twitst4tz

twitter statistics web application
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es5.js (1978B)

      1 var isES5 = (function(){
      2     "use strict";
      3     return this === undefined;
      4 })();
      5 
      6 if (isES5) {
      7     module.exports = {
      8         freeze: Object.freeze,
      9         defineProperty: Object.defineProperty,
     10         getDescriptor: Object.getOwnPropertyDescriptor,
     11         keys: Object.keys,
     12         names: Object.getOwnPropertyNames,
     13         getPrototypeOf: Object.getPrototypeOf,
     14         isArray: Array.isArray,
     15         isES5: isES5,
     16         propertyIsWritable: function(obj, prop) {
     17             var descriptor = Object.getOwnPropertyDescriptor(obj, prop);
     18             return !!(!descriptor || descriptor.writable || descriptor.set);
     19         }
     20     };
     21 } else {
     22     var has = {}.hasOwnProperty;
     23     var str = {}.toString;
     24     var proto = {}.constructor.prototype;
     25 
     26     var ObjectKeys = function (o) {
     27         var ret = [];
     28         for (var key in o) {
     29             if (has.call(o, key)) {
     30                 ret.push(key);
     31             }
     32         }
     33         return ret;
     34     };
     35 
     36     var ObjectGetDescriptor = function(o, key) {
     37         return {value: o[key]};
     38     };
     39 
     40     var ObjectDefineProperty = function (o, key, desc) {
     41         o[key] = desc.value;
     42         return o;
     43     };
     44 
     45     var ObjectFreeze = function (obj) {
     46         return obj;
     47     };
     48 
     49     var ObjectGetPrototypeOf = function (obj) {
     50         try {
     51             return Object(obj).constructor.prototype;
     52         }
     53         catch (e) {
     54             return proto;
     55         }
     56     };
     57 
     58     var ArrayIsArray = function (obj) {
     59         try {
     60             return str.call(obj) === "[object Array]";
     61         }
     62         catch(e) {
     63             return false;
     64         }
     65     };
     66 
     67     module.exports = {
     68         isArray: ArrayIsArray,
     69         keys: ObjectKeys,
     70         names: ObjectKeys,
     71         defineProperty: ObjectDefineProperty,
     72         getDescriptor: ObjectGetDescriptor,
     73         freeze: ObjectFreeze,
     74         getPrototypeOf: ObjectGetPrototypeOf,
     75         isES5: isES5,
     76         propertyIsWritable: function() {
     77             return true;
     78         }
     79     };
     80 }