{"id":232724,"date":"2020-12-29T01:40:22","date_gmt":"2020-12-28T17:40:22","guid":{"rendered":"http:\/\/4563.org\/?p=232724"},"modified":"2020-12-29T01:40:22","modified_gmt":"2020-12-28T17:40:22","slug":"%e5%85%b3%e4%ba%8e-js-%e9%97%ad%e5%8c%85%e7%9a%84%e8%81%94%e6%83%b3%ef%bc%8c%e4%b8%ba%e4%bb%80%e4%b9%88%e5%8c%bf%e5%90%8d%e5%87%bd%e6%95%b0%e5%86%85%e7%9a%84%e5%8f%98%e9%87%8f%e4%b8%8d%e8%83%bd","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=232724","title":{"rendered":"\u5173\u4e8e js \u95ed\u5305\u7684\u8054\u60f3\uff0c\u4e3a\u4ec0\u4e48\u533f\u540d\u51fd\u6570\u5185\u7684\u53d8\u91cf\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\u5462 \u5177\u4f53\u770b\u4ee3\u7801"},"content":{"rendered":"
\n
\n
\n

\u5173\u4e8e js \u95ed\u5305\u7684\u8054\u60f3\uff0c\u4e3a\u4ec0\u4e48\u533f\u540d\u51fd\u6570\u5185\u7684\u53d8\u91cf\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\u5462 \u5177\u4f53\u770b\u4ee3\u7801 <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : sodadev <\/span> <\/i> 2<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

var Counter = (function() { var privateCounter = 0; function changeBy(val) { privateCounter += val; } return { increment: function() { changeBy(1); }, decrement: function() { changeBy(-1); }, value: function() { return privateCounter; } } })();<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (45<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : cyrbuzz <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7c98\u8d34\u5728\u63a7\u5236\u53f0\u6ca1\u5565\u62a5\u9519\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sodadev <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5f88\u62b1\u6b49\u6211\u4e0d\u4f1a\u683c\u5f0f\u5316\u4ee3\u7801 = = \u5927\u5bb6\u5c06\u5c31\u770b\u4e00\u4e0b\u5427 \u8fd9\u4e2a\u662f MDN \u4e0a\u7684\u539f\u7248\u793a\u4f8b
    var Counter = (function() {
    var privateCounter = 0;
    function changeBy(val) {
    privateCounter += val;
    }
    return {
    increment: function() { changeBy(1); },
    decrement: function() { changeBy(-1); },
    value: function() { return privateCounter; }
    }
    })(); <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : des <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u8fd9\u95ee\u9898\u4e0d\u662f\u5f88\u602a\u5417\uff0c\u8bbe\u8ba1\u4e0a\u5c31\u662f\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\uff0c\u6240\u4ee5\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sodadev <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @cyrbuzz \u662f\u4e0d\u62a5\u9519 \u6211\u5728\u60f3\u4e3a\u4ec0\u4e48 console.log(Counter.privateCounter); \u8fd4\u56de\u503c\u4f1a\u662f undefined <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sodadev <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @des \u6211\u5c31\u662f\u8fd9\u4e2a\u610f\u601d\uff0c\u3002\u3002\u3002\u4e3a\u4ec0\u4e48\u8bbe\u8ba1\u6210\u4e0d\u80fd\u8bbf\u95ee\u3002\u3002\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ck65 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5148\u629b\u5f00\u95ed\u5305\u4e0d\u60f3\u3002<\/p>\n

    Counter \u662f\u4e00\u4e2a object\uff0c\u6240\u4ee5\u4f60\u80fd .privateCounter\uff0c\u8fd9\u5728\u8bed\u6cd5\u4e0a\u4e0d\u72af\u89c4\uff0c\u6240\u4ee5\u4e0d\u62a5\u9519\u3002<\/p>\n

    \u4f46 Counter \u91cc\u6ca1\u6709 privateCounter \u8fd9\u4e2a\u5c5e\u6027\uff0c\u6240\u4ee5\u8bfb\u5b83\u5c31\u662f undefined \u3002<\/p>\n

    \u518d\u56de\u6765\u770b\u4e3a\u4ec0\u4e48 Counter \u91cc\u6ca1\u6709 privateCounter \u8fd9\u4e2a\u5c5e\u6027\u5462\uff1f\u56e0\u4e3a\u8fd9\u4e2a\u5bf9\u8c61\u7684\u503c\u662f\u4e2a\u533f\u540d\u51fd\u6570\uff0c\u4ec5\u4ec5\u662f\u8fd9\u4e2a\u533f\u540d\u51fd\u6570\u91cc\u6709\u4e2a\u53d8\u91cf\u53eb privateCounter \u800c\u5df2\u3002<\/p>\n

    \u8fd9\u4e2a\u53d8\u91cf\u4e0d\u5c5e\u4e8e Counter\uff0c\u5b83\u88ab\u533f\u540d\u51fd\u6570\u5305\u5728\u4e00\u4e2a\u5c01\u95ed\u7684\u4f5c\u7528\u57df\u91cc\u4e86\u3002\u95ed\u5305\u4e8c\u5b57\u8bf4\u7684\u5c31\u662f\u8fd9\u4e2a\u4f5c\u7528\u57df\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sodadev <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ck65 \u8c22\u8c22\u6307\u6559\uff01 \u90a3\u6211\u518d\u63d0\u95ee\u4e00\u4e0b\uff0c \u56e0\u4e3a Counter \u8fd9\u4e2a\u5bf9\u8c61\u53ea\u6709\u4e00\u4e2a\u533f\u540d\u51fd\u6570\uff0c\u4f46\u56e0\u4e3a\u662f\u533f\u540d\u7684\u51fd\u6570 \uff0c\u6240\u4ee5\u6ca1\u6cd5\u7528 ”
    xx.xx ” \u8fd9\u79cd\u5f62\u5f0f\u8c03\u7528\u662f\u4e48 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ck65 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    1 \u3001JS \u91cc\u51fd\u6570\u672c\u8eab\u4e5f\u662f object\uff0c\u4e0d\u7ba1\u533f\u540d\u4e0d\u533f\u540d
    2 \u3001\u4e0d\u662f\u6ca1\u6cd5\u7528 xx.xx \uff0c\u76f8\u53cd\u53ef\u4ee5\uff0c\u5c31\u50cf\u4f60\u5bf9\u4efb\u610f\u4e00\u4e2a object \u53bb xx.xx \u4e00\u6837<\/p>\n

    \u611f\u89c9\u4f60\u7684\u57fa\u7840\u6982\u5ff5\u6709\u70b9\u4e0d\u719f\uff0c\u53ef\u4ee5\u9605\u8bfb\u4e00\u4e0b\u300a\u4f60\u4e0d\u77e5\u9053\u7684 JS \u300b\u51e0\u672c\u5c0f\u518c\u5b50\uff0c\u7279\u522b\u6613\u61c2\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : vision1900 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u907f\u5f00\u95ed\u5305\u4e0d\u8c08\uff0c\u8bf7\u95ee\u4f60\u80fd\u8fd9\u4e48\u641e\u5417\uff1a
    var privateCounter = 0;
    var Counter = {
    increment: function() { changeBy(1); },
    decrement: function() { changeBy(-1); },
    value: function() { return privateCounter; }
    }<\/p>\n

    \/\/ \u73b0\u5728\u4f60\u60f3 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : vision1900 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \/\/ \u73b0\u5728\u4f60\u60f3\u8bbf\u95ee Counter.privateCounter? Excuse Me? <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : shintendo <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u554a\u8fd9\uff0c\u867d\u7136\u51fd\u6570\u662f\u5bf9\u8c61\uff0c\u4f46\u4ece\u6765\u6ca1\u8bf4\u8fc7\u51fd\u6570\u91cc\u9762\u7684\u53d8\u91cf\u662f\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027\u5427\uff1f\u4f60\u4e3a\u4ec0\u4e48\u4f1a\u5f97\u51fa\u8fd9\u4e2a\u7ed3\u8bba <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sodadev <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ck65 \u8c22\u8c22\u6307\u6559\uff01\u5df2\u7ecf\u627e\u5230\u8d44\u6e90\u4e86\uff01 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sodadev <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vision1900 #9 \u6309\u7167\u6211\u76ee\u524d\u7684\u7406\u89e3\u6765\u8bf4\uff0c \u5e94\u8be5\u662f\u4e0d\u53ef\u4ee5\u7684\u3002\u3002
    \u6211\u7684\u7406\u89e3\u662f
    privateCounter \u548c Counter \u662f\u540c\u7ea7\u7684\uff08\u540c\u4e00\u4e2a\u4f5c\u7528\u57df\uff09
    \u6240\u4ee5\u4e0d\u53ef\u4ee5\u53bb\u8bfb\u53d6
    \u8bf7\u95ee\u8fd9\u6837\u7684\u7406\u89e3\u5bf9\u5417 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sodadev <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @shintendo \u8bf7\u95ee\uff01 \u90a3\u4e48\u8fd9\u6837\u8bf4\u7684\u8bdd\uff0c\u51fd\u6570\u7684\u91cc\u7684\uff08\u6307\u82b1\u62ec\u53f7\u91cc\u7684\uff09\u53d8\u91cf\u662f\u4e0d\u80fd\u88ab\u5916\u90e8\u8bbf\u95ee\u5230\u7684\u5bf9\u5417\uff0c\u4f46\u662f\uff0c\u51fd\u6570\u53ef\u4ee5\u4f7f\u7528\u5b83\u4e0a\u4e00\u7ea7\u4f5c\u7528\u57df\u7684\u53d8\u91cf\uff0c\u8fd9\u6837\u662f\u5bf9\u7684\u5417 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Kasumi20 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u627e\u4e00\u672c\u4e66\u770b\u770b\u5427…………………. <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : akira <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @shintendo \u6709\u6ca1\u90a3\u4e2a\u8bed\u8a00\u662f\u628a\u51fd\u6570\u5185\u53d8\u91cf\uff0c\u4f5c\u4e3a\u51fd\u6570\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027\u7684\u5462 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : johnkiller <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    Counter \u53ea\u662f\u4e00\u4e2a\u5bf9\u8c61\u800c\u5df2\uff0c\u53ea\u6709\u6700\u540e return \u7684\u4e09\u4e2a\u5c5e\u6027\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ljpCN <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u4e2a\u51fd\u6570\u4e0d\u662f Counter \u7684\u5185\u5bb9\uff0c\u8fd9\u4e2a\u51fd\u6570\u7684\u8fd4\u56de\u503c\u624d\u662f Counter \u7684\u5185\u5bb9\u3002\u3002\u51fd\u6570\u88ab\u7acb\u5373\u6267\u884c\u4e86\u3002\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : oott123 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u6ca1\u6709\u5199 Counter.privateCounter = xxx\uff0c\u90a3\u4e48\u4f60\u5c31\u8bbf\u95ee\u4e0d\u4e86 Counter.privateCounter\uff0c\u5c31\u8fd9\u4e48\u7b80\u5355\u3002
    \u81f3\u4e8e\u51fd\u6570\u91cc\u9762\u7684 var\uff0c\u90a3\u548c Counter \u65e0\u5173\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Zhuzhuchenyan <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6df7\u6dc6\u4e86\u592a\u591a\u6982\u5ff5\uff0c\u6211\u6765\u5c1d\u8bd5\u6307\u4e00\u6761\u660e\u8def\u5427
    1. \u7406\u89e3 Js \u4e2d\u5bf9\u8c61\u548c\u5c5e\u6027\u8bbf\u95ee\u5668\u7684\u6982\u5ff5\uff0c\u53c2\u8003\u9605\u8bfb
    https:\/\/developer.mozilla.org\/zh-CN\/docs\/Web\/JavaScript\/Reference\/Global_Objects\/Object
    https:\/\/developer.mozilla.org\/zh-CN\/docs\/Web\/JavaScript\/Reference\/Operators\/Property_Accessors<\/p>\n

    \u6b64\u5904\u91cd\u70b9\u662f\u8981\u7406\u89e3 JS \u4e2d\u4e00\u5207\u7686\u662f\u5bf9\u8c61\uff0c\u5e76\u4e14\u5bf9\u8c61\u4e2d\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u53ef\u4ee5\u88ab\u5c5e\u6027\u8bbf\u95ee\u5668\u8bbf\u95ee\u5230<\/p>\n

    2. \u7406\u89e3\u4ec0\u4e48\u662f\u95ed\u5305\uff0c\u53c2\u5f00\u9605\u8bfb
    https:\/\/developer.mozilla.org\/zh-CN\/docs\/Web\/JavaScript\/Closures
    \u6b64\u5904\u9700\u8981\u91cd\u70b9\u7406\u89e3\u8bcd\u6cd5\u4f5c\u7528\u57df\u7684\u6982\u5ff5\uff0c\u8fdb\u800c\u7406\u89e3\u95ed\u5305\u7684\u672c\u8d28\u5c31\u662f\u4f60\u6301\u6709\u7684\u7684\u67d0\u4e2a\u53ef\u4ee5\u88ab\u8c03\u7528\u7684\u51fd\u6570\u4f1a\u4fdd\u6301\u7740\u81ea\u5df1\u4f5c\u7528\u57df\u94fe\uff08\u53c8\u79f0\u8bcd\u6cd5\u73af\u5883\uff09\u7684\u5f15\u7528\u3002<\/p>\n

    3. \u7406\u89e3 IIFE\uff0c\u53c2\u8003\u9605\u8bfb
    https:\/\/developer.mozilla.org\/zh-CN\/docs\/Glossary\/\u7acb\u5373\u6267\u884c\u51fd\u6570\u8868\u8fbe\u5f0f<\/p>\n

    4. \u7406\u89e3 var\uff0c\u53c2\u8003\u9605\u8bfb
    https:\/\/developer.mozilla.org\/zh-CN\/docs\/Web\/JavaScript\/Reference\/Statements\/var<\/p>\n

    \u6b64\u5904\u91cd\u70b9\u5176\u5b9e\u662f\u8fd9\u53e5\u8bdd\uff0c\u201c\u7528 var \u58f0\u660e\u7684\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u662f\u5b83\u5f53\u524d\u7684\u6267\u884c\u4e0a\u4e0b\u6587\uff0c\u5b83\u53ef\u4ee5\u662f\u5d4c\u5957\u7684\u51fd\u6570\uff0c\u6216\u8005\u5bf9\u4e8e\u58f0\u660e\u5728\u4efb\u4f55\u51fd\u6570\u5916\u7684\u53d8\u91cf\u6765\u8bf4\u662f\u5168\u5c40\u3002\u201d<\/p>\n

    5. \u5728 1\uff0c2\uff0c3\uff0c4 \u7684\u57fa\u7840\u4e0a\u5c31\u53ef\u4ee5\u63a8\u5bfc\u51fa\uff0cprivateCounter \u53ea\u662f\u4e00\u4e2a\u5728\u533f\u540d\u51fd\u6570\u8bcd\u6cd5\u4f5c\u7528\u57df\u4e2d\u7684\u4e00\u4e2a\u53d8\u91cf\uff0c\u5e76\u4e14\u548c\u5bf9\u8c61\u6ca1\u6709\u4efb\u4f55\u5173\u7cfb<\/p>\n

    6. \u4f60\u53ef\u80fd\u8fd8\u4f1a\u4e00\u77e5\u534a\u89e3\uff0c\u5ef6\u4f38\u9605\u8bfb\u63a8\u8350\uff0cyou don’t know js\uff0c\u6709\u4e2d\u6587\u7248\uff0c\u5f00\u6e90\u5730\u5740\u4e3a
    https:\/\/github.com\/getify\/You-Dont-Know-JS\/tree\/2nd-ed\/scope-closures
    \u8fd9\u4e00\u7ae0\u5bf9\u8bcd\u6cd5\u4f5c\u7528\u57df\uff0c\u4f5c\u7528\u57df\u94fe\uff0c\u5168\u5c40\u4f5c\u7528\u57df\uff0c\u5bf9\u8c61\u751f\u547d\u5468\u671f\uff0c\u95ed\u5305\u6709\u8be6\u5b9e\u7684\u8bb2\u89e3<\/p>\n

    7. \u5343\u4e07\u522b\u548c this \u95ee\u9898\u6df7\u6dc6\uff0c\u90a3\u662f\u53e6\u4e00\u4e2a\u5927\u5751 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : iceheart <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    14 \u7684\u7406\u89e3\u6709\u70b9\u4e0a\u8def\u4e86\uff0c\u95ee\u9898\u5173\u952e\u70b9\u662f\u4e3b\u5bf9\u4f5c\u7528\u57df\u6982\u5ff5\u7406\u89e3\u4e0d\u591f\u3002
    \u591a\u6570\u60c5\u51b5\u53ef\u4ee5\u7406\u89e3\u4e3a\u82b1\u62ec\u53f7\u91cc\u8fb9\u7684\u53d8\u91cf \/\u4ee3\u7801\u4e0d\u80fd\u88ab\u5916\u90e8\u76f4\u63a5\u8bbf\u95ee\u3002\u5bf9\u8c61\u7b97\u662f\u6709\u70b9\u4f8b\u5916\u3002
    \u4f5c\u7528\u57df\u57fa\u672c\u662f\u53ef\u89c1\u6027\u7684\u53e6\u4e00\u79cd\u8bf4\u6cd5\u3002\u51fd\u6570\u4f5c\u7528\u57df\u3001\u6587\u4ef6\u4f5c\u7528\u57df\u3002\u5176\u4ed6\u8bed\u8a00\u91cc\u6709\u7c7b\u4f5c\u7528\u57df\uff0c\u5bf9\u5e94 js \u91cc\u7684\u5bf9\u8c61\u4f5c\u7528\u57df\u3002\u76f8\u5173\u5185\u5bb9\u4e0d\u591a\uff0c\u5173\u952e\u8bcd:\u4f5c\u7528\u57df\uff0c\u53ef\u89c1\u6027 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : beichenhpy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e0d\u592a\u61c2 js \u4f46\u6211\u611f\u89c9\u4f60\u53ef\u4ee5\u628a\u6709 privateCounter \u8fd9\u4e2a\u53d8\u91cf\u7684\u51fd\u6570\u62bd\u8c61\u51fa\u6765\uff0c\u90a3\u4e48\u8fd9\u6837\u5c31\u53ef\u4ee5\u770b\u51fa\u6765\u8fd9\u4e2a\u4ea7\u91cf\u662f\u5c40\u90e8\u7684\uff0c\u5916\u90e8\u6ca1\u6cd5\u8bbf\u95ee\u5230\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : kiwier <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5f04\u660e\u767d js \u4f5c\u7528\u57df\u4f60\u5c31\u604d\u7136\u5927\u609f\u4e86\uff0c\u51fd\u6570\u58f0\u660e\u540e\u5982\u679c\u6ca1\u6709\u6267\u884c\u662f\u65e0\u6cd5\u83b7\u77e5\u5176\u5185\u90e8\u7684\u533f\u540d\u51fd\u6570\u7684\u5185\u90e8\u7684\uff0c\u6700\u591a\u77e5\u9053\u5b58\u5728\u4e00\u4e2a\u6216\u8005\u591a\u4e2a\u533f\u540d\u51fd\u6570\uff0c\u4f46\u662f\u80af\u5b9a\u4e0d\u4f1a\u77e5\u9053\u81ea\u5df1\u5185\u90e8\u7684\u533f\u540d\u51fd\u6570\u91cc\u8fb9\u7684\u53d8\u91cf\u7684\uff0c\u5176\u5185\u90e8\u7684\u533f\u540d\u51fd\u6570\u5728\u88ab\u6267\u884c\u7684\u65f6\u5019\u4f1a\u751f\u6210\u81ea\u5df1\u7684 ao \u5bf9\u8c61\uff0c\u5916\u90e8\u51fd\u6570\u624d\u80fd\u901a\u8fc7\u533f\u540d\u51fd\u6570\u83b7\u53d6\u5230\u5185\u90e8\u53d8\u91cf <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : xiangyuecn <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    var Counter = (function() {
    \/\/var privateCounter = 0;
    function changeBy(val) {
    Counter.privateCounter = (Counter.privateCounter||0) +val;
    }
    return {
    increment: function() { changeBy(1); },
    decrement: function() { changeBy(-1); },
    value: function() { return Counter.privateCounter; }
    }
    })();<\/p>\n

    \u53d8\u91cf\u8c01\u8981\u5c31\u7ed9\u8c01\uff0c\u4e0d\u7136\u51fd\u6570\u91cc\u9762\u7684\u9664\u4e86\u81ea\u5df1\u80fd\u8bbf\u95ee\u8c01\u90fd\u8bbf\u95ee\u4e0d\u4e86\u3002\u7279\u4f8b\u662f\u5168\u5c40\u4e0b\u9762\u7684\uff0c\u88ab\u5212\u7ed9\u4e86 window \u5bf9\u8c61 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : hujun528 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @sodadev \u65b0\u624b\u5b66\u95ed\u5305\u5374\u5b9e\u6709\u70b9\u96be\u5543\uff0c\u5efa\u8bae\u57fa\u7840\u5b66\u900f\u3000 http:\/\/www.jianxue.mobi\/treep\/2500\/2775 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : dartabe <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5efa\u8bae\u628a javascript \u7684\u95ed\u5305\u4ece\u5934\u5f00\u59cb\u770b \u4e0d\u662f\u4ec0\u4e48\u4e09\u8a00\u4e24\u8bed\u8bf4\u7684\u6e05\u695a\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : kiwier <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @dartabe \u641e\u61c2\u4f5c\u7528\u57df\uff0c\u5f88\u5bb9\u6613\u7406\u89e3\u95ed\u5305 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : dartabe <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @kiwier \u6211\u77e5\u9053\u662f\u4f5c\u7528\u57df\u94fe\u7684\u95ee\u9898 \u4f46\u662f\u8fd8\u662f\u770b\u4e2a\u6765\u9f99\u53bb\u8109\u6bd4\u8f83\u5bb9\u6613\u61c2 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : kiwier <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @dartabe \u662f\u7684\uff0c\u4f5c\u7528\u57df\u8fde \u539f\u578b\u94fe \u5565\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : across <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u4e2a\u5c31\u662f\u57fa\u7840\u7684\u91cd\u8981\u6027\u4e86\u3002<\/p>\n

    \u5916\u90e8\u53d8\u91cf\u4e0d\u80fd\u8bbf\u95ee -> \u53d8\u91cf\u4f5c\u7528\u57df -> \u7f16\u8bd1\u5668\u7684\u5904\u7406\u65b9\u5f0f\uff08 OOP \u8bed\u8a00\u4f1a\u5c01\u88c5\u6210\u7c7b\u5bf9\u8c61\uff09 -> \u5e95\u5c42\u5806\u6808\u8bbf\u95ee\u63a7\u5236\u539f\u5219\u3002
    \u4f46\u662f\u8ba4\u771f\u770b\u770b js \u7684\u4e66\uff0c\u524d\u4e24\u4e2a\u4e5f\u4f1a\u660e\u786e\u544a\u8bc9\u4f60\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : px920906 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u53cd\u8fc7\u6765\u60f3\uff0c\u5982\u679c\u662f\u8fd9\u6837\u8bbe\u8ba1\u7684
    “`js
    function sayHello(name) {
    var hello = ‘Hello’
    console.log(hello + ‘ ‘ + name)
    }
    sayHello.hello = ‘Fxck you’
    sayHello(‘Jack’)
    “`
    \u5c31\u5b8c\u5168\u53ef\u4ee5\u5199\u6210
    “`js
    var hello = ‘Hello’
    function sayHello(name) {
    console.log(hello + ‘ ‘ + name)
    }
    hello = ‘Fxck you’
    sayHello(‘Jack’)
    “`
    \u95ed\u5305\u3001\u5c40\u90e8\u53d8\u91cf\u4e0d\u5c31\u6ca1\u4ec0\u4e48\u610f\u4e49\u4e86\u4e48\uff0c\u90fd\u7528\u5168\u5c40\u53d8\u91cf\u597d\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : FaiChou <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    http:\/\/www.yinwang.org\/blog-cn\/2012\/08\/01\/interpreter <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : v2lf <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    var \u662f\u58f0\u660e\u5c40\u90e8\u53d8\u91cf\u7684\uff0c\u5e76\u6dfb\u52a0\u5230\u6700\u8fd1\u7684\u4f5c\u7528\u57df\u5bf9\u8c61\uff08 js\uff0c\u6211\u8bb0\u5f97\u662f\u90fd\u662f\u51fd\u6570\u4f5c\u7528\u57df\u548c\u5168\u5c40\uff09
    .\u8fd0\u7b97\u7b26\u662f\u8bbf\u95ee\u5bf9\u8c61\u5c5e\u6027\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : v2lf <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5efa\u8bae\u770b\u4e0b js \u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : v2lf <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5efa\u8bae\u770b\u4e0b js \u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u3002
    @v2lf \u770b\u4e0b\u4f5c\u7528\u57df\u94fe\uff0c\u8fd8\u6709\u539f\u578b\u94fe <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : user8341 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u4e2a\u4f8b\u5b50\u5f88\u7ecf\u5178\u7684\u3002\u5c31\u662f\u7528\u95ed\u5305\u5b9e\u73b0\u5c01\u88c5\uff0c\u8ba9\u5916\u754c\u8bbf\u95ee\u4e0d\u5230 counter \u7684\u5b9e\u73b0\u7ec6\u8282\uff0c\u53ea\u80fd\u8bbf\u95ee\u5230\u5916\u90e8\u63a5\u53e3\u3002\u5b9e\u73b0\u7ec6\u8282\u5c31\u662f privateCounter \u662f\u533f\u540d\u51fd\u6570\u7684\u5185\u90e8\u53d8\u91cf\uff0c\u5916\u90e8\u63a5\u53e3\u662f\u533f\u540d\u51fd\u6570\u7684\u8fd4\u56de\u503c\u5305\u542b\u7684\u90a3\u4e09\u4e2a\u5185\u90e8\u51fd\u6570 inc \u3001dec \u3001val \u3002<\/p>\n

    counter \u662f\u4ec0\u4e48\uff1f\u662f\u533f\u540d\u51fd\u6570\u7684\u8fd4\u56de\u503c\uff0cCounter = (function() {…}) (); \u6ce8\u610f\u770b\uff0c\u5b83\u5b9a\u4e49\u4e86\u8fd9\u4e2a\u51fd\u6570\u5bf9\u8c61\uff0c\u7136\u540e\u7acb\u523b\u5c31\u8c03\u7528\u5b83\uff0c\u8fd4\u56de\u503c\u8d4b\u7ed9 Counter \u3002<\/p>\n

    \u6d89\u53ca\u5230\u95ed\u5305\u7684\u6982\u5ff5\uff0c\u4e09\u4e2a\u5185\u90e8\u51fd\u6570\u4e4b\u6240\u4ee5\u80fd\u8bbf\u95ee\u5230 var privateCounter \u662f\u56e0\u4e3a\u5b83\u5c5e\u4e8e\u4ed6\u4eec\u5b9a\u4e49\u65f6\u7684\u4e0a\u4e0b\u6587\u73af\u5883\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : user8341 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5728\u4e00\u4e9b\u8bed\u8a00\u6bd4\u5982 C++\u3001Java \u8981\u5b9e\u73b0\u5c01\u88c5\u5f88\u5bb9\u6613\uff0c\u53ea\u8981\u8bbf\u95ee\u63a7\u5236\u58f0\u660e\u6210 private \u5c31\u884c\u4e86\u3002\u4f46\u662f js \u5c31\u662f\u8981\u7ed5\u4e00\u70b9\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ck65 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u786e\u5b9e\u5982 #18 @ljpCN \u6240\u8bf4\uff0cCounter \u7684\u503c\u662f\u533f\u540d\u51fd\u6570\u8fd4\u56de\u7684\u5bf9\u8c61\u3002\u6211\u9a6c\u864e\u4e86\u3002\u4f46\u7adf\u7136\u4e5f\u6b6a\u6253\u6b63\u7740\u3002\u3002\u603b\u4e4b\u6700\u7ec8\u8d4b\u7ed9 Counter \u7684\u503c\uff0c\u4e5f\u5c31\u662f return \u7684\u90a3\u4e2a\u5bf9\u8c61\u91cc\u9762\u6ca1\u6709 privateCounter \u8fd9\u4e2a key\uff0c\u8bbf\u95ee\u4e00\u4e2a\u5bf9\u8c61\u91cc\u4e0d\u5b58\u5728\u7684 key \u5c31\u5f97\u5230 undefined \u3002\u539f\u56e0\u662f\u4f5c\u7528\u57df\u5c01\u95ed\uff08 closure \uff09\u8fd9\u4e00\u601d\u8def\u8fd8\u662f\u6709\u6548\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : meepo3927 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u56e0\u4e3a\u66b4\u9732\u63a5\u53e3\u66f4\u597d\uff0c\u5bf9\u6bd4\u76f4\u63a5\u66b4\u9732\u6210\u5458\u53d8\u91cf\uff0c\u53ef\u4ee5\u5c06\u4ee3\u7801\u4fee\u6539\u5bf9\u5916\u90e8\u8c03\u7528\u7684\u5f71\u54cd\u964d\u5230\u6700\u4f4e\u3002<\/p>\n

    \u5047\u5982\u6709\u4e00\u5929\uff0c\u56e0\u4e3a\u4e00\u4e9b\u539f\u56e0\uff0c\u4f60\u8981\u6539\u6210\u5458\u53d8\u91cf\uff08 privateCounter \uff09\u7684\u540d\u5b57\uff0c\u5982\u679c\u6ca1\u6709 value \u63a5\u53e3\u7684\u8bdd\uff0c\u5916\u90e8\u8c03\u7528\u8005\u5c82\u4e0d\u662f\u90fd\u8981\u6539\u3002<\/p>\n

    \u6709\u4e86 value \u63a5\u53e3\uff0c\u4f60\u5c31\u968f\u4fbf\u6539\u4e86\uff0c\u751a\u81f3\u53ef\u4ee5\u5728 value \u63a5\u53e3\u4e2d\u5199\u5f88\u591a\u903b\u8f91\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : no1xsyzy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u90a3\u4e48\uff0c\u4e3a\u4e86\u5e2e\u52a9\u4e3b\u4e4b\u7c7b\u7684\u65b0\u624b\uff0c\u662f\u5426\u5b58\u5728\u53ef\u4ee5\u67e5\u770b js \u53d8\u91cf\u4f5c\u7528\u57df\u7684\uff08 IDE \u63d2\u4ef6|\u72ec\u7acb\u6f14\u793a\u7528\u5de5\u5177\uff09\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : 0x11901 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8bf4\u53e5\u9898\u5916\u8bdd\uff0c\u533f\u540d\u51fd\u6570\u548c\u95ed\u5305\u672c\u8eab\u5c31\u4e0d\u662f\u540c\u4e00\u4e2a\u6982\u5ff5 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ck65 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
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    \u8cc7\u6df1\u5927\u4f6c : cczeng <\/span> <\/div>\n
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    \u4f5c\u7528\u57df\u3001\u6267\u884c\u4e0a\u4e0b\u6587 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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