mathjs/lib/utils/collection/isCollection.js

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser and offers an integrated solution to work with numbers, big numbers, complex numbers, units, and matrices.

'use strict';

/**
 * Test whether a value is a collection: an Array or Matrix
 * @param {*} x
 * @returns {boolean} isCollection
 */
module.exports = function isCollection (x) {
  return (Array.isArray(x) || (x && x.isMatrix === true));
};