@jscad/array-utils/src/flatten.js

Array Utilities for JSCAD

/**
 * Flatten the given array into a single array of elements.
 * The given array can be composed of multiple depths of objects and or arrays.
 * @param {Array} array - array to flatten
 * @returns {Array} a flat array with a single list of elements
 * @alias module:array-utils.flatten
 * @example
 * const flat = flatten([[1], [2, 3, [4, 5]], 6]) // returns [1, 2, 3, 4, 5, 6]
 */
const flatten = (arr) => arr.reduce((acc, val) => Array.isArray(val) ? acc.concat(flatten(val)) : acc.concat(val), [])

module.exports = flatten