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本文实例讲述了JS字典Dictionary类定义与用法。分享给大家供大家参考,具体如下:
字典 Dictionary类
/*字典 Dictionary类*/ function Dictionary() { this.add = add; this.datastore = new Array(); this.find = find; this.remove = remove; this.showAll = showAll; this.count = count; this.clear = clear; } function add(key, value) { this.datastore[key] = value; } function find(key) { return this.datastore[key]; } function remove(key) { delete this.datastore[key]; } function showAll() { var str = ""; for(var key in this.datastore) { str += key + " -> " + this.datastore[key] + "; " } console.log(str); } function count() { /*var ss = Object.keys(this.datastore).length; console.log("ssss "+ss); return Object.keys(this.datastore).length;*/ /**/ var n = 0; for(var key in Object.keys(this.datastore)) { ++n; } console.log(n); return n; } function clear() { for(var key in this.datastore) { delete this.datastore[key]; } } var pbook = new Dictionary(); pbook.add("Mike", "723"); pbook.add("Jennifer", "987"); pbook.add("Jonathan", "666"); pbook.showAll();//Mike -> 723; Jennifer -> 987; Jonathan -> 666; pbook.count();//3 pbook.remove("Jennifer"); //pbook.clear(); pbook.showAll();//Mike -> 723; Jonathan -> 666; pbook.count();//2
这里使用在线HTML/CSS/JavaScript代码运行工具:http://tools.haodaima.com/code/HtmlJsRun测试上述代码,可得如下运行结果:
希望本文所述对大家JavaScript程序设计有所帮助。
以上就是JS字典Dictionary类定义与用法示例。不知觉的在玻璃窗上呵出你的名字,原来你一向在我心里。更多关于JS字典Dictionary类定义与用法示例请关注haodaima.com其它相关文章!