Easy JavaScript Generic List Implementation

• Download GenericList.zip - 2.1 KB

Introduction

Generic collections in .NET, in combination with LINQ, are powerful tools for the C# or VB.NET developer; however, nothing like it comes with JavaScript. This code provides the beginnings of a JavaScript implementation for a Generic List. Fortunately, due to JavaScript's flexibility, this can be achieved with a relatively small amount of code. 

Using the code 

The following public functions with a description of each are currently supported:

• Add: Add an element to the end of the list.
• ElementAt: Get the element at a specific index in the list.
• Where: Return a copy of this List object with only the elements that meet the criteria.
• FirstOrDefault: Return the first object in the list that meets the 'query' criteria or null if
• Count: Return the number of elements in the list. 
• OrderBy: Order (ascending) the objects in the list by the given object property name.
• OrderByDescending: Order (descending) the objects in the list by the given object property
• Data: Set the list data using the passed in array. 

Example of using Car objects to fill the List:

function Car(make, model)
{
    this.make = make;
    this.model = model;
}

var myList = new List();
myList.Add(new Car("Honda", "CR-V"));
myList.Add(new Car("Nissan", "Sentra"));
myList.Add(new Car("Honda", "Civic"));

var selList = myList.Where("make == 'Honda'").OrderByDescending("model");

History

Version 1 uploaded on May 4, 2012.