Creating An Associative Array In JavaScript With Push()?

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Creating an associative array in JavaScript with push()? JavascriptWeb DevelopmentObject Oriented Programming

For this, use forEach() loop along with push(). Following is the code −

Example

var studentDetails= [    {       studentId:1,       studentName:"John"    },    {       studentId:1,       studentName:"David"    },    {       studentId:2,       studentName:"Bob"    },    {       studentId:2,       studentName:"Carol"    } ] studentObject={}; studentDetails.forEach (function (obj){    studentObject[obj.studentId] = studentObject[obj.studentId] || [];    studentObject[obj.studentId].push(obj.studentName); }); console.log(studentObject);

To run the above program, you need to use the following command −

node fileName.js.

Here, my file name is demo116.js.

Output

This will produce the following output −

PS C:\Users\Amit\JavaScript-code> node demo116.js { '1': [ 'John', 'David' ], '2': [ 'Bob', 'Carol' ] } AmitDiwan AmitDiwan Updated on: 2020-09-09T13:20:18+05:30

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