Method flatMap

src/api/data-array.ts:225–235

(f: ArrayFunc<T, U[]>)

    }

    public flatMap<U>(f: ArrayFunc<T, U[]>): DataArray<U> {
        let result = [];
        for (let index = 0; index < this.length; index++) {
            let value = f(this.values[index], index, this.values);
            if (!value || value.length == 0) continue;

            for (let r of value) result.push(r);
        }

        return this.lwrap(result);
    }

    public mutate(f: ArrayFunc<T, void>): DataArray<T> {
        for (let index = 0; index < this.values.length; index++) {