Code review for a collection manipulation tool in Javascript

As I was working with .NET, I started wondering how I would implement the LINQ methods syntax in Javascript. So here is my first try; is there a more elegant, or more performant, way to write this code?

// usage : the functions take a predicate function as input and modify the array accordingly 
var collection;
(function() {
    "use strict";

    var Collections = function(array) {
        this.array = array;
    };

    Collections.prototype = {
        //The predicate should return a boolean value
        //Keeps all elements that match the given function
        where: function(predicate) {
            var newArray = [];
            this.each(function(index, item) {
                if (predicate(item)) {
                    newArray.push(item);
                }
            });
            this.array = newArray;
            return this;
        },
        //The predicate should return a boolean value
        //Returns true if one element or more matches the predicate
        any: function(predicate) {
            var newArray = [];
            this.each(function(index, item) {
                if (predicate(item)) {
                    newArray.push(item);
                }
            });
            return newArray.length > 0;
        },
        //The predicate should return an object
        //Replaces all elements by the object generated by the predicate
        select: function(predicate) {
            var newArray = [];
            this.each(function(index, item) {
                newArray.push(predicate(item));
            });
            this.array = newArray;
            return this;
        },
        //Returns the current (modified) array
        getArray: function() {
            return this.array;
        }
    };

    collection = function(array) {
        return new Collections(array);
    };
} ());

And here is an exemple of use:

```
var myArray = [{name: 'chicken', size: 1}, {name: 'cat', size: 2},
{name: 'dog', size: 3}, {name: 'horse

To clarify the use of your global variable "collection" as a namespace for your library, you should assign it directly to a value returned by your Immediately Invoked Function Expression:

var collection = (function(){
  ...

  function collection(array) {
    return new Collections(array);
  }

  return collection;
}());

StackExchange Code Review Q#16400, answer score: 2