{"id":1376,"date":"2024-06-02T22:28:42","date_gmt":"2024-06-02T22:28:42","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%e5%a6%82%e4%bd%95%e6%b1%82%e6%95%b0%e7%bb%84%e7%9a%84%e6%9c%80%e5%a4%a7%e5%80%bc%e5%92%8c%e6%9c%80%e5%b0%8f%e5%80%bc","status":"publish","type":"post","link":"https:\/\/www.lccc.top\/?p=1376","title":{"rendered":"JavaScript\u4e13\u9898\u4e4b\u5982\u4f55\u6c42\u6570\u7ec4\u7684\u6700\u5927\u503c\u548c\u6700\u5c0f\u503c"},"content":{"rendered":"\n

\u524d\u8a00<\/h2>\n

\u53d6\u51fa\u6570\u7ec4\u4e2d\u7684\u6700\u5927\u503c\u6216\u8005\u6700\u5c0f\u503c\u662f\u5f00\u53d1\u4e2d\u5e38\u89c1\u7684\u9700\u6c42\uff0c\u4f46\u4f60\u80fd\u60f3\u51fa\u51e0\u79cd\u65b9\u6cd5\u6765\u5b9e\u73b0\u8fd9\u4e2a\u9700\u6c42\u5462\uff1f<\/p>\n

Math.max<\/h2>\n

JavaScript \u63d0\u4f9b\u4e86 Math.max \u51fd\u6570\u8fd4\u56de\u4e00\u7ec4\u6570\u4e2d\u7684\u6700\u5927\u503c\uff0c\u7528\u6cd5\u662f\uff1a<\/p>\n

\n
Math<\/span>.<\/span>max<\/span>(<\/span>[<\/span>value1<\/span>[<\/span>,<\/span>value2<\/span>,<\/span> ...]<\/span>]<\/span>)<\/span><\/pre>\n<\/div>\n
\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff1a<\/p>\n
    \n
  1. \u5982\u679c\u6709\u4efb\u4e00\u53c2\u6570\u4e0d\u80fd\u88ab\u8f6c\u6362\u4e3a\u6570\u503c\uff0c\u5219\u7ed3\u679c\u4e3a NaN\u3002<\/li>\n
  2. max \u662f Math \u7684\u9759\u6001\u65b9\u6cd5\uff0c\u6240\u4ee5\u5e94\u8be5\u50cf\u8fd9\u6837\u4f7f\u7528\uff1aMath.max()\uff0c\u800c\u4e0d\u662f\u4f5c\u4e3a Math \u5b9e\u4f8b\u7684\u65b9\u6cd5 (\u7b80\u5355\u7684\u6765\u8bf4\uff0c\u5c31\u662f\u4e0d\u4f7f\u7528 new )<\/li>\n
  3. \u5982\u679c\u6ca1\u6709\u53c2\u6570\uff0c\u5219\u7ed3\u679c\u4e3a -Infinity<\/code> (\u6ce8\u610f\u662f\u8d1f\u65e0\u7a77\u5927)<\/li>\n<\/ol>\n
    \u800c\u6211\u4eec\u9700\u8981\u5206\u6790\u7684\u662f\uff1a<\/p>\n
    1.\u5982\u679c\u4efb\u4e00\u53c2\u6570\u4e0d\u80fd\u88ab\u8f6c\u6362\u4e3a\u6570\u503c\uff0c\u8fd9\u5c31\u610f\u5473\u7740\u5982\u679c\u53c2\u6570\u53ef\u4ee5\u88ab\u8f6c\u6362\u6210\u6570\u5b57\uff0c\u5c31\u662f\u53ef\u4ee5\u8fdb\u884c\u6bd4\u8f83\u7684\uff0c\u6bd4\u5982\uff1a<\/p>\n
    <\/p>\n
    Math<\/span>.<\/span>max<\/span>(<\/span>true<\/span>,<\/span> 0<\/span>)<\/span> \/\/ 1<\/span>\nMath<\/span>.<\/span>max<\/span>(<\/span>true<\/span>,<\/span> '2'<\/span>,<\/span> null<\/span>)<\/span> \/\/ 2<\/span>\nMath<\/span>.<\/span>max<\/span>(<\/span>1<\/span>,<\/span> undefined<\/span>)<\/span> \/\/ NaN<\/span>\nMath<\/span>.<\/span>max<\/span>(<\/span>1<\/span>,<\/span> {<\/span>}<\/span>)<\/span> \/\/ NaN<\/span><\/pre>\n<\/div>\n
    2.\u5982\u679c\u6ca1\u6709\u53c2\u6570\uff0c\u5219\u7ed3\u679c\u4e3a -Infinity\uff0c\u5bf9\u5e94\u7684\uff0cMath.min \u51fd\u6570\uff0c\u5982\u679c\u6ca1\u6709\u53c2\u6570\uff0c\u5219\u7ed3\u679c\u4e3a Infinity\uff0c\u6240\u4ee5\uff1a<\/p>\n
    <\/p>\n
    var<\/span> min<\/span> =<\/span> Math<\/span>.<\/span>min<\/span>(<\/span>)<\/span>;<\/span>\nvar<\/span> max<\/span> =<\/span> Math<\/span>.<\/span>max<\/span>(<\/span>)<\/span>;<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>min<\/span> ><\/span> max<\/span>)<\/span>;<\/span><\/pre>\n<\/div>\n
    \u4e86\u89e3\u4e86 Math.max \u65b9\u6cd5\uff0c\u6211\u4eec\u4ee5\u6c42\u6570\u7ec4\u6700\u5927\u503c\u7684\u4e3a\u4f8b\uff0c\u601d\u8003\u6709\u54ea\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u4e2a\u9700\u6c42\u3002<\/p>\n
    \u539f\u59cb\u65b9\u6cd5<\/h2>\n
    \u6700\u6700\u539f\u59cb\u7684\u65b9\u6cd5\uff0c\u83ab\u8fc7\u4e8e\u5faa\u73af\u904d\u5386\u4e00\u904d\uff1a<\/p>\n
    <\/p>\n
    var<\/span> arr<\/span> =<\/span> [<\/span>6<\/span>,<\/span> 4<\/span>,<\/span> 1<\/span>,<\/span> 8<\/span>,<\/span> 2<\/span>,<\/span> 11<\/span>,<\/span> 23<\/span>]<\/span>;<\/span>\n\nvar<\/span> result<\/span> =<\/span> arr<\/span>[<\/span>0<\/span>]<\/span>;<\/span>\nfor<\/span> (<\/span>var<\/span> i<\/span> =<\/span> 1<\/span>;<\/span> i<\/span> <<\/span> arr<\/span>.<\/span>length<\/span>;<\/span> i<\/span>++<\/span>)<\/span> {<\/span>\n    result<\/span> =<\/span>  Math<\/span>.<\/span>max<\/span>(<\/span>result<\/span>,<\/span> arr<\/span>[<\/span>i<\/span>]<\/span>)<\/span>;<\/span>\n}<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>result<\/span>)<\/span>;<\/span><\/pre>\n<\/div>\n
    reduce<\/h2>\n
    \u65e2\u7136\u662f\u901a\u8fc7\u904d\u5386\u6570\u7ec4\u6c42\u51fa\u4e00\u4e2a\u6700\u7ec8\u503c\uff0c\u90a3\u4e48\u6211\u4eec\u5c31\u53ef\u4ee5\u4f7f\u7528 reduce \u65b9\u6cd5\uff1a<\/p>\n
    <\/p>\n
    var<\/span> arr<\/span> =<\/span> [<\/span>6<\/span>,<\/span> 4<\/span>,<\/span> 1<\/span>,<\/span> 8<\/span>,<\/span> 2<\/span>,<\/span> 11<\/span>,<\/span> 23<\/span>]<\/span>;<\/span>\n\nfunction<\/span> max<\/span>(<\/span>prev<\/span>,<\/span> next<\/span>)<\/span> {<\/span>\n    return<\/span> Math<\/span>.<\/span>max<\/span>(<\/span>prev<\/span>,<\/span> next<\/span>)<\/span>;<\/span>\n}<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>arr<\/span>.<\/span>reduce<\/span>(<\/span>max<\/span>)<\/span>)<\/span>;<\/span><\/pre>\n<\/div>\n
    \u6392\u5e8f<\/h2>\n
    \u5982\u679c\u6211\u4eec\u5148\u5bf9\u6570\u7ec4\u8fdb\u884c\u4e00\u6b21\u6392\u5e8f\uff0c\u90a3\u4e48\u6700\u5927\u503c\u5c31\u662f\u6700\u540e\u4e00\u4e2a\u503c\uff1a<\/p>\n
    <\/p>\n
    var<\/span> arr<\/span> =<\/span> [<\/span>6<\/span>,<\/span> 4<\/span>,<\/span> 1<\/span>,<\/span> 8<\/span>,<\/span> 2<\/span>,<\/span> 11<\/span>,<\/span> 23<\/span>]<\/span>;<\/span>\n\narr<\/span>.<\/span>sort<\/span>(<\/span>function<\/span>(<\/span>a<\/span>,<\/span>b<\/span>)<\/span>{<\/span>return<\/span> a<\/span> -<\/span> b<\/span>;<\/span>}<\/span>)<\/span>;<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>arr<\/span>[<\/span>arr<\/span>.<\/span>length<\/span> -<\/span> 1<\/span>]<\/span>)<\/span><\/pre>\n<\/div>\n
    eval<\/h2>\n
    Math.max \u652f\u6301\u4f20\u591a\u4e2a\u53c2\u6570\u6765\u8fdb\u884c\u6bd4\u8f83\uff0c\u90a3\u4e48\u6211\u4eec\u5982\u4f55\u5c06\u4e00\u4e2a\u6570\u7ec4\u8f6c\u6362\u6210\u53c2\u6570\u4f20\u8fdb Math.max \u51fd\u6570\u5462\uff1feval \u4fbf\u662f\u4e00\u79cd<\/p>\n
    <\/p>\n
    var<\/span> arr<\/span> =<\/span> [<\/span>6<\/span>,<\/span> 4<\/span>,<\/span> 1<\/span>,<\/span> 8<\/span>,<\/span> 2<\/span>,<\/span> 11<\/span>,<\/span> 23<\/span>]<\/span>;<\/span>\n\nvar<\/span> max<\/span> =<\/span> eval<\/span>(<\/span>\"Math.max(\"<\/span> +<\/span> arr<\/span> +<\/span> \")\"<\/span>)<\/span>;<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>max<\/span>)<\/span><\/pre>\n<\/div>\n
    apply<\/h2>\n
    \u4f7f\u7528 apply \u662f\u53e6\u4e00\u79cd\u3002<\/p>\n
    <\/p>\n
    var<\/span> arr<\/span> =<\/span> [<\/span>6<\/span>,<\/span> 4<\/span>,<\/span> 1<\/span>,<\/span> 8<\/span>,<\/span> 2<\/span>,<\/span> 11<\/span>,<\/span> 23<\/span>]<\/span>;<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>Math<\/span>.<\/span>max<\/span>.<\/span>apply<\/span>(<\/span>null<\/span>,<\/span> arr<\/span>)<\/span>)<\/span><\/pre>\n<\/div>\n
    ES6 …<\/h2>\n
    \u4f7f\u7528 ES6 \u7684\u6269\u5c55\u8fd0\u7b97\u7b26\uff1a<\/p>\n
    <\/p>\n
    var<\/span> arr<\/span> =<\/span> [<\/span>6<\/span>,<\/span> 4<\/span>,<\/span> 1<\/span>,<\/span> 8<\/span>,<\/span> 2<\/span>,<\/span> 11<\/span>,<\/span> 23<\/span>]<\/span>;<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>Math<\/span>.<\/span>max<\/span>(<\/span>...arr<\/span>)<\/span>)<\/span><\/pre>\n<\/div>\n
    \u6709\u66f4\u591a\u7684\u65b9\u6cd5\u6b22\u8fce\u7559\u8a00\u54c8~<\/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\/35<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
    \u524d\u8a00 \u53d6\u51fa\u6570\u7ec4\u4e2d\u7684\u6700\u5927\u503c\u6216\u8005\u6700\u5c0f\u503c\u662f\u5f00\u53d1\u4e2d\u5e38\u89c1\u7684\u9700\u6c42\uff0c\u4f46\u4f60\u80fd\u60f3\u51fa\u51e0\u79cd\u65b9\u6cd5\u6765\u5b9e\u73b0\u8fd9\u4e2a\u9700\u6c42\u5462\uff1f Math.max JavaScript \u63d0\u4f9b\u4e86 Math.max \u51fd…<\/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-1376","post","type-post","status-publish","format-standard","hentry","category-learn"],"_links":{"self":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1376"}],"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=1376"}],"version-history":[{"count":1,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1376\/revisions"}],"predecessor-version":[{"id":1465,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1376\/revisions\/1465"}],"wp:attachment":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}