Convert an array of strings to numbers

const toNumbers = arr => arr.map(Number);

// Or
const toNumbers = arr => arr.map(x => +x);

// Example
toNumbers(['2', '3', '4']);

// [2, 3, 4]

Comments

[Itachi Uchiha]

You'll get NaN in following scenarios:

Empty string -> ''

String with space ' '

function definition => () => {}

undefined value => undefined

null value => null

[syedsimanta03]

we can use ts or input validation when writing any function