{"id":2133,"date":"2025-03-01T00:05:03","date_gmt":"2025-02-28T16:05:03","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2133"},"modified":"2025-03-01T00:05:03","modified_gmt":"2025-02-28T16:05:03","slug":"javascript-array%ef%bc%88%e6%95%b0%e7%bb%84%ef%bc%89-%e5%af%b9%e8%b1%a1","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/01\/javascript-array%ef%bc%88%e6%95%b0%e7%bb%84%ef%bc%89-%e5%af%b9%e8%b1%a1\/","title":{"rendered":"JavaScript\u00a0Array\uff08\u6570\u7ec4\uff09\u00a0\u5bf9\u8c61"},"content":{"rendered":"\n<p>\u5728 JavaScript \u4e2d\uff0c<strong>\u6570\u7ec4\uff08Array\uff09<\/strong> \u662f\u4e00\u79cd\u7528\u4e8e\u5b58\u50a8\u591a\u4e2a\u503c\u7684\u5bf9\u8c61\u3002\u6570\u7ec4\u662f\u6709\u5e8f\u7684\u96c6\u5408\uff0c\u53ef\u4ee5\u5305\u542b\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5982\u6570\u5b57\u3001\u5b57\u7b26\u4e32\u3001\u5bf9\u8c61\u3001\u751a\u81f3\u5176\u4ed6\u6570\u7ec4\u3002\u6570\u7ec4\u53ef\u4ee5\u52a8\u6001\u6539\u53d8\u5927\u5c0f\uff0c\u975e\u5e38\u7075\u6d3b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong>\u521b\u5efa\u6570\u7ec4<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1.1 <strong>\u4f7f\u7528\u5b57\u9762\u91cf\uff08\u63a8\u8350\uff09<\/strong><\/h4>\n\n\n\n<p>\u6570\u7ec4\u5b57\u9762\u91cf\u662f\u6700\u5e38\u7528\u4e14\u63a8\u8350\u7684\u65b9\u5f0f\u6765\u521b\u5efa\u6570\u7ec4\u3002\u53ef\u4ee5\u76f4\u63a5\u7528\u65b9\u62ec\u53f7 <code>[]<\/code> \u6765\u521b\u5efa\u4e00\u4e2a\u6570\u7ec4\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr1 = &#91;1, 2, 3, 4, 5];\nconst arr2 = &#91;'apple', 'banana', 'orange'];\nconst arr3 = &#91;1, 'apple', true, { key: 'value' }];\nconsole.log(arr1);  \/\/ \u8f93\u51fa\uff1a&#91;1, 2, 3, 4, 5]\nconsole.log(arr2);  \/\/ \u8f93\u51fa\uff1a&#91;\"apple\", \"banana\", \"orange\"]<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">1.2 <strong>\u4f7f\u7528 <code>new Array()<\/code> \u6784\u9020\u51fd\u6570<\/strong><\/h4>\n\n\n\n<p>\u867d\u7136\u53ef\u4ee5\u901a\u8fc7 <code>new Array()<\/code> \u6765\u521b\u5efa\u6570\u7ec4\uff0c\u4f46\u8fd9\u901a\u5e38\u4e0d\u63a8\u8350\uff0c\u56e0\u4e3a\u5b83\u6709\u4e00\u4e9b\u6f5c\u5728\u7684\u9677\u9631\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr4 = new Array(5);  \/\/ \u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a 5 \u7684\u7a7a\u6570\u7ec4\uff08\u6570\u7ec4\u5143\u7d20\u4e3a undefined\uff09\nconsole.log(arr4);  \/\/ \u8f93\u51fa\uff1a&#91; &lt;5 empty items&gt; ]\nconst arr5 = new Array(1, 2, 3);  \/\/ \u521b\u5efa\u4e00\u4e2a\u5305\u542b 1, 2, 3 \u7684\u6570\u7ec4\nconsole.log(arr5);  \/\/ \u8f93\u51fa\uff1a&#91;1, 2, 3]<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">1.3 <strong>\u901a\u8fc7 <code>Array.of()<\/code><\/strong><\/h4>\n\n\n\n<p><code>Array.of()<\/code> \u65b9\u6cd5\u7528\u4e8e\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u5b9e\u4f8b\uff0c\u5176\u5143\u7d20\u4e3a\u4f20\u5165\u7684\u53c2\u6570\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr6 = Array.of(1, 2, 3, 4);\nconsole.log(arr6);  \/\/ \u8f93\u51fa\uff1a&#91;1, 2, 3, 4]<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">1.4 <strong>\u901a\u8fc7 <code>Array.from()<\/code><\/strong><\/h4>\n\n\n\n<p><code>Array.from()<\/code> \u53ef\u4ee5\u4ece\u7c7b\u6570\u7ec4\u5bf9\u8c61\uff08\u5982 NodeList \u6216 arguments\uff09\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u6216\u8005\u5c06\u5176\u4ed6\u53ef\u8fed\u4ee3\u5bf9\u8c61\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const str = 'hello';\nconst arr7 = Array.from(str);  \/\/ \u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u6570\u7ec4\nconsole.log(arr7);  \/\/ \u8f93\u51fa\uff1a&#91;'h', 'e', 'l', 'l', 'o']<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong>\u6570\u7ec4\u7684\u5c5e\u6027\u548c\u65b9\u6cd5<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">2.1 <strong>\u6570\u7ec4\u7684\u57fa\u672c\u5c5e\u6027<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>length<\/code>\uff1a\u8fd4\u56de\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3, 4];\nconsole.log(arr.length);  \/\/ \u8f93\u51fa\uff1a4<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">2.2 <strong>\u6570\u7ec4\u7684\u65b9\u6cd5<\/strong><\/h4>\n\n\n\n<p>\u6570\u7ec4\u5bf9\u8c61\u63d0\u4f9b\u4e86\u5f88\u591a\u65b9\u6cd5\u6765\u64cd\u4f5c\u6570\u7ec4\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">2.2.1 <strong>\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20<\/strong><\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>push()<\/code>\uff1a\u5411\u6570\u7ec4\u7684\u672b\u5c3e\u6dfb\u52a0\u4e00\u4e2a\u6216\u591a\u4e2a\u5143\u7d20\uff0c\u5e76\u8fd4\u56de\u65b0\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3];\narr.push(4, 5);\nconsole.log(arr);  \/\/ \u8f93\u51fa\uff1a&#91;1, 2, 3, 4, 5]<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>pop()<\/code>\uff1a\u5220\u9664\u6570\u7ec4\u672b\u5c3e\u7684\u5143\u7d20\uff0c\u5e76\u8fd4\u56de\u88ab\u5220\u9664\u7684\u5143\u7d20\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3];\nconst removedElement = arr.pop();\nconsole.log(arr);  \/\/ \u8f93\u51fa\uff1a&#91;1, 2]\nconsole.log(removedElement);  \/\/ \u8f93\u51fa\uff1a3<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>shift()<\/code>\uff1a\u5220\u9664\u6570\u7ec4\u5f00\u5934\u7684\u5143\u7d20\uff0c\u5e76\u8fd4\u56de\u88ab\u5220\u9664\u7684\u5143\u7d20\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3];\nconst removedFirstElement = arr.shift();\nconsole.log(arr);  \/\/ \u8f93\u51fa\uff1a&#91;2, 3]\nconsole.log(removedFirstElement);  \/\/ \u8f93\u51fa\uff1a1<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>unshift()<\/code>\uff1a\u5728\u6570\u7ec4\u5f00\u5934\u6dfb\u52a0\u4e00\u4e2a\u6216\u591a\u4e2a\u5143\u7d20\uff0c\u5e76\u8fd4\u56de\u65b0\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3];\narr.unshift(0);\nconsole.log(arr);  \/\/ \u8f93\u51fa\uff1a&#91;0, 1, 2, 3]<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">2.2.2 <strong>\u67e5\u627e\u5143\u7d20<\/strong><\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>indexOf()<\/code>\uff1a\u8fd4\u56de\u6570\u7ec4\u4e2d\u67d0\u4e2a\u5143\u7d20\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e\uff0c\u5982\u679c\u627e\u4e0d\u5230\u8fd4\u56de <code>-1<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3, 4, 5];\nconsole.log(arr.indexOf(3));  \/\/ \u8f93\u51fa\uff1a2\nconsole.log(arr.indexOf(6));  \/\/ \u8f93\u51fa\uff1a-1<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>lastIndexOf()<\/code>\uff1a\u8fd4\u56de\u6570\u7ec4\u4e2d\u67d0\u4e2a\u5143\u7d20\u6700\u540e\u4e00\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3, 4, 5, 3];\nconsole.log(arr.lastIndexOf(3));  \/\/ \u8f93\u51fa\uff1a5<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>includes()<\/code>\uff1a\u68c0\u67e5\u6570\u7ec4\u4e2d\u662f\u5426\u5305\u542b\u67d0\u4e2a\u5143\u7d20\uff0c\u8fd4\u56de\u5e03\u5c14\u503c\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3];\nconsole.log(arr.includes(2));  \/\/ \u8f93\u51fa\uff1atrue\nconsole.log(arr.includes(4));  \/\/ \u8f93\u51fa\uff1afalse<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">2.2.3 <strong>\u64cd\u4f5c\u6570\u7ec4\u4e2d\u7684\u5143\u7d20<\/strong><\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>map()<\/code>\uff1a\u901a\u8fc7\u7ed9\u5b9a\u7684\u51fd\u6570\u5904\u7406\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\uff0c\u8fd4\u56de\u5904\u7406\u540e\u7684\u65b0\u6570\u7ec4\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3];\nconst doubled = arr.map(x =&gt; x * 2);\nconsole.log(doubled);  \/\/ \u8f93\u51fa\uff1a&#91;2, 4, 6]<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>filter()<\/code>\uff1a\u6839\u636e\u6761\u4ef6\u7b5b\u9009\u51fa\u7b26\u5408\u6761\u4ef6\u7684\u5143\u7d20\uff0c\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3, 4, 5];\nconst evenNumbers = arr.filter(x =&gt; x % 2 === 0);\nconsole.log(evenNumbers);  \/\/ \u8f93\u51fa\uff1a&#91;2, 4]<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>forEach()<\/code>\uff1a\u5bf9\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u4e00\u6b21\u7ed9\u5b9a\u7684\u51fd\u6570\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3];\narr.forEach(x =&gt; console.log(x * 2));\n\/\/ \u8f93\u51fa\uff1a\n\/\/ 2\n\/\/ 4\n\/\/ 6<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>reduce()<\/code>\uff1a\u4ece\u6570\u7ec4\u7684\u5de6\u4fa7\u5f00\u59cb\u7d2f\u8ba1\u5904\u7406\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\uff0c\u8fd4\u56de\u4e00\u4e2a\u6700\u7ec8\u7684\u8ba1\u7b97\u7ed3\u679c\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3, 4];\nconst sum = arr.reduce((accumulator, currentValue) =&gt; accumulator + currentValue, 0);\nconsole.log(sum);  \/\/ \u8f93\u51fa\uff1a10<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>reduceRight()<\/code>\uff1a\u4e0e <code>reduce()<\/code> \u7c7b\u4f3c\uff0c\u4f46\u4ece\u6570\u7ec4\u7684\u53f3\u4fa7\u5f00\u59cb\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3, 4];\nconst sumRight = arr.reduceRight((accumulator, currentValue) =&gt; accumulator + currentValue, 0);\nconsole.log(sumRight);  \/\/ \u8f93\u51fa\uff1a10<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">2.2.4 <strong>\u6570\u7ec4\u6392\u5e8f\u548c\u53cd\u8f6c<\/strong><\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>sort()<\/code>\uff1a\u6309\u5b57\u5178\u987a\u5e8f\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\uff08\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4f1a\u5c06\u6570\u7ec4\u5143\u7d20\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u8fdb\u884c\u6bd4\u8f83\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;5, 3, 8, 1];\narr.sort();\nconsole.log(arr);  \/\/ \u8f93\u51fa\uff1a&#91;1, 3, 5, 8]<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>reverse()<\/code>\uff1a\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u53cd\u8f6c\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3, 4];\narr.reverse();\nconsole.log(arr);  \/\/ \u8f93\u51fa\uff1a&#91;4, 3, 2, 1]<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">2.2.5 <strong>\u6570\u7ec4\u62c6\u5206\u548c\u8fde\u63a5<\/strong><\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>slice()<\/code>\uff1a\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\uff0c\u662f\u539f\u6570\u7ec4\u7684\u4e00\u90e8\u5206\uff0c\u4e0d\u6539\u53d8\u539f\u6570\u7ec4\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3, 4, 5];\nconst sliced = arr.slice(1, 4);\nconsole.log(sliced);  \/\/ \u8f93\u51fa\uff1a&#91;2, 3, 4]<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>splice()<\/code>\uff1a\u53ef\u4ee5\u4ece\u6570\u7ec4\u4e2d\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\uff0c\u76f4\u63a5\u4fee\u6539\u539f\u6570\u7ec4\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 3, 4, 5];\narr.splice(2, 1, 'a', 'b');  \/\/ \u4ece\u7d22\u5f152\u5220\u96641\u4e2a\u5143\u7d20\uff0c\u5e76\u63d2\u5165 'a' \u548c 'b'\nconsole.log(arr);  \/\/ \u8f93\u51fa\uff1a&#91;1, 2, 'a', 'b', 4, 5]<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>concat()<\/code>\uff1a\u5408\u5e76\u4e24\u4e2a\u6216\u591a\u4e2a\u6570\u7ec4\uff0c\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr1 = &#91;1, 2];\nconst arr2 = &#91;3, 4];\nconst arr3 = arr1.concat(arr2);\nconsole.log(arr3);  \/\/ \u8f93\u51fa\uff1a&#91;1, 2, 3, 4]<\/code><\/pre>\n\n\n\n<h5 class=\"wp-block-heading\">2.2.6 <strong>\u6570\u7ec4\u7684\u5176\u4ed6\u65b9\u6cd5<\/strong><\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>find()<\/code>\uff1a\u8fd4\u56de\u6570\u7ec4\u4e2d\u7b2c\u4e00\u4e2a\u7b26\u5408\u6761\u4ef6\u7684\u5143\u7d20\uff0c\u5982\u679c\u6ca1\u6709\u627e\u5230\uff0c\u8fd4\u56de <code>undefined<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;5, 10, 15];\nconst found = arr.find(x =&gt; x &gt; 8);\nconsole.log(found);  \/\/ \u8f93\u51fa\uff1a10<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>findIndex()<\/code>\uff1a\u8fd4\u56de\u6570\u7ec4\u4e2d\u7b2c\u4e00\u4e2a\u7b26\u5408\u6761\u4ef6\u7684\u5143\u7d20\u7684\u7d22\u5f15\uff0c\u5982\u679c\u6ca1\u6709\u627e\u5230\uff0c\u8fd4\u56de <code>-1<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;5, 10, 15];\nconst index = arr.findIndex(x =&gt; x &gt; 8);\nconsole.log(index);  \/\/ \u8f93\u51fa\uff1a1<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>join()<\/code>\uff1a\u5c06\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u8fde\u63a5\u6210\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u5143\u7d20\u4e4b\u95f4\u7528\u6307\u5b9a\u7684\u5206\u9694\u7b26\u5206\u9694\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;'apple', 'banana', 'cherry'];\nconsole.log(arr.join(', '));  \/\/ \u8f93\u51fa\uff1a\"\n\napple, banana, cherry\"<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. <strong>\u5b9e\u6218\u6848\u4f8b\uff1a\u6570\u7ec4\u7684\u5b9e\u9645\u5e94\u7528<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">3.1 <strong>\u8ba1\u7b97\u6570\u7ec4\u4e2d\u7684\u5e73\u5747\u503c<\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>const numbers = &#91;10, 20, 30, 40, 50];\nconst average = numbers.reduce((sum, num) =&gt; sum + num, 0) \/ numbers.length;\nconsole.log(average);  \/\/ \u8f93\u51fa\uff1a30<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">3.2 <strong>\u53bb\u91cd\u6570\u7ec4\u4e2d\u7684\u91cd\u590d\u5143\u7d20<\/strong><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>const arr = &#91;1, 2, 2, 3, 3, 4, 5];\nconst uniqueArr = &#91;...new Set(arr)];\nconsole.log(uniqueArr);  \/\/ \u8f93\u51fa\uff1a&#91;1, 2, 3, 4, 5]<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">4. <strong>\u603b\u7ed3<\/strong><\/h3>\n\n\n\n<p>JavaScript \u6570\u7ec4\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u5177\u6709\u4e30\u5bcc\u7684\u5185\u7f6e\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8fdb\u884c\u5143\u7d20\u7684\u64cd\u4f5c\u3001\u67e5\u627e\u3001\u4fee\u6539\u548c\u6392\u5e8f\u7b49\u591a\u79cd\u64cd\u4f5c\u3002\u638c\u63e1\u6570\u7ec4\u7684\u5e38\u7528\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u4f60\u5904\u7406\u6570\u636e\u7684\u6548\u7387\u3002\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 JavaScript \u4e2d\uff0c\u6570\u7ec4\uff08Array\uff09 \u662f\u4e00\u79cd\u7528\u4e8e\u5b58\u50a8\u591a\u4e2a\u503c\u7684\u5bf9\u8c61\u3002\u6570\u7ec4\u662f\u6709\u5e8f\u7684\u96c6\u5408\uff0c\u53ef\u4ee5\u5305\u542b\u4e0d\u540c\u7c7b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"class_list":["post-2133","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2133","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2133"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2133\/revisions"}],"predecessor-version":[{"id":2134,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2133\/revisions\/2134"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2133"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2133"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}