JavaScript 模擬 Dictionary
阿新 • • 發佈:2018-10-19
set script per clas ear asc delet value clear
function Dictionary() { var items = {}; //判斷是否包含Key值 this.has = function(key) { return key in items; }; //賦值,添加鍵值對 this.set = function(key, value) { items[key] = value; }; //移除Key值 this.remove = function(key) { if (this.has(key)) { delete items[key]; return true; } return false; }; //通過Key值獲取Value值 this.get = function(key) { return this.has(key) ? items[key] : undefined; }; //獲取所有的Key值 this.keys = function() { var keys = []; for (var k in items) { keys.push(k); } return keys; }; //獲取所有的Value值 this.values = function() { var values = []; for (var k in items) { if (this.has(k)) { values.push(items[k]); } } return values; }; //初始化鍵值對 this.clear = function() { items = {}; }; //獲取鍵值對的個數 this.size = function() { var count = 0; for (var prop in items) { if (items.hasOwnProperty(prop)) {++count; } } return count; }; //獲取所有的鍵值對 this.getItems = function() { return items; }; }
JavaScript 模擬 Dictionary