{"id":1367,"date":"2024-06-02T22:24:46","date_gmt":"2024-06-02T22:24:46","guid":{"rendered":""},"modified":"2024-06-05T03:09:46","modified_gmt":"2024-06-04T19:09:46","slug":"underscore-%e7%b3%bb%e5%88%97%e4%b9%8b%e9%98%b2%e5%86%b2%e7%aa%81%e4%b8%8e-utility-functions","status":"publish","type":"post","link":"https:\/\/www.lccc.top\/?p=1367","title":{"rendered":"underscore \u7cfb\u5217\u4e4b\u9632\u51b2\u7a81\u4e0e Utility Functions"},"content":{"rendered":"\n

\u9632\u51b2\u7a81<\/h2>\n

underscore \u4f7f\u7528 _ \u4f5c\u4e3a\u51fd\u6570\u7684\u6302\u8f7d\u5bf9\u8c61\uff0c\u5982\u679c\u9875\u9762\u4e2d\u5df2\u7ecf\u5b58\u5728\u4e86 _<\/code> \u5bf9\u8c61\uff0cunderscore \u5c31\u4f1a\u8986\u76d6\u8be5\u5bf9\u8c61\uff0c\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n

<\/p>\n
var<\/span> _<\/span> =<\/span> {<\/span>value<\/span>: 1<\/span> }<\/span>\n\n\/\/ \u5f15\u5165 underscore \u540e<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>_<\/span>.<\/span>value<\/span>)<\/span>;<\/span> \/\/ undefined<\/span><\/pre>\n<\/div>\n
\u6240\u4ee5 underscore \u63d0\u4f9b\u4e86 noConflict \u529f\u80fd\uff0c\u53ef\u4ee5\u653e\u5f03 underscore \u7684\u63a7\u5236\u53d8\u91cf _<\/code>\uff0c\u8fd4\u56de underscore \u5bf9\u8c61\u7684\u5f15\u7528\u3002<\/p>\n
<\/p>\n
var<\/span> _<\/span> =<\/span> {<\/span>value<\/span>: 1<\/span> }<\/span>\n\n\/\/ \u5f15\u5165 underscore \u540e<\/span>\n\n\/\/ \u653e\u5f03 \"_\"\uff0c\u4f7f\u7528 \"$\"<\/span>\nvar<\/span> $<\/span> =<\/span> _<\/span>.<\/span>noConflict<\/span>(<\/span>)<\/span>;<\/span>\n\nconsole<\/span>.<\/span>log<\/span>(<\/span>_<\/span>.<\/span>value<\/span>)<\/span>;<\/span> \/\/ 1<\/span>\n\n\/\/ \u4f7f\u7528 underscore \u7684\u65b9\u6cd5<\/span>\n$<\/span>.<\/span>each<\/span>(<\/span>[<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>]<\/span>,<\/span> alert<\/span>)<\/span>;<\/span><\/pre>\n<\/div>\n
\u90a3\u4e48 noConflict \u51fd\u6570\u662f\u5982\u4f55\u5b9e\u73b0\u7684\u5462\uff1f<\/p>\n
\u9996\u5148\uff0c\u5728 underscore \u6267\u884c\u7684\u65f6\u5019\uff0c\u4f1a\u50a8\u5b58\u4e4b\u524d\u7684 _<\/code> \u5bf9\u8c61\uff0c\u7136\u540e\u5f53\u6267\u884c noConflict \u51fd\u6570\u7684\u65f6\u5019\uff0c\u518d\u5c06\u4e4b\u524d\u50a8\u5b58\u7684 _<\/code> \u5bf9\u8c61\u8d4b\u7ed9\u5168\u5c40\u5bf9\u8c61\uff0c\u6700\u540e\u8fd4\u56de underscore \u5bf9\u8c61\u3002\u8fd9\u6837\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5229\u7528\u8fd4\u56de\u7684 underscore \u5bf9\u8c61\u4f7f\u7528 underscore \u63d0\u4f9b\u7684\u5404\u79cd\u65b9\u6cd5\u3002<\/p>\n
<\/p>\n
\/\/ \u6e90\u7801\u4e00\u5f00\u59cb\u7684\u65f6\u5019\u4fbf\u50a8\u5b58\u4e4b\u524d\u7684 _ \u5bf9\u8c61<\/span>\nvar<\/span> previousUnderscore<\/span> =<\/span> root<\/span>.<\/span>_<\/span>;<\/span>\n\n_<\/span>.<\/span>noConflict<\/span> =<\/span> function<\/span>(<\/span>)<\/span> {<\/span>\n    root<\/span>.<\/span>_<\/span> =<\/span> previousUnderscore<\/span>;<\/span>\n    return<\/span> this<\/span>;<\/span>\n}<\/span>;<\/span><\/pre>\n<\/div>\n
\u662f\u7684\uff0c\u5c31\u662f\u8fd9\u4e48\u7b80\u5355\u3002\u4f60\u53ef\u4ee5\u8f7b\u677e\u4e3a\u4f60\u7684\u51fd\u6570\u5e93\u6dfb\u52a0\u9632\u51b2\u7a81\u529f\u80fd\u3002<\/p>\n
\u63a5\u4e0b\u6765\u6211\u4eec\u770b underscore \u4e2d\u7684\u4e00\u4e9b\u529f\u80fd\u51fd\u6570\u3002<\/p>\n
_.identity<\/h2>\n
<\/p>\n
_<\/span>.<\/span>identity<\/span> =<\/span> function<\/span>(<\/span>value<\/span>)<\/span> {<\/span>\n    return<\/span> value<\/span>;<\/span>\n}<\/span>;<\/span><\/pre>\n<\/div>\n
\u770b\u8d77\u6765\u532a\u5937\u6240\u601d\u7684\u4e00\u4e2a\u51fd\u6570\uff0c\u4f20\u5165\u4e00\u4e2a\u503c\uff0c\u7136\u540e\u8fd4\u56de\u8be5\u503c\uff0c\u4e3a\u4ec0\u4e48\u4e0d\u76f4\u63a5\u4f7f\u7528\u8be5\u503c\u5462\uff1f<\/p>\n
\u8fd8\u8bb0\u5f97\u6211\u4eec\u5728\u300aunderscore \u7cfb\u5217\u4e4b\u5185\u90e8\u51fd\u6570 cb \u548c optimizeCb\u300b<\/a>\u4e2d\u63a5\u89e6\u8fc7\u8fd9\u4e2a\u51fd\u6570\u5417\uff1f<\/p>\n
\u5982\u679c\u6211\u4eec\u81ea\u5df1\u7f16\u5199\u4e86\u4e00\u4e2a _.map<\/code> \u51fd\u6570\uff1a<\/p>\n
<\/p>\n
_<\/span>.<\/span>map<\/span> =<\/span> function<\/span>(<\/span>arr<\/span>,<\/span> iteratee<\/span>)<\/span>{<\/span>\n    return<\/span> arr<\/span>.<\/span>map<\/span>(<\/span>iteratee<\/span>)<\/span>\n}<\/span><\/pre>\n<\/div>\n
\u7136\u800c\u5f53\u6211\u4eec\u8fd9\u6837\u4f7f\u7528 _.map([1, 2, 3])<\/code> \u65f6\u4fbf\u4f1a\u62a5\u9519\uff0c\u56e0\u4e3a\u6211\u4eec\u6ca1\u6709\u4f20\u5165 iteratee \u51fd\u6570\uff0c\u7136\u800c\u4f7f\u7528 underscore \u5374\u6ca1\u6709\u95ee\u9898\uff0c\u7ed3\u679c\u662f\u8fd4\u56de\u4e00\u4e2a\u76f8\u540c\u7684\u65b0\u6570\u7ec4\uff0c\u539f\u56e0\u5c31\u5728\u4e8e\u5f53 iteratee \u4e3a undefined \u7684\u65f6\u5019\uff0cunderscore \u89c6\u4e3a\u4f20\u5165\u4e86 _.identity<\/code> \u51fd\u6570\u3002\u5c31\u76f8\u5f53\u4e8e\uff1a<\/p>\n
<\/p>\n
_<\/span>.<\/span>map<\/span> =<\/span> function<\/span>(<\/span>arr<\/span>,<\/span> iteratee<\/span>)<\/span>{<\/span>\n    if<\/span> (<\/span>!<\/span>iteratee<\/span>)<\/span> iteratee<\/span> =<\/span> _<\/span>.<\/span>identity<\/span>\n    return<\/span> arr<\/span>.<\/span>map<\/span>(<\/span>iteratee<\/span>)<\/span>\n}<\/span><\/pre>\n<\/div>\n
\u7b80\u800c\u8a00\u4e4b\uff0c\u5982\u679c\u6211\u4eec\u60f3\u8981\u590d\u5236\u4e00\u4e2a\u6570\u7ec4\uff1a<\/p>\n
\n
var<\/span> clonedArr<\/span> =<\/span> [<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>]<\/span>.<\/span>map<\/span>(<\/span>_<\/span>.<\/span>identity<\/span>)<\/span> \/\/ [1, 2, 3]<\/span><\/pre>\n<\/div>\n
_.constant<\/h2>\n
<\/p>\n
_<\/span>.<\/span>constant<\/span> =<\/span> function<\/span>(<\/span>value<\/span>)<\/span> {<\/span>\n    return<\/span> function<\/span>(<\/span>)<\/span> {<\/span>\n        return<\/span> value<\/span>;<\/span>\n    }<\/span>;<\/span>\n}<\/span>;<\/span><\/pre>\n<\/div>\n
\u8be5\u51fd\u6570\u4f20\u5165\u4e00\u4e2a value\uff0c\u7136\u540e\u8fd4\u56de\u4e00\u4e2a\u8fd4\u56de\u8be5 value \u7684\u51fd\u6570\uff0c\u8fd9\u53c8\u6709\u4ec0\u4e48\u7528\u5462\uff1f\u6211\u4eec\u6765\u770b\u4e2a demo\uff1a<\/p>\n
<\/p>\n
var<\/span> value<\/span> =<\/span> 1<\/span>;<\/span>\nvar<\/span> getValue<\/span> =<\/span> _<\/span>.<\/span>constant<\/span>(<\/span>value<\/span>)<\/span>;<\/span>\n\nvalue<\/span> =<\/span> 2<\/span>;<\/span>\n\ngetValue<\/span>(<\/span>)<\/span>;<\/span> \/\/ 1<\/span>\ngetValue<\/span>(<\/span>)<\/span>;<\/span> \/\/ 1<\/span><\/pre>\n<\/div>\n
\u8fd9\u5f88\u5bb9\u6613\u8ba9\u4eba\u60f3\u5230 ES6 \u7684 const\uff0c\u6211\u4e00\u5f00\u59cb\u4ee5\u4e3a\u5c31\u662f\u7528\u6765\u8868\u793a ES6 \u7684 const \uff0c\u540e\u6765\u770b\u4e86\u8fd9\u4e2a\u51fd\u6570\u8d77\u6e90\u7684 issue\uff0c\u624d\u53d1\u73b0\u5e76\u975e\u5982\u6b64\uff0c\u5b83\u5176\u5b9e\u50cf\u4e0b\u9762\u7684 _.noop \u51fd\u6570\u4e00\u6837\u53ef\u4ee5\u4f5c\u4e3a\u9ed8\u8ba4\u51fd\u6570\u4f7f\u7528\u3002<\/p>\n
\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
\n
_<\/span>.<\/span>select<\/span>(<\/span>collection<\/span>,<\/span> filterFunction<\/span> ||<\/span> function<\/span>(<\/span>)<\/span> {<\/span> return<\/span> true<\/span>;<\/span> }<\/span>)<\/span><\/pre>\n<\/div>\n
\u6211\u4eec\u6839\u636e filterFunction \u7b5b\u9009 collection \u4e2d\u7b26\u5408\u6761\u4ef6\u7684\u5143\u7d20\uff0c\u5982\u679c\u6ca1\u6709\u4f20 filterFunction\uff0c\u6211\u4eec\u5c31\u8fd4\u56de\u6240\u6709\u7684\u5143\u7d20\uff0c\u5982\u679c\u6709 _.constant<\/code> \u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u5176\u7b80\u5316\u4e3a\uff1a<\/p>\n
\n
_<\/span>.<\/span>select<\/span>(<\/span>collection<\/span>,<\/span> filterFunction<\/span> ||<\/span> _<\/span>.<\/span>constant<\/span>(<\/span>true<\/span>)<\/span>)<\/span><\/pre>\n<\/div>\n
\u5c3d\u7ba1\u6ca1\u6709\u4ec0\u4e48\u5927\u7684\u6539\u53d8\uff0c\u4f46\u662f\u8bed\u4e49\u66f4\u52a0\u660e\u786e\u3002<\/p>\n
_.noop<\/h2>\n
\n
_<\/span>.<\/span>noop<\/span> =<\/span> function<\/span>(<\/span>)<\/span>{<\/span>}<\/span>;<\/span><\/pre>\n<\/div>\n
\u4e00\u4e2a\u7a7a\u51fd\u6570\uff0c\u770b\u8d77\u6765\u4f9d\u65e7\u6ca1\u4ec0\u4e48\u7528\u2026\u2026<\/p>\n
noop \u51fd\u6570\u53ef\u4ee5\u7528\u4e8e\u4f5c\u4e3a\u9ed8\u8ba4\u503c\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u7701\u53bb\u662f\u5426\u5b58\u5728\u7684\u5224\u65ad\uff0c\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
<\/p>\n
\/\/ \u4e0d\u4f7f\u7528 noop<\/span>\nfunction<\/span> a<\/span>(<\/span>value<\/span>,<\/span> callback<\/span>)<\/span>{<\/span>\n    \/\/ \u6bcf\u6b21\u4f7f\u7528 callback \u90fd\u8981\u5224\u65ad\u4e00\u6b21<\/span>\n    _<\/span>.<\/span>isFunction<\/span>(<\/span>callback<\/span>)<\/span> &&<\/span> callback<\/span>(<\/span>)<\/span>\n}<\/span>\n\n\/\/ \u4f7f\u7528 noop<\/span>\nfunction<\/span> a<\/span>(<\/span>value<\/span>,<\/span> callback<\/span>)<\/span> {<\/span>\n    \/\/ \u5224\u65ad\u4e00\u6b21<\/span>\n    if<\/span>(<\/span>!<\/span>_<\/span>.<\/span>isFunction<\/span>(<\/span>callback<\/span>)<\/span>)<\/span> callback<\/span> =<\/span> _<\/span>.<\/span>noop<\/span>;<\/span>\n\n    \/\/ \u4ee5\u540e\u90fd\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528<\/span>\n    callback<\/span>(<\/span>)<\/span>\n}<\/span><\/pre>\n<\/div>\n
deepGet<\/h2>\n
<\/p>\n
var<\/span> deepGet<\/span> =<\/span> function<\/span>(<\/span>obj<\/span>,<\/span> path<\/span>)<\/span> {<\/span>\n    var<\/span> length<\/span> =<\/span> path<\/span>.<\/span>length<\/span>;<\/span>\n    for<\/span> (<\/span>var<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> length<\/span>;<\/span> i<\/span>++<\/span>)<\/span> {<\/span>\n        if<\/span> (<\/span>obj<\/span> ==<\/span> null<\/span>)<\/span> return<\/span> void<\/span> 0<\/span>;<\/span>\n        obj<\/span> =<\/span> obj<\/span>[<\/span>path<\/span>[<\/span>i<\/span>]<\/span>]<\/span>;<\/span>\n    }<\/span>\n    return<\/span> length<\/span> ? obj<\/span> : void<\/span> 0<\/span>;<\/span>\n}<\/span>;<\/span><\/pre>\n<\/div>\n
deepGet \u7528\u4e8e\u83b7\u5f97\u5bf9\u8c61\u6df1\u5c42\u6b21\u7684\u503c\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
<\/p>\n
var<\/span> obj<\/span> =<\/span> {<\/span> \n    value<\/span>: {<\/span> \n        deepValue<\/span>: 2<\/span>\n    }<\/span> \n}<\/span>\n\nconsole<\/span>.<\/span>log<\/span>(<\/span>deepGet<\/span>(<\/span>obj<\/span>,<\/span> [<\/span>'value'<\/span>,<\/span> 'deepValue'<\/span>]<\/span>)<\/span>)<\/span><\/pre>\n<\/div>\n
\u4f7f\u7528\u8fd9\u4e2a\u51fd\u6570\uff0c\u53ef\u4ee5\u907f\u514d\u6df1\u5c42\u6b21\u53d6\u503c\u65f6\uff0c\u56e0\u4e3a\u6ca1\u6709\u5176\u4e2d\u7684\u4e00\u4e2a\u5c5e\u6027\uff0c\u5bfc\u81f4\u7684\u62a5\u9519\u3002<\/p>\n
shallowProperty<\/h2>\n
<\/p>\n
var<\/span> shallowProperty<\/span> =<\/span> function<\/span>(<\/span>key<\/span>)<\/span> {<\/span>\n    return<\/span> function<\/span>(<\/span>obj<\/span>)<\/span> {<\/span>\n      return<\/span> obj<\/span> ==<\/span> null<\/span> ? void<\/span> 0<\/span> : obj<\/span>[<\/span>key<\/span>]<\/span>;<\/span>\n    }<\/span>;<\/span>\n}<\/span>;<\/span><\/pre>\n<\/div>\n
shallowProperty \u4e5f\u662f\u7528\u4e8e\u83b7\u53d6\u5bf9\u8c61\u7684\u5c5e\u6027\uff0c\u4e5f\u8bb8\u4f60\u4f1a\u597d\u5947\u5728\u5f00\u53d1\u4e2d\uff0c\u76f4\u63a5\u4f7f\u7528.<\/code> \u4e0d\u5c31\u53ef\u4ee5\u83b7\u53d6\u5bf9\u8c61\u7684\u5c5e\u6027\u4e86\uff0c\u4e3a\u4ec0\u4e48\u8fd8\u8981\u5199\u6210\u8fd9\u6837\u5462\uff1f\u6211\u4eec\u6765\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
<\/p>\n
\/\/ \u83b7\u53d6 arr \u6240\u6709\u5143\u7d20\u7684 name \u5c5e\u6027<\/span>\nvar<\/span> arr<\/span> =<\/span> [<\/span>\n    {<\/span>\n        value<\/span>: 1<\/span>,<\/span>\n        name<\/span>: 'Kevin'<\/span>\n    }<\/span>,<\/span>\n    {<\/span>\n        value<\/span>: 2<\/span>,<\/span>\n        name<\/span>: 'Daisy'<\/span>\n    }<\/span>\n]<\/span>\n\n\/\/ \u666e\u901a\u65b9\u5f0f<\/span>\nvar<\/span> names<\/span> =<\/span> arr<\/span>.<\/span>map<\/span>(<\/span>function<\/span>(<\/span>item<\/span>)<\/span>{<\/span>\n    return<\/span> item<\/span>.<\/span>name<\/span>;<\/span>\n}<\/span>)<\/span>\n\n\/\/ \u4f7f\u7528 shallowProperty<\/span>\nvar<\/span> names<\/span> =<\/span> arr<\/span>.<\/span>map<\/span>(<\/span>shallowProperty<\/span>(<\/span>'name'<\/span>)<\/span>)<\/span><\/pre>\n<\/div>\n
_.property<\/h2>\n
<\/p>\n
_<\/span>.<\/span>property<\/span> =<\/span> function<\/span>(<\/span>path<\/span>)<\/span> {<\/span>\n    if<\/span> (<\/span>!<\/span>_<\/span>.<\/span>isArray<\/span>(<\/span>path<\/span>)<\/span>)<\/span> {<\/span>\n      return<\/span> shallowProperty<\/span>(<\/span>path<\/span>)<\/span>;<\/span>\n    }<\/span>\n    return<\/span> function<\/span>(<\/span>obj<\/span>)<\/span> {<\/span>\n      return<\/span> deepGet<\/span>(<\/span>obj<\/span>,<\/span> path<\/span>)<\/span>;<\/span>\n    }<\/span>;<\/span>\n}<\/span>;<\/span><\/pre>\n<\/div>\n
_.property<\/code> \u7ed3\u5408\u4e86 deepGet \u548c shallowProperty\uff0c\u53ef\u4ee5\u83b7\u53d6\u5143\u7d20\u6df1\u5c42\u6b21\u7684\u503c\u3002\u4e0a\u9762\u4e00\u4e2a\u4f8b\u5b50\u4e5f\u53ef\u4ee5\u5199\u6210\uff1a<\/p>\n
\n
var<\/span> names<\/span> =<\/span> arr<\/span>.<\/span>map<\/span>(<\/span>_<\/span>.<\/span>property<\/span>(<\/span>'name'<\/span>)<\/span>)<\/span><\/pre>\n<\/div>\n
_.propertyOf<\/h2>\n
<\/p>\n
_<\/span>.<\/span>propertyOf<\/span> =<\/span> function<\/span>(<\/span>obj<\/span>)<\/span> {<\/span>\n    if<\/span> (<\/span>obj<\/span> ==<\/span> null<\/span>)<\/span> {<\/span>\n        return<\/span> function<\/span>(<\/span>)<\/span>{<\/span>}<\/span>;<\/span>\n    }<\/span>\n    return<\/span> function<\/span>(<\/span>path<\/span>)<\/span> {<\/span>\n        return<\/span> !<\/span>Array<\/span>.<\/span>isArray<\/span>(<\/span>path<\/span>)<\/span> ? obj<\/span>[<\/span>path<\/span>]<\/span> : deepGet<\/span>(<\/span>obj<\/span>,<\/span> path<\/span>)<\/span>;<\/span>\n    }<\/span>;<\/span>\n}<\/span>;<\/span><\/pre>\n<\/div>\n
_.property<\/code> \u8fd4\u56de\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u8fd4\u56de\u4efb\u4f55\u4f20\u5165\u7684\u5bf9\u8c61\u7684\u6307\u5b9a\u5c5e\u6027\u3002<\/p>\n
_.propertyOf<\/code> \u4e0e _.property<\/code> \u76f8\u53cd\u3002\u9700\u8981\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u5c06\u8fd4\u56de\u4e00\u4e2a\u63d0\u4f9b\u7684\u5c5e\u6027\u7684\u503c\u3002<\/p>\n
\u6211\u4eec\u5199\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
<\/p>\n
\/\/ \u83b7\u53d6 person \u5bf9\u8c61\u7684\u6240\u6709\u5c5e\u6027\u503c<\/span>\nvar<\/span> person<\/span> =<\/span> {<\/span>\n    name<\/span>: 'Kevin'<\/span>,<\/span>\n    age<\/span>: '18'<\/span>\n}<\/span>;<\/span>\n\n\/\/ \u666e\u901a\u65b9\u5f0f<\/span>\nvar<\/span> values<\/span> =<\/span> Object<\/span>.<\/span>keys<\/span>(<\/span>person<\/span>)<\/span>.<\/span>map<\/span>(<\/span>(<\/span>key<\/span>)<\/span> =><\/span> person<\/span>[<\/span>key<\/span>]<\/span>)<\/span>;<\/span> \/\/ [\"Kevin\", \"18\"]<\/span>\n\n\/\/ \u4f7f\u7528 _.propertyOf<\/span>\nvar<\/span> values<\/span> =<\/span> Object<\/span>.<\/span>keys<\/span>(<\/span>person<\/span>)<\/span>.<\/span>map<\/span>(<\/span>_<\/span>.<\/span>propertyOf<\/span>(<\/span>person<\/span>)<\/span>)<\/span>;<\/span> \/\/ [\"Kevin\", \"18\"<\/span><\/pre>\n<\/div>\n
_.random<\/h2>\n
\u8fd4\u56de\u4e00\u4e2a min \u548c max \u4e4b\u95f4\u7684\u968f\u673a\u6574\u6570\u3002\u5982\u679c\u4f60\u53ea\u4f20\u9012\u4e00\u4e2a\u53c2\u6570\uff0c\u90a3\u4e48\u5c06\u8fd4\u56de 0 \u548c\u8fd9\u4e2a\u53c2\u6570\u4e4b\u95f4\u7684\u6574\u6570\u3002<\/p>\n
<\/p>\n
_<\/span>.<\/span>random<\/span> =<\/span> function<\/span>(<\/span>min<\/span>,<\/span> max<\/span>)<\/span> {<\/span>\n    if<\/span> (<\/span>max<\/span> ==<\/span> null<\/span>)<\/span> {<\/span>\n      max<\/span> =<\/span> min<\/span>;<\/span>\n      min<\/span> =<\/span> 0<\/span>;<\/span>\n    }<\/span>\n    return<\/span> min<\/span> +<\/span> Math<\/span>.<\/span>floor<\/span>(<\/span>Math<\/span>.<\/span>random<\/span>(<\/span>)<\/span> *<\/span> (<\/span>max<\/span> -<\/span> min<\/span> +<\/span> 1<\/span>)<\/span>)<\/span>;<\/span>\n  }<\/span>;<\/span><\/pre>\n<\/div>\n
\u6ce8\u610f\uff1a\u8be5\u968f\u673a\u503c\u6709\u53ef\u80fd\u662f min \u6216 max\u3002<\/p>\n
underscore \u7cfb\u5217<\/h2>\n
underscore \u7cfb\u5217\u76ee\u5f55\u5730\u5740\uff1ahttps:\/\/github.com\/mqyqingfeng\/Blog<\/a>\u3002<\/p>\n
underscore \u7cfb\u5217\u9884\u8ba1\u5199\u516b\u7bc7\u5de6\u53f3\uff0c\u91cd\u70b9\u4ecb\u7ecd underscore \u4e2d\u7684\u4ee3\u7801\u67b6\u6784\u3001\u94fe\u5f0f\u8c03\u7528\u3001\u5185\u90e8\u51fd\u6570\u3001\u6a21\u677f\u5f15\u64ce\u7b49\u5185\u5bb9\uff0c\u65e8\u5728\u5e2e\u52a9\u5927\u5bb6\u9605\u8bfb\u6e90\u7801\uff0c\u4ee5\u53ca\u5199\u51fa\u81ea\u5df1\u7684 undercore\u3002<\/p>\n<\/td>\n
\u6587\u7ae0\u8f6c\u8f7d\u81eahttps:\/\/github.com\/mqyqingfeng\/Blog\/issues\/62<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u9632\u51b2\u7a81 underscore \u4f7f\u7528 _ \u4f5c\u4e3a\u51fd\u6570\u7684\u6302\u8f7d\u5bf9\u8c61\uff0c\u5982\u679c\u9875\u9762\u4e2d\u5df2\u7ecf\u5b58\u5728\u4e86 _ \u5bf9\u8c61\uff0cunderscore \u5c31\u4f1a\u8986\u76d6\u8be5\u5bf9\u8c61\uff0c\u4e3e\u4e2a\u4f8b\u5b50\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-1367","post","type-post","status-publish","format-standard","hentry","category-learn"],"_links":{"self":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1367"}],"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=1367"}],"version-history":[{"count":1,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1367\/revisions"}],"predecessor-version":[{"id":1474,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1367\/revisions\/1474"}],"wp:attachment":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1367"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}