Array of object not assigning value through spread operator correctly

Asked Apr 19 '19 at 03:28

Active Apr 19 '19 at 03:30

Viewed 24 times

I am using spread operator but my operation is not working correctly.

Here is my code and problem.

I declare a array of object.

let obj = [{id:1,name:"a"},{id:2,name:"b"}] then i am copying this to another variable. like this.

let newObj = {...obj}

now after copying what i am getting in newObj is object of array. means i can access newObj[0] or newObj[1] but i can not use for loop. I can not access newObj.length. how to fix this problem. can anybody please suggest that.

asked Apr 19 '19 at 03:28

David

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If you want to shallow clone an array, use `slice`. If you want to deep clone it, use `JSON.stringify` / `parse` or something recursive. It's *really weird* to try to turn an array into a non-array object - best to avoid that unless there's no other way – CertainPerformance Apr 19 '19 at 03:31
Then in that case when to use spread operator. – David Apr 19 '19 at 03:32
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Use object spread when you want to create a new *object*. Use array spread when you want to create a new array. – CertainPerformance Apr 19 '19 at 03:33
oh. noted, thanjs – David Apr 19 '19 at 03:34

Array of object not assigning value through spread operator correctly

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