js simulates a simple example of List in C#_javascript skills

复制代码 代码如下:

/*
 * List 大小可变数组
 * version: 1.0
 */
function List() {
    this.list = new Array();
};

/**
* Add the specified element to the end of this list.
* @param object specified element
*/
List.prototype.add = function(object) {
    this.list[this.list.length] = object;
};

/**
* Add List to the end of this list.
* @param listObject a list
*/
List.prototype.addAll = function(listObject) {
    this.list = this.list.concat(listObject.list);
};

/**
* Returns the element at the specified position in this list.
* @param index specifies the position
* @return the element at this position
*/
List.prototype.get = function(index) {
    return this.list[index];
};

/**
* Remove the element at the specified position from this list.
* @param index specifies the position
* @return the element at this position
*/
List.prototype.removeIndex = function(index) {
    var object = this.list[index];
    this.list.splice(index, 1);   
    return object;
};

/**
* Remove the specified element from this list.
* @param object specified element
* @return element at this position
*/
List.prototype.remove = function(object) {
    var i = 0;
    for(; i < this.list.length; i ) {       
        if( this.list[i] === object) {
            break;
        }       
    }
    if(i >= this.list.length) {
        return null;
    } else {
        return this.removeIndex(i);
    }
};

/**
* Remove all elements from this list.
*/
List.prototype.clear = function() {
    this.list.splice(0, this.list.length);
};

/**
* Returns the number of elements in this list.
* @return the number of elements
*/
List.prototype.size = function() {
    return this.list.length;
};

/**
* Returns a list between start (inclusive) and end (exclusive) specified in the list.
* @param start starting position
* @param end ending position
* @return new list
*/
List.prototype.subList = function(start, end) {   
    var list = new List();
    list.list = this.list.slice(start, end);
    return list;
};

/**
* Returns true if the list contains no elements.
* @return true or false
*/
List.prototype.isEmpty = function() {
    return this.list.length == 0;
};