| var isES5 = (function(){ |
| "use strict"; |
| return this === undefined; |
| })(); |
| |
| if (isES5) { |
| module.exports = { |
| freeze: Object.freeze, |
| defineProperty: Object.defineProperty, |
| getDescriptor: Object.getOwnPropertyDescriptor, |
| keys: Object.keys, |
| names: Object.getOwnPropertyNames, |
| getPrototypeOf: Object.getPrototypeOf, |
| isArray: Array.isArray, |
| isES5: isES5, |
| propertyIsWritable: function(obj, prop) { |
| var descriptor = Object.getOwnPropertyDescriptor(obj, prop); |
| return !!(!descriptor || descriptor.writable || descriptor.set); |
| } |
| }; |
| } else { |
| var has = {}.hasOwnProperty; |
| var str = {}.toString; |
| var proto = {}.constructor.prototype; |
| |
| var ObjectKeys = function (o) { |
| var ret = []; |
| for (var key in o) { |
| if (has.call(o, key)) { |
| ret.push(key); |
| } |
| } |
| return ret; |
| }; |
| |
| var ObjectGetDescriptor = function(o, key) { |
| return {value: o[key]}; |
| }; |
| |
| var ObjectDefineProperty = function (o, key, desc) { |
| o[key] = desc.value; |
| return o; |
| }; |
| |
| var ObjectFreeze = function (obj) { |
| return obj; |
| }; |
| |
| var ObjectGetPrototypeOf = function (obj) { |
| try { |
| return Object(obj).constructor.prototype; |
| } |
| catch (e) { |
| return proto; |
| } |
| }; |
| |
| var ArrayIsArray = function (obj) { |
| try { |
| return str.call(obj) === "[object Array]"; |
| } |
| catch(e) { |
| return false; |
| } |
| }; |
| |
| module.exports = { |
| isArray: ArrayIsArray, |
| keys: ObjectKeys, |
| names: ObjectKeys, |
| defineProperty: ObjectDefineProperty, |
| getDescriptor: ObjectGetDescriptor, |
| freeze: ObjectFreeze, |
| getPrototypeOf: ObjectGetPrototypeOf, |
| isES5: isES5, |
| propertyIsWritable: function() { |
| return true; |
| } |
| }; |
| } |