class Map constructor : -> @entry = {} @count = 0 size : -> return @count isEmpty : -> return @count == 0 containsKey : (key) -> if @isEmpty() return false return @entry.hasOwnProperty key containsValue : (val)-> if @isEmpty() return false for key,_val of @entry if _val == val return true return false get : (key)-> if @isEmpty() return null if @containsKey key return @entry[key] return null put : (key, val)-> if !@entry.hasOwnProperty key @count += 1; @entry[key] = val return @ remove : (key)-> if @isEmpty() return false if @containsKey key delete @entry[key] @count -= 1 return true return false putAll : (map)-> if !map instanceof Map return false entry = map.entry for key,val of entry @put(key, val) return true clear : -> @entry = {} @count = 0 return @ values : -> vals = [] for key,val of @entry vals.push val return vals keySet : -> keys = [] for key,val of @entry keys.push key return keys entrySet : -> return @entry toString : -> if typeof JSON == "undefined" throw new Error "JSON object is not supported. Please check your browser version (IE8+, Firefox11+, Chrome19+, Safari5.1+)." return JSON.stringify @entry valueOf : -> return @toString()
使用coffeescript编译后生成代码：
(function() { var Map; var __hasProp = Object.prototype.hasOwnProperty; Map = function() { this.entry = {}; this.count = 0; return this; }; Map.prototype.size = function() { return this.count; }; Map.prototype.isEmpty = function() { return this.count === 0; }; Map.prototype.containsKey = function(key) { if (this.isEmpty()) { return false; } return this.entry.hasOwnProperty(key); }; Map.prototype.containsValue = function(val) { var _a, _val, key; if (this.isEmpty()) { return false; } _a = this.entry; for (key in _a) { if (!__hasProp.call(_a, key)) continue; _val = _a[key]; if (_val === val) { return true; } } return false; }; Map.prototype.get = function(key) { if (this.isEmpty()) { return null; } if (this.containsKey(key)) { return this.entry[key]; } return null; }; Map.prototype.put = function(key, val) { if (!this.entry.hasOwnProperty(key)) { this.count += 1; }; this.entry[key] = val; return this; }; Map.prototype.remove = function(key) { if (this.isEmpty()) { return false; } if (this.containsKey(key)) { delete this.entry[key]; this.count -= 1; return true; } return false; }; Map.prototype.putAll = function(map) { var _a, entry, key, val; if (!map instanceof Map) { return false; } entry = map.entry; _a = entry; for (key in _a) { if (!__hasProp.call(_a, key)) continue; val = _a[key]; this.put(key, val); } return true; }; Map.prototype.clear = function() { this.entry = {}; this.count = 0; return this; }; Map.prototype.values = function() { var _a, key, val, vals; vals = []; _a = this.entry; for (key in _a) { if (!__hasProp.call(_a, key)) continue; val = _a[key]; vals.push(val); } return vals; }; Map.prototype.keySet = function() { var _a, key, keys, val; keys = []; _a = this.entry; for (key in _a) { if (!__hasProp.call(_a, key)) continue; val = _a[key]; keys.push(key); } return keys; }; Map.prototype.entrySet = function() { return this.entry; }; Map.prototype.toString = function() { if (typeof JSON === "undefined") { throw new Error("JSON object is not supported. Please check your browser version (IE8+, Firefox11+, Chrome19+, Safari5.1+)."); } return JSON.stringify(this.entry); }; Map.prototype.valueOf = function() { return this.toString(); }; })();