Array functions in JavaScript

Here are some of the functions useful for array operations

Push() - Appends one or more elements to the end of an array

var data = [ "A" ];
data.push( "B" );
data.push( "C" );

Result
data = ["A","B","C"]

Pop() - Pops out (removes) one element from the end of an array

var data = ["A","B","C"];
data.pop();

Result
data = ["A","B"];

Unshift() - Adds one or more elements to the beginning of an array

var data = [ "A" ];
data.unshift( "B","X" );
data.unshift( "C" );

Result
data = ["C","B","X","A"]

Shift() - Removes one element from the beginning of an array

var data = ["A","B","C"];
data.shift();

Result
data = ["B","C"];

Splice() - Removes elements specified number of items from the starting index and also optionally allows insertion of items on the start index.

// array.splice(start Position,number of elements,[elements to be inserted])

var data = ["A","B","C","D"];
console.log(data.splice(1,2,"x","y"));
console.log(data);

Result
["B", "C"]
["A", "x", "y", "D"]

Thanks to Ben Nadel for sharing this useful piece of information.