Write an array flatten function.

Question

Anonymous · Accepted Answer

let flat = (z = []) => {
            return !Array.isArray(z) ? 
                        [].concat(z) : 
                        (z.length > 0) ? flat(z.splice(0, 1)[0]).concat(flat(z)) : z
        }

Chinmay Pandhare · Answer

I have an O(n) solution for this ;)

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