Mastering JavaScript

Chapter 3
The concat() method joins two arrays and returns a new array:
var myArray = new Array("33", "44", "55");
myArray = myArray.concat("3", "2", "1");
console.log(myArray);
// ["33", "44", "55", "3", "2", "1"]
The join() method joins all the elements of an array into a string. This can be useful
while processing a list. The default delimiter is a comma (,):
var myArray = new Array('Red','Blue','Yellow');
var list = myArray.join(" ~ ");
console.log(list);
//"Red ~ Blue ~ Yellow"
The pop() method removes the last element from an array and returns that element.
This is analogous to the pop() method of a stack:
var myArray = new Array("1", "2", "3");
var last = myArray.pop();
// myArray = ["1", "2"], last = "3"
The push() method adds one or more elements to the end of an array and returns
the resulting length of the array:
var myArray = new Array("1", "2");
myArray.push("3");
// myArray = ["1", "2", "3"]
The shift() method removes the first element from an array and returns that
element:
var myArray = new Array ("1", "2", "3");
var first = myArray.shift();
// myArray = ["2", "3"], first = "1"
The unshift() method adds one or more elements to the front of an array and
returns the new length of the array:
var myArray = new Array ("1", "2", "3");
myArray.unshift("4", "5");
// myArray = ["4", "5", "1", "2", "3"]
The reverse() method reverses or transposes the elements of an array—the first
array element becomes the last and the last becomes the first:
var myArray = new Array ("1", "2", "3");
myArray.reverse();
// transposes the array so that myArray = [ "3", "2", "1" ]
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