arosca

const { expect } = require('chai');

/**
 * Flattens nested arrays
 * @param {Array} array The array to flatten.
 * @returns {Array} Returns the new flattened array.
 */
const flatten = (arr: Array<any>): Array<number> => arr.toString().split(',').map(x => parseInt(x, 10)).filter(x => !!x) || [];

describe('flatten', () => {