How to .map array elements which nested in another array?

Question

I have array todos with elements which is also arrays and contain some numbers.

I need to pass through all arrays, how can I do this with .maps() ?

todos = [
[23, 25],
[33, 36],
[55, 66],
]

console.log(todos.map(el => el.map(subEl => subEl)));

you mean need to combine all child array into one ? like [23,25,33,36,55,66] — prasanth
– prasanth, Commented Mar 27, 2021 at 16:25
But you are traversing through all elements... However, map is to be used for mapping. It it is just for passing through all elements, just use for loops (or forEach). — trincot
– trincot, Commented Mar 27, 2021 at 16:27
If you only want to go through them, then you can use foreach or for loops — Afshin Mobayen Khiabani
– Afshin Mobayen Khiabani, Commented Mar 27, 2021 at 16:28
@AlexFlow you are nothing did on using map. you are just returning the argument — prasanth
– prasanth, Commented Mar 27, 2021 at 16:37

Fide · Accepted Answer · 2021-03-27 16:39:12Z

1

Simply: todos.flat().map(x => x)

answered Mar 27, 2021 at 16:39

Fide

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b-rad15 · Accepted Answer · 2021-03-27 16:40:12Z

1

you were pretty close but applied the function at the wrong point I believe this is what you're looking for console.log(todos.map(el => el.map(subEl => subEl)));

todos = [
[23, 25],
[33, 36],
[55, 66],
]

todos.map(el => el.map(subEl => console.log(subEl)));

answered Mar 27, 2021 at 16:40

b-rad15

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