is there any way to merge sub-array and child sub-array into one in javascript?

Question

let arr = [A, B, C, [D, E, F, [G, H, I]]];
I've tried many array methods but eventually I didn't get expected result.
I need output like this
let arr = [A, B, C, D, E, F, G, H, I];

or `arr.flat(Infinity)` if you don't know the depth beforehand — adiga, Jan 14 '20 at 08:05

score 1 · Accepted Answer · answered Jan 14 '20 at 07:43

1

You can do it like this,

const arrays = ["A", "B", "C", ["D", "E", "F", ["G","H", "I"]]];
const merge3 = arrays.flat(2); //The depth level specifying how deep a nested array structure should be flattened. Defaults to 1.
console.log(merge3);

answered Jan 14 '20 at 07:43

Channa

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score 0 · Answer 2 · answered Jan 14 '20 at 07:54

For flatten an n-dimensional array using reduce and concat

function flatArray(arr) {
  return arr.reduce(function (flat, toFlatten) {
    return flat.concat(Array.isArray(toFlatten) ? flatArray(toFlatten) : toFlatten);
  }, []);
}



console.log(flatArray(['A', 'B', 'C', ['D', 'E', 'F', ['G', 'H', 'I']]]));

is there any way to merge sub-array and child sub-array into one in javascript?

2 Answers2