Converting number string into number in an array

Question

I have an array containing single strings. e.g. ["a", "b", "3", "c"]; However, I need any number in this array to be a number and not a string.

Result would be ["a", "b", 3, "c"]; so I could then run a regex and get all numbers out of the array.

Hope this is clear enough.

Code Maniac · Accepted Answer · 2019-08-11 16:58:45Z

4

You can use map and isNaN

let a = ["a", "b", "3", "c"];
let final = a.map(val => !isNaN(val) ? +val : val)
console.log(final)

answered Aug 11, 2019 at 16:57

Code Maniac

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1 Comment

@Tony you can accept an answer by clicking on the grey checkmark on the left (You get 2 reps as well)

Emeeus · Accepted Answer · 2019-08-11 19:04:54Z

1

You could use + since NaN is evaluated as false if the value is not a number, so (+e || e) returns a number or the original value:

const array = ["a", "b", "3", "c"];
const res = array.map(e=>(+e || e));

console.log(res);

answered Aug 11, 2019 at 18:55

Emeeus

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