Array utility functions

array-utility.js

/**
 * Flattens the multidimensional array
 * @param {Array} array - some multidimensional array
 * @returns {Array} flattened array
 */
function flatten(array) {
    return array.reduce(function(acc, curr) {
        var items = Array.isArray(curr)? flatten(curr) : [curr];
        return acc.concat(items);
    }, []);
}