how to use key in the value side inside a javascript object

Asked May 28 '22 at 02:06

Active May 28 '22 at 02:09

Viewed 12 times

-1

in the code bellow i tried to access the key in the value side but it shows an error that cannot use map on undefined i know i can use the obj variable and do what i need, but the problem is that on my task i don't have a variable name...

let obj = {nums: [1,2,3,4]}
obj = {
   nums: nums.map((num) => {return num++})
}

edited May 28 '22 at 02:09

asked May 28 '22 at 02:06

elkhayate

`this` references the window (or undefined, in strict mode) - referencing it here doesn't make any sense, just reference the object you declared - `obj`, not `this` – CertainPerformance May 28 '22 at 02:08
i dont have access to variable name how to reuse key in the value side ? – elkhayate May 28 '22 at 02:12
How about simply `obj.nums = obj.nums.map((num) => ++num);`? Note that you need to use prefix ++ – tromgy May 28 '22 at 02:15

how to use key in the value side inside a javascript object

0 Answers0