{"id":1378,"date":"2024-06-02T22:28:56","date_gmt":"2024-06-02T22:28:56","guid":{"rendered":""},"modified":"2024-06-05T03:09:46","modified_gmt":"2024-06-04T19:09:46","slug":"javascript%e4%b8%93%e9%a2%98%e4%b9%8b%e6%b7%b1%e6%b5%85%e6%8b%b7%e8%b4%9d","status":"publish","type":"post","link":"https:\/\/www.lccc.top\/?p=1378","title":{"rendered":"JavaScript\u4e13\u9898\u4e4b\u6df1\u6d45\u62f7\u8d1d"},"content":{"rendered":"\n

\u524d\u8a00<\/h2>\n

\u62f7\u8d1d\u4e5f\u662f\u9762\u8bd5\u7ecf\u5178\u5450\uff01<\/p>\n

\u6570\u7ec4\u7684\u6d45\u62f7\u8d1d<\/h2>\n

\u5982\u679c\u662f\u6570\u7ec4\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u6570\u7ec4\u7684\u4e00\u4e9b\u65b9\u6cd5\u6bd4\u5982\uff1aslice\u3001concat \u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\u7684\u7279\u6027\u6765\u5b9e\u73b0\u62f7\u8d1d\u3002<\/p>\n

\u6bd4\u5982\uff1a<\/p>\n

<\/p>\n
var<\/span> arr<\/span> =<\/span> [<\/span>'old'<\/span>,<\/span> 1<\/span>,<\/span> true<\/span>,<\/span> null<\/span>,<\/span> undefined<\/span>]<\/span>;<\/span>\n\nvar<\/span> new_arr<\/span> =<\/span> arr<\/span>.<\/span>concat<\/span>(<\/span>)<\/span>;<\/span>\n\nnew_arr<\/span>[<\/span>0<\/span>]<\/span> =<\/span> 'new'<\/span>;<\/span>\n\nconsole<\/span>.<\/span>log<\/span>(<\/span>arr<\/span>)<\/span> \/\/ [\"old\", 1, true, null, undefined]<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>new_arr<\/span>)<\/span> \/\/ [\"new\", 1, true, null, undefined]<\/span><\/pre>\n<\/div>\n
\u7528 slice \u53ef\u4ee5\u8fd9\u6837\u505a\uff1a<\/p>\n
\n
var<\/span> new_arr<\/span> =<\/span> arr<\/span>.<\/span>slice<\/span>(<\/span>)<\/span>;<\/span><\/pre>\n<\/div>\n
\u4f46\u662f\u5982\u679c\u6570\u7ec4\u5d4c\u5957\u4e86\u5bf9\u8c61\u6216\u8005\u6570\u7ec4\u7684\u8bdd\uff0c\u6bd4\u5982\uff1a<\/p>\n
<\/p>\n
var<\/span> arr<\/span> =<\/span> [<\/span>{<\/span>old<\/span>: 'old'<\/span>}<\/span>,<\/span> [<\/span>'old'<\/span>]<\/span>]<\/span>;<\/span>\n\nvar<\/span> new_arr<\/span> =<\/span> arr<\/span>.<\/span>concat<\/span>(<\/span>)<\/span>;<\/span>\n\narr<\/span>[<\/span>0<\/span>]<\/span>.<\/span>old<\/span> =<\/span> 'new'<\/span>;<\/span>\narr<\/span>[<\/span>1<\/span>]<\/span>[<\/span>0<\/span>]<\/span> =<\/span> 'new'<\/span>;<\/span>\n\nconsole<\/span>.<\/span>log<\/span>(<\/span>arr<\/span>)<\/span> \/\/ [{old: 'new'}, ['new']]<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>new_arr<\/span>)<\/span> \/\/ [{old: 'new'}, ['new']]<\/span><\/pre>\n<\/div>\n
\u6211\u4eec\u4f1a\u53d1\u73b0\uff0c\u65e0\u8bba\u662f\u65b0\u6570\u7ec4\u8fd8\u662f\u65e7\u6570\u7ec4\u90fd\u53d1\u751f\u4e86\u53d8\u5316\uff0c\u4e5f\u5c31\u662f\u8bf4\u4f7f\u7528 concat \u65b9\u6cd5\uff0c\u514b\u9686\u7684\u5e76\u4e0d\u5f7b\u5e95\u3002<\/p>\n
\u5982\u679c\u6570\u7ec4\u5143\u7d20\u662f\u57fa\u672c\u7c7b\u578b\uff0c\u5c31\u4f1a\u62f7\u8d1d\u4e00\u4efd\uff0c\u4e92\u4e0d\u5f71\u54cd\uff0c\u800c\u5982\u679c\u662f\u5bf9\u8c61\u6216\u8005\u6570\u7ec4\uff0c\u5c31\u4f1a\u53ea\u62f7\u8d1d\u5bf9\u8c61\u548c\u6570\u7ec4\u7684\u5f15\u7528\uff0c\u8fd9\u6837\u6211\u4eec\u65e0\u8bba\u5728\u65b0\u65e7\u6570\u7ec4\u8fdb\u884c\u4e86\u4fee\u6539\uff0c\u4e24\u8005\u90fd\u4f1a\u53d1\u751f\u53d8\u5316\u3002<\/p>\n
\u6211\u4eec\u628a\u8fd9\u79cd\u590d\u5236\u5f15\u7528\u7684\u62f7\u8d1d\u65b9\u6cd5\u79f0\u4e4b\u4e3a\u6d45\u62f7\u8d1d\uff0c\u4e0e\u4e4b\u5bf9\u5e94\u7684\u5c31\u662f\u6df1\u62f7\u8d1d\uff0c\u6df1\u62f7\u8d1d\u5c31\u662f\u6307\u5b8c\u5168\u7684\u62f7\u8d1d\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5373\u4f7f\u5d4c\u5957\u4e86\u5bf9\u8c61\uff0c\u4e24\u8005\u4e5f\u76f8\u4e92\u5206\u79bb\uff0c\u4fee\u6539\u4e00\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027\uff0c\u4e5f\u4e0d\u4f1a\u5f71\u54cd\u53e6\u4e00\u4e2a\u3002<\/p>\n
\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\u4f7f\u7528 concat \u548c slice \u662f\u4e00\u79cd\u6d45\u62f7\u8d1d\u3002<\/p>\n
\u6570\u7ec4\u7684\u6df1\u62f7\u8d1d<\/h2>\n
\u90a3\u5982\u4f55\u6df1\u62f7\u8d1d\u4e00\u4e2a\u6570\u7ec4\u5462\uff1f\u8fd9\u91cc\u4ecb\u7ecd\u4e00\u4e2a\u6280\u5de7\uff0c\u4e0d\u4ec5\u9002\u7528\u4e8e\u6570\u7ec4\u8fd8\u9002\u7528\u4e8e\u5bf9\u8c61\uff01\u90a3\u5c31\u662f\uff1a<\/p>\n
<\/p>\n
var<\/span> arr<\/span> =<\/span> [<\/span>'old'<\/span>,<\/span> 1<\/span>,<\/span> true<\/span>,<\/span> [<\/span>'old1'<\/span>,<\/span> 'old2'<\/span>]<\/span>,<\/span> {<\/span>old<\/span>: 1<\/span>}<\/span>]<\/span>\n\nvar<\/span> new_arr<\/span> =<\/span> JSON<\/span>.<\/span>parse<\/span>(<\/span> JSON<\/span>.<\/span>stringify<\/span>(<\/span>arr<\/span>)<\/span> )<\/span>;<\/span>\n\nconsole<\/span>.<\/span>log<\/span>(<\/span>new_arr<\/span>)<\/span>;<\/span><\/pre>\n<\/div>\n
\u662f\u4e00\u4e2a\u7b80\u5355\u7c97\u66b4\u7684\u597d\u65b9\u6cd5\uff0c\u5c31\u662f\u6709\u4e00\u4e2a\u95ee\u9898\uff0c\u4e0d\u80fd\u62f7\u8d1d\u51fd\u6570\uff0c\u6211\u4eec\u505a\u4e2a\u8bd5\u9a8c\uff1a<\/p>\n
<\/p>\n
var<\/span> arr<\/span> =<\/span> [<\/span>function<\/span>(<\/span>)<\/span>{<\/span>\n    console<\/span>.<\/span>log<\/span>(<\/span>a<\/span>)<\/span>\n}<\/span>,<\/span> {<\/span>\n    b<\/span>: function<\/span>(<\/span>)<\/span>{<\/span>\n        console<\/span>.<\/span>log<\/span>(<\/span>b<\/span>)<\/span>\n    }<\/span>\n}<\/span>]<\/span>\n\nvar<\/span> new_arr<\/span> =<\/span> JSON<\/span>.<\/span>parse<\/span>(<\/span>JSON<\/span>.<\/span>stringify<\/span>(<\/span>arr<\/span>)<\/span>)<\/span>;<\/span>\n\nconsole<\/span>.<\/span>log<\/span>(<\/span>new_arr<\/span>)<\/span>;<\/span><\/pre>\n<\/div>\n
\u6211\u4eec\u4f1a\u53d1\u73b0 new_arr \u53d8\u6210\u4e86\uff1a<\/p>\n
\"\u4e0d\u80fd\u62f7\u8d1d\u51fd\u6570\"<\/a><\/p>\n
\u6d45\u62f7\u8d1d\u7684\u5b9e\u73b0<\/h2>\n
\u4ee5\u4e0a\u4e09\u4e2a\u65b9\u6cd5 concat\u3001slice\u3001JSON.stringify \u90fd\u7b97\u662f\u6280\u5de7\u7c7b\uff0c\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9879\u76ee\u60c5\u51b5\u9009\u62e9\u4f7f\u7528\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u601d\u8003\u4e0b\u5982\u4f55\u5b9e\u73b0\u4e00\u4e2a\u5bf9\u8c61\u6216\u8005\u6570\u7ec4\u7684\u6d45\u62f7\u8d1d\u3002<\/p>\n
\u60f3\u4e00\u60f3\uff0c\u597d\u50cf\u5f88\u7b80\u5355\uff0c\u904d\u5386\u5bf9\u8c61\uff0c\u7136\u540e\u628a\u5c5e\u6027\u548c\u5c5e\u6027\u503c\u90fd\u653e\u5728\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\u4e0d\u5c31\u597d\u4e86~<\/p>\n
\u55ef\uff0c\u5c31\u662f\u8fd9\u4e48\u7b80\u5355\uff0c\u6ce8\u610f\u51e0\u4e2a\u5c0f\u70b9\u5c31\u53ef\u4ee5\u4e86\uff1a<\/p>\n
<\/p>\n
var<\/span> shallowCopy<\/span> =<\/span> function<\/span>(<\/span>obj<\/span>)<\/span> {<\/span>\n    \/\/ \u53ea\u62f7\u8d1d\u5bf9\u8c61<\/span>\n    if<\/span> (<\/span>typeof<\/span> obj<\/span> !==<\/span> 'object'<\/span>)<\/span> return<\/span>;<\/span>\n    \/\/ \u6839\u636eobj\u7684\u7c7b\u578b\u5224\u65ad\u662f\u65b0\u5efa\u4e00\u4e2a\u6570\u7ec4\u8fd8\u662f\u5bf9\u8c61<\/span>\n    var<\/span> newObj<\/span> =<\/span> obj<\/span> instanceof<\/span> Array<\/span> ? [<\/span>]<\/span> : {<\/span>}<\/span>;<\/span>\n    \/\/ \u904d\u5386obj\uff0c\u5e76\u4e14\u5224\u65ad\u662fobj\u7684\u5c5e\u6027\u624d\u62f7\u8d1d<\/span>\n    for<\/span> (<\/span>var<\/span> key<\/span> in<\/span> obj<\/span>)<\/span> {<\/span>\n        if<\/span> (<\/span>obj<\/span>.<\/span>hasOwnProperty<\/span>(<\/span>key<\/span>)<\/span>)<\/span> {<\/span>\n            newObj<\/span>[<\/span>key<\/span>]<\/span> =<\/span> obj<\/span>[<\/span>key<\/span>]<\/span>;<\/span>\n        }<\/span>\n    }<\/span>\n    return<\/span> newObj<\/span>;<\/span>\n}<\/span><\/pre>\n<\/div>\n
\u6df1\u62f7\u8d1d\u7684\u5b9e\u73b0<\/h2>\n
\u90a3\u5982\u4f55\u5b9e\u73b0\u4e00\u4e2a\u6df1\u62f7\u8d1d\u5462\uff1f\u8bf4\u8d77\u6765\u4e5f\u597d\u7b80\u5355\uff0c\u6211\u4eec\u5728\u62f7\u8d1d\u7684\u65f6\u5019\u5224\u65ad\u4e00\u4e0b\u5c5e\u6027\u503c\u7684\u7c7b\u578b\uff0c\u5982\u679c\u662f\u5bf9\u8c61\uff0c\u6211\u4eec\u9012\u5f52\u8c03\u7528\u6df1\u62f7\u8d1d\u51fd\u6570\u4e0d\u5c31\u597d\u4e86~<\/p>\n
<\/p>\n
var<\/span> deepCopy<\/span> =<\/span> function<\/span>(<\/span>obj<\/span>)<\/span> {<\/span>\n    if<\/span> (<\/span>typeof<\/span> obj<\/span> !==<\/span> 'object'<\/span>)<\/span> return<\/span>;<\/span>\n    var<\/span> newObj<\/span> =<\/span> obj<\/span> instanceof<\/span> Array<\/span> ? [<\/span>]<\/span> : {<\/span>}<\/span>;<\/span>\n    for<\/span> (<\/span>var<\/span> key<\/span> in<\/span> obj<\/span>)<\/span> {<\/span>\n        if<\/span> (<\/span>obj<\/span>.<\/span>hasOwnProperty<\/span>(<\/span>key<\/span>)<\/span>)<\/span> {<\/span>\n            newObj<\/span>[<\/span>key<\/span>]<\/span> =<\/span> typeof<\/span> obj<\/span>[<\/span>key<\/span>]<\/span> ===<\/span> 'object'<\/span> ? deepCopy<\/span>(<\/span>obj<\/span>[<\/span>key<\/span>]<\/span>)<\/span> : obj<\/span>[<\/span>key<\/span>]<\/span>;<\/span>\n        }<\/span>\n    }<\/span>\n    return<\/span> newObj<\/span>;<\/span>\n}<\/span><\/pre>\n<\/div>\n
\u6027\u80fd\u95ee\u9898<\/h2>\n
\u5c3d\u7ba1\u4f7f\u7528\u6df1\u62f7\u8d1d\u4f1a\u5b8c\u5168\u7684\u514b\u9686\u4e00\u4e2a\u65b0\u5bf9\u8c61\uff0c\u4e0d\u4f1a\u4ea7\u751f\u526f\u4f5c\u7528\uff0c\u4f46\u662f\u6df1\u62f7\u8d1d\u56e0\u4e3a\u4f7f\u7528\u9012\u5f52\uff0c\u6027\u80fd\u4f1a\u4e0d\u5982\u6d45\u62f7\u8d1d\uff0c\u5728\u5f00\u53d1\u4e2d\uff0c\u8fd8\u662f\u8981\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8fdb\u884c\u9009\u62e9\u3002<\/p>\n
\u4e0b\u671f\u9884\u544a<\/h2>\n
\u96be\u9053\u5230\u8fd9\u91cc\u5c31\u7ed3\u675f\u4e86\uff1f\u662f\u7684\u3002\u7136\u800c\u672c\u7bc7\u5b9e\u9645\u4e0a\u662f\u4e00\u4e2a\u94fa\u57ab\uff0c\u6211\u4eec\u771f\u6b63\u8981\u770b\u7684\u662f jquery \u7684 extend \u51fd\u6570\u7684\u5b9e\u73b0\uff0c\u4e0b\u4e00\u7bc7\uff0c\u6211\u4eec\u4f1a\u8bb2\u4e00\u8bb2\u5982\u4f55\u4ece\u96f6\u5b9e\u73b0\u4e00\u4e2a jquery \u7684 extend \u51fd\u6570\u3002<\/p>\n
\u4e13\u9898\u7cfb\u5217<\/h2>\n
JavaScript\u4e13\u9898\u7cfb\u5217\u76ee\u5f55\u5730\u5740\uff1ahttps:\/\/github.com\/mqyqingfeng\/Blog<\/a>\u3002<\/p>\n
JavaScript\u4e13\u9898\u7cfb\u5217\u9884\u8ba1\u5199\u4e8c\u5341\u7bc7\u5de6\u53f3\uff0c\u4e3b\u8981\u7814\u7a76\u65e5\u5e38\u5f00\u53d1\u4e2d\u4e00\u4e9b\u529f\u80fd\u70b9\u7684\u5b9e\u73b0\uff0c\u6bd4\u5982\u9632\u6296\u3001\u8282\u6d41\u3001\u53bb\u91cd\u3001\u7c7b\u578b\u5224\u65ad\u3001\u62f7\u8d1d\u3001\u6700\u503c\u3001\u6241\u5e73\u3001\u67ef\u91cc\u3001\u9012\u5f52\u3001\u4e71\u5e8f\u3001\u6392\u5e8f\u7b49\uff0c\u7279\u70b9\u662f\u7814(chao)\u7a76(xi) underscore \u548c jQuery \u7684\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n<\/td>\n
\u6587\u7ae0\u8f6c\u8f7d\u81eahttps:\/\/github.com\/mqyqingfeng\/Blog\/issues\/32<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u524d\u8a00 \u62f7\u8d1d\u4e5f\u662f\u9762\u8bd5\u7ecf\u5178\u5450\uff01 \u6570\u7ec4\u7684\u6d45\u62f7\u8d1d \u5982\u679c\u662f\u6570\u7ec4\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u6570\u7ec4\u7684\u4e00\u4e9b\u65b9\u6cd5\u6bd4\u5982\uff1aslice\u3001concat \u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\u7684\u7279\u6027\u6765\u5b9e\u73b0\u62f7\u8d1d\u3002 \u6bd4\u5982\uff1a var…<\/p>\n
 Read More  Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1378","post","type-post","status-publish","format-standard","hentry","category-learn"],"_links":{"self":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1378"}],"collection":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1378"}],"version-history":[{"count":1,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1378\/revisions"}],"predecessor-version":[{"id":1463,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1378\/revisions\/1463"}],"wp:attachment":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1378"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1378"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}