function Map() { this.elements = new Array(); this.size = function() { return this.elements.length; }, this.isEmpty = function() { return (this.elements.length < 1); }, this.clear = function() { this.elements = new Array(); }, this.put = function(_key, _value) { if (this.containsKey(_key) == true) { if (this.containsValue(_value)) { if (this.remove(_key) == true) { this.elements.push({ key : _key, value : _value }); } } else { this.elements.push({ key : _key, value : _value }); } } else { this.elements.push({ key : _key, value : _value }); } }, this.set = function(_key, _value) { if (this.containsKey(_key) == true) { if (this.containsValue(_value)) { if (this.remove(_key) == true) { this.elements.push({ key : _key, value : _value }); } } else { this.elements.push({ key : _key, value : _value }); } } else { this.elements.push({ key : _key, value : _value }); } }, this.remove = function(_key) { var bln = false; try { for (i = 0; i < this.elements.length; i++) { if (this.elements[i].key == _key) { this.elements.splice(i, 1); return true; } } } catch (e) { bln = false; } return bln; }, this.delete = function(_key) { var bln = false; try { for (i = 0; i < this.elements.length; i++) { if (this.elements[i].key == _key) { this.elements.splice(i, 1); return true; } } } catch (e) { bln = false; } return bln; }, this.get = function(_key) { try { for (i = 0; i < this.elements.length; i++) { if (this.elements[i].key == _key) { return this.elements[i].value; } } } catch (e) { return null; } }, this.setValue = function(_key, _value) { var bln = false; try { for (i = 0; i < this.elements.length; i++) { if (this.elements[i].key == _key) { this.elements[i].value = _value; return true; } } } catch (e) { bln = false; } return bln; }, this.element = function(_index) { if (_index < 0 || _index >= this.elements.length) { return null; } return this.elements[_index]; }, this.containsKey = function(_key) { var bln = false; try { for (i = 0; i < this.elements.length; i++) { if (this.elements[i].key == _key) { bln = true; } } } catch (e) { bln = false; } return bln; }, this.has = function(_key) { var bln = false; try { for (i = 0; i < this.elements.length; i++) { if (this.elements[i].key == _key) { bln = true; } } } catch (e) { bln = false; } return bln; }, this.containsValue = function(_value) { var bln = false; try { for (i = 0; i < this.elements.length; i++) { if (this.elements[i].value == _value) { bln = true; } } } catch (e) { bln = false; } return bln; }, this.keys = function() { var arr = new Array(); for (i = 0; i < this.elements.length; i++) { arr.push(this.elements[i].key); } return arr; }, this.values = function() { var arr = new Array(); for (i = 0; i < this.elements.length; i++) { arr.push(this.elements[i].value); } return arr; }; this.forEach = function forEach(callback,context){ context = context || window; var newAry = new Array(); for(var i = 0; i < this.elements.length;i++) { if(typeof callback === 'function') { var val = callback.call(context,this.elements[i].value,this.elements[i].key,this.elements); newAry.push(this.elements[i].value); } } return newAry; }}
转载于:https://www.cnblogs.com/lizhang4/p/11282620.html
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