Node.js, MongoDB, and AngularJS Web Development

Working with Arrays

The Array object provides a means of storing and handling a set of other objects. Arrays can store numbers, strings, or other JavaScript objects. There are a couple different ways to create JavaScript arrays. For example, the following statements create three identical versions of the same array:

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var arr = ["one", "two", "three"];var arr2 = new Array();arr2[0] = "one";arr2[1] = "two";arr3[2] = "three";var arr3 = new Array();arr3.push("one");arr3.push("two");arr3.push("three");

The first method defines arr and sets the contents in a single statement, using []. The second method creates the arr2 object and then adds items to it, using direct index assignment. The third method creates the arr3