<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>let arr = &#91;'a','b','c','d','e'];\nconsole.log(arr.fill('o',0,3)) \/\/&#91;\"o\", \"o\", \"o\", \"d\", \"e\"]<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">entries()\\keys()\\value()<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>entries \u904d\u5386\u952e\u503c\u5bf9<\/li><li>keys \u904d\u5386\u5065\u540d<\/li><li>value \u904d\u5386\u5065\u503c<\/li><li><strong>\u9700\u8981\u914d\u5408for\u2026of\u4f7f\u7528<\/strong><\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u904d\u5386\u573a\u666f\nlet arr = &#91;'a','b','c','d','e'];\nfor(let v of arr.values()){\n  console.log(v) \/\/&#91;a,b,c,d,e]\n}\nfor(let v of arr.values()){\n  console.log(v) \/\/&#91;0,1,2,3,4]\n}\nfor(let &#91;k,v] of arr.entries()){\n   console.log(k,v)  \/\/\u4e0b\u6807\u52a0value\n}<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">inclides<\/h2>\n\n\n\n<p>\u6570\u7ec4\u67e5\u627e,\u8fd4\u56debool\u503c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>let arr = &#91;'a','b','c','d','e'];\nconsole.log(arr.includes(\"a\"))<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u65b0\u589e\u6570\u7ec4\u5c5e\u6027<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">map<\/h2>\n\n\n\n<p>map\u8fd4\u56de\u6570\u7ec4\u6bcf\u4e00\u9879\u9010\u4e2a\u8c03\u7528fun\u65b9\u6cd5,\u7a7a\u6570\u7ec4\u9664\u5916,\u4e0d\u4f1a\u6539\u53d8\u539f\u6570\u7ec4 <strong>\u53ef\u8fd4\u56de\u503c<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u53c2\u6570\u8bf4\u660e<\/li><li>\u5f53\u524d\u9879<\/li><li>\u5f53\u524d\u9879\u7684\u4e0b\u6807<\/li><li>\u539f\u6570\u7ec4(\u53ef\u8fd4\u56de\u503c)<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>var newarr = arr.map((elem,index,arr)=&gt;{\u6267\u884c\u8bed\u53e5})<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">forEach<\/h2>\n\n\n\n<p>forEach\u4f1a\u5c06\u6570\u7ec4\u6bcf\u4e00\u9879\u9010\u5404\u8c03\u7528fun\u65b9\u6cd5\uff0c\u7a7a\u6570\u7ec4\u9664\u5916,\u5207\u4e0d\u4f1a\u6539\u53d8\u539f\u6570\u7ec4\uff1b<strong>\u4e0d\u53ef\u8fd4\u56de\u503c<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u53c2\u6570\u8bf4\u660e<\/li><li>\u5f53\u524d\u9879<\/li><li>\u5f53\u524d\u9879\u7684\u4e0b\u6807<\/li><li>\u539f\u6570\u7ec4<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>var newarr = arr.forEach(function(elem,index,arr){\u6267\u884c\u8bed\u53e5})<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">filter<\/h2>\n\n\n\n<p>\u8fc7\u6ee4\u6570\u7ec4\u5143\u7d20\u8fd4\u56de\u6ee1\u8db3\u5143\u7d20\u7684\u6570\u7ec4<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.filter(function(elemen){\u6267\u884c\u8bed\u53e5})<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">some<\/h2>\n\n\n\n<p>\u5c06\u6240\u6709\u6570\u7ec4\u6210\u5458\u4e00\u6b21\u6267\u884c\u6b64\u65b9\u6cd5\uff0c\u53ea\u8981\u4e00\u4e2a\u8fd4\u56detrue\u5c06\u8fd4\u56detrue\u5426\u5219\u8fd4\u56defalse<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.some(function(elem,index,arr){return \u6761\u4ef6})<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">every<\/h2>\n\n\n\n<p>\u5c06\u6240\u6709\u6210\u5458\u4e00\u6b21\u6267\u884c\u6b64\u65b9\u6cd5\uff0c\u53ea\u6709\u90fd\u8fd4\u56detrue\u624d\u4f1a\u8fd4\u56detrue\u5426\u5219\u8fd4\u56defalse<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.every(function(elem,index,arr){return \u6761\u4ef6})<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">reduce<\/h2>\n\n\n\n<p>\u4f9d\u6b21\u5904\u7406\u6570\u7ec4\u7684\u6bcf\u4e2a\u6210\u5458\uff0c\u6700\u7ec8\u7d2f\u8ba1\u4e3a\u4e00\u4e2a\u503c\uff08\u4ece\u5de6\u5230\u53f3\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.reduce(function(a,b){return \u6267\u884c\u8bed\u53e5},base)<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">reduceRight<\/h2>\n\n\n\n<p>\u4f9d\u6b21\u5904\u7406\u6570\u7ec4\u7684\u6bcf\u4e2a\u6210\u5458\uff0c\u6700\u7ec8\u7d2f\u8ba1\u4e3a\u4e00\u4e2a\u503c\uff08\u4ece\u53f3\u5230\u5de6\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>arr.reduceRight(function(a,b){return \u6267\u884c\u8bed\u53e5})<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>isArray \u5224\u65ad\u7684\u662f\u5426\u4e3a\u6570\u7ec4\uff0ctypof\u53ea\u80fd\u8fa8\u522b\u57fa\u672c\u7c7b\u578b\u7684\u503c indexOf \u67e5\u627e\u6570\u7ec4\u4e2d\u7684\u5143\u7d20,\u6709\u5219\u8fd4\u56de\u4e0b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-62","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts\/62","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=62"}],"version-history":[{"count":0,"href":"https:\/\/gjweb.top\/index.php?rest_route=\/wp\/v2\/posts\/62\/revisions"}],"wp:attachment":[{"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=62"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=62"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gjweb.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=62"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}