How to get data from an array where length is not fixed

Question

Having an array where length of the array is getting changes(may be increase/may be decrease) but minimum length is 1. Key values are constant for each index of array like below

Myarr =  [ 
  {stdid:1, stddesc:"",coursedetails:"xyz"},
  {stdid:2, stddesc:"ccc",coursedetails:"abc"},.......
]

I want to fetch stdid for all the available index.

Can anyone help me here.

Possible duplicate of [Loop through an array in JavaScript](https://stackoverflow.com/questions/3010840/loop-through-an-array-in-javascript) — Durga, Nov 15 '17 at 10:45

score 0 · Accepted Answer · edited Nov 15 '17 at 14:05

0

You can use ES6 map operator.

Myarr = [{
  stdid: 1,
  stddesc: "",
  coursedetails: "xyz"
}, {
  stdid: 2,
  stddesc: "ccc",
  coursedetails: "abc"
}]
let idArr = Myarr.map(x => x.stdid);
console.log(idArr);

edited Nov 15 '17 at 14:05

mplungjan

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answered Nov 15 '17 at 10:40

Karthik RP

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you changed the structure of input. – Durga Nov 15 '17 at 10:41
1

Yes, because the question has also been changed. – Karthik RP Nov 15 '17 at 10:42
1

Myarr.map(x => x.stdid); is working properly. Thanks a lot. – GhostA Nov 15 '17 at 10:48

How to get data from an array where length is not fixed

1 Answers1