javascript中的数组(Array)扩展

编程技术  /  houtizong 发布于 3年前   75

/****************　数组扩展 ********************/Array.prototype.add = function(item) {this.push(item);}Array.prototype.addRange = function(items) {var length = items.length;if (length != 0) {for (var index = 0; index < length; index++) {this.push(items[index]);}}}Array.prototype.clear = function() {if (this.length > 0) {this.splice(0, this.length);}}Array.prototype.isEmpty = function() {if (this.length == 0)return true;elsereturn false;}Array.prototype.clone = function() {var clonedArray = [];var length = this.length;for (var index = 0; index < length; index++) {clonedArray[index] = this[index];}return clonedArray;}Array.prototype.contains = function(item) {var index = this.indexOf(item);return (index >= 0);}Array.prototype.dequeue = function() {return this.shift();}Array.prototype.indexOf = function(item) {var length = this.length;if (length != 0) {for (var index = 0; index < length; index++) {if (this[index] == item) {return index;}}}return -1;}Array.prototype.insert = function(index, item) {this.splice(index, 0, item);}Array.prototype.joinstr = function(str) {var new_arr = new Array(this.length);for (var i = 0; i < this.length; i++) {new_arr[i] = this[i] + str}return new_arr;}Array.prototype.queue = function(item) {this.push(item);}Array.prototype.remove = function(item) {var index = this.indexOf(item);if (index >= 0) {this.splice(index, 1);}}Array.prototype.removeAt = function(index) {this.splice(index, 1);}