how to use for each with nested array

Question

I want to log each occurrence of the letter an in this array, the expected output should be 3 a's, but there are none because it does dot read nested arrays does anyone know a solution.

let items = [["a","b"],["c","a"],["b","a"]];
items.forEach((v) => (v === "a" && console.log(v)));

Unmitigated · Accepted Answer · 2021-09-26 02:12:50Z

2

You can flatten the array before looping, which will work for any level of nesting.

let items = [["a","b"],["c","a"],["b","a"]];
items.flat(Infinity).forEach((v) => (v === "a" && console.log(v)));

answered Sep 26, 2021 at 2:12

Unmitigated

91.4k12 gold badges102 silver badges109 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

4EACH · Accepted Answer · 2021-09-26 02:19:43Z

1

Flat array > Filter array > Foreach on filtered array

    let items = [["a","b"],["c","a"],["b","a"]];
    items.flat(Infinity)
         .filter((v) => (v === "a"))
         .forEach((v) => (console.log(v)));

answered Sep 26, 2021 at 2:19

4EACH

2,1974 gold badges20 silver badges31 bronze badges

Collectives™ on Stack Overflow

how to use for each with nested array

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related