how to add into a array obj code example

Example 1: how to append objects to javascript lists ?

var studentList = ['Jason', 'Samantha', 'Alice', 'Joseph'];

//Add a new student to the end of the student list
studentList.push('Jacob');
//list is updated to ['Jason', 'Samantha', 'Alice', 'Joseph', 'Jacob'];

Example 2: how to add object to list in javascript

var a=[]
var b={};
a.push(b);