Which method is used to Clear an array using JavaSctipt?

There is no clear() method available in javascript. You can use following methods to clear arrays

Method 1:

var a =  [1,2,3,4];

a = [];

// empty array

Method 2:

var a =  new Array(1,2,3,4);

a = new Array();

// reinitialize array

Method 3:

a.length = 0;

Method 4: // recommended

a.splice(0, a.length);