how to insert object to Specific index in object array using javascript

Question

I want to insert object Specific index.

I research push and splice but I couldn't find a solution.

var collection = [ {id:"123"} ,{id:"567"}, {id:"999"} ]

The result I'm looking forward to is

result :

[ {id:"123"} ,{id:"567"}, {id:"1111"}, {id:"999"} ]

score 2 · Answer 1 · answered May 26 '19 at 05:56

2

var collection = [{id:"123"} ,{id:"567"}, {id:"999"}];
collection.splice(2, 0, { id: "1111" });
console.log(collection);

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answered May 26 '19 at 05:56

Jack Bashford

I tried mycode, but I asked you a question because I'm sorry. Thank you! – mara May 26 '19 at 05:58

score 0 · Answer 2 · answered May 26 '19 at 05:58

0

You can use splice method of Array collection.splice(index, value, numberOfElWillBeRemoved, numberOfElWillBeAdded) For more detail: https://www.w3schools.com/jsref/jsref_splice.asp

answered May 26 '19 at 05:58

Nhut Dinh Ba

score 0 · Answer 3 · answered May 26 '19 at 05:59

You can loop trow array:

var collection = [{ id: "123" }, { id: "567" }, { id: "999" }];

for(var i = 0; i < collection.length; i++) {
    console.log(collection[i]);
}

And change the array length

collection.length = 4

Then replace location of any string. Just make new same array and replace the var

var newArray = collection;
collection[3] = newArray[2];

Now 2 index is free.

3 Answers3