{"id":527,"date":"2011-10-09T18:30:42","date_gmt":"2011-10-09T10:30:42","guid":{"rendered":"https:\/\/yanjingang.com\/blog\/?p=527"},"modified":"2016-03-09T18:31:19","modified_gmt":"2016-03-09T10:31:19","slug":"js-%e6%95%b0%e7%bb%84%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/yanjingang.com\/blog\/?p=527","title":{"rendered":"js \u6570\u7ec4\u51fd\u6570"},"content":{"rendered":"

concat<\/h1>\n

\u5c06\u53c2\u6570\u5217\u8868\u8fde\u63a5\u5230\u539f\u6570\u7ec4\u540e\u9762\u5f62\u6210\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u5e76\u8fd4\u56de\uff0c\u539f\u6709\u6570\u7ec4\u4e0d\u53d7\u5f71\u54cd\u3002<\/p>\n

var arr = [“a”<\/span>,“b”<\/span>,“c”<\/span>];
\nvar arr1 = arr.concat(“d”<\/span>,“e”<\/span>);
\n\/\/arr1 = [“a”,”b”,”c”,”d”,”e”]<\/span><\/div>\n

<\/a>join<\/h1>\n

\u4ee5\u6307\u5b9a\u7684\u5b57\u7b26\u4f5c\u4e3a\u5206\u5272\u7b26\uff0c\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\uff0c\u5f53\u6307\u5b9a\u5b57\u7b26\u4e3a\u9017\u53f7\u65f6\uff0c\u5176\u4f5c\u7528\u548c toString() \u76f8\u540c\u3002<\/p>\n

var str1 = arr.join(“,”<\/span>);
\n\/\/str1 = “a,b,c”<\/span><\/div>\n

<\/a>pop<\/h1>\n

\u901a\u4fd7\u7684\u8bb2\uff0c\u5c31\u662f\u5f39\u51fa\u6570\u7ec4\u7684\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u3002\u7ed3\u5408\u4e0b\u9762\u7684 push \u65b9\u6cd5\uff0c\u4f7f\u5f97\u5c06\u6570\u7ec4\u4f5c\u4e3a\u6808\u6765\u4f7f\u7528\u6210\u4e3a\u53ef\u80fd\u3002pop \u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u503c\uff0c\u5e76\u5c06 length \u5c5e\u6027\u51cf \uff11\uff0c\u5373\u8fd4\u56de\u540e\u7acb\u5373\u4e22\u5931\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n

var item1 = arr.pop();
\n\/\/item1 = “c”<\/span><\/div>\n

<\/a>push<\/h1>\n

\u5c06\u53c2\u6570\u6dfb\u52a0\u5230\u6570\u7ec4\u7684\u7ed3\u5c3e\u3002<\/p>\n

arr.push(“d”<\/span>,“e”<\/span>);
\nalert(arr);
\n\/\/arr = [“a”,”b”,”c”,”d”,”e”]<\/span><\/div>\n

<\/a>reverse<\/h1>\n

\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u53cd\u8f6c\u6392\u5217\uff0c\u8fd9\u4e2a\u64cd\u4f5c\u662f\u5728\u539f\u6709\u6570\u7ec4\u4e0a\u7ecf\u884c\u64cd\u4f5c\uff0c\u540c\u65f6\u4e5f\u8fd4\u56de\u6570\u7ec4\u672c\u8eab\u3002<\/p>\n

arr.reverse();
\nalert(arr);
\n\/\/arr = [“c”.”b”,”a”]<\/span><\/div>\n

<\/a>shift<\/h1>\n

\u79fb\u53bb\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\uff0c\u5e76\u8fd4\u56de\u8fd9\u4e2a\u5143\u7d20\u7684\u503c\u3002\u8fd9\u4e2a\u65b9\u6cd5\u7684\u6027\u8d28\u548c pop \u65b9\u6cd5\u5f88\u7c7b\u4f3c\uff0cpop \u65b9\u6cd5\u662f\u79fb\u53bb\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n

var item1 = arr.shift();
\n\/\/item1 = “a”<\/span><\/div>\n

<\/a>unshift<\/h1>\n

\u5c06\u53c2\u6570\u5217\u8868\u63d2\u5165\u5230\u6570\u7ec4\u7684\u5f00\u5934\u3002\u5176\u6027\u8d28\u548c push \u65b9\u6cd5\u7c7b\u578b\uff0c\u4f46 push \u65b9\u6cd5\u662f\u5c06\u5143\u7d20\u6dfb\u52a0\u5230\u6570\u7ec4\u7684\u7ed3\u5c3e\u3002<\/p>\n

arr.unshift(“d”<\/span>,“e”<\/span>);
\nalert(arr);
\n\/\/arr = [“d”,”e”,”a”,”b”,”c”]<\/span><\/div>\n

<\/a>slice<\/h1>\n

\u8fd4\u56de\u6570\u7ec4\u5bf9\u8c61\u7684\u4e00\u4e2a\u5b50\u96c6\uff0c\u7d22\u5f15\u4ece\u5f00\u59cb\uff08\u5305\u62ec\u5f00\u59cb\u4f4d\u7f6e\u5143\u7d20\uff09\uff0c\u5230\u7ed3\u675f\uff08\u4e0d\u5305\u62ec\u7ed3\u675f\u4f4d\u7f6e\u5143\u7d20),\u539f\u6709\u6570\u7ec4\u4e0d\u53d7\u5f71\u54cd\u3002\u5f53 \u5f00\u59cb\u6216\u8005\u7ed3\u675f\u4e3a\u8d1f\u6570\u65f6\uff0c\u5219\u4f7f\u7528\u4ed6\u4eec\u52a0\u4e0a\u6570\u7ec4\u957f\u5ea6\u540e\u7684\u503c\u3002\u5982\u679c\u7ed3\u675f\u5c0f\u4e8e\u7b49\u4e8e\u5f00\u59cb\uff0c\u5c06\u8fd4\u56de\u7a7a\u6570\u7ec4\u3002<\/p>\n

var item1 = arr.slice(1<\/span>,2<\/span>);
\n\/\/item1 = “b”<\/span>
\nvar item2 = arr.slice(-2<\/span>,-1<\/span>);
\n\/\/item2 = “b”<\/span><\/div>\n

<\/a>splice<\/h1>\n

\u4ece\u6570\u7ec4\u5bf9\u8c61\u4e2d\u79fb\u9664\u6307\u5b9a\u957f\u5ea6\u7684\u5143\u7d20\uff0c\u5e76\u66ff\u6362\u4e3a\u65b0\u7684\u5143\u7d20\uff08\u76f8\u5f53\u4e8e\u6267\u884c\u66ff\u6362\u64cd\u4f5c\uff09\u3002\u5982\u679c\u6ca1\u6709\u6307\u5b9a\u65b0\u7684\u5143\u7d20\uff0c\u5219\u76f8\u5f53\u4e8e\u6267\u884c\u5220\u9664\u64cd\u4f5c\u3002\u8fd4\u56de\u88ab\u5220\u9664\u5143\u7d20\u7ec4\u6210\u7684\u6570\u7ec4\u3002<\/p>\n

var arr1 = arr.splice(1<\/span>,2<\/span>,“d”<\/span>,“e”<\/span>);
\n\/\/arr1 = [“b”,”c”]<\/span>
\nalert(arr);\/\/[“a”,”d”,”e”]<\/span>
\nvar arr2 = arr.splice(1<\/span>,2<\/span>);
\n\/\/arr2 = [“d”,”e”]<\/span>
\nalert(arr);
\n\/\/arr = [“a”]<\/span><\/div>\n","protected":false},"excerpt":{"rendered":"

concat \u5c06\u53c2\u6570\u5217\u8868\u8fde\u63a5\u5230\u539f\u6570\u7ec4\u540e\u9762\u5f62\u6210\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u5e76\u8fd4\u56de\uff0c\u539f\u6709\u6570\u7ec4\u4e0d\u53d7\u5f71\u54cd\u3002 var arr = [&# […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[26],"tags":[286,27,285],"_links":{"self":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/527"}],"collection":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=527"}],"version-history":[{"count":0,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/527\/revisions"}],"wp:attachment":[{"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=527"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=527"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yanjingang.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}