Using JavaScript to implement Java's List function (explanation with examples)_javascript skills

复制代码 代码如下:

/**
* js simulates List in java
*/

var list = new Array();

/**
* Add
* @param {Object} object
*/
function add(object) {
 list[list.length] = object;
}

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

/**
* Get the specified element in the list.
* @param object specified element
* @return element at this position
*/
function get(index) { 
    return list[index]; 
} 

/**
* Remove all elements from this list.
*/ 
function removeAll() { 
    list.splice(0, list.length); 
}

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

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