Function isNumber

MathBox/mathbox-bundle.js:37622–37625

* Checks if `value` is a number. * * Note: `NaN` is considered a number. See http://es5.github.io/#x8.5. * * @static * @memberOf _ * @category Objects * @param {*} value The value to check. * @returns {boolean} Returns `true` if the `value` is a number, else `

(value)

     * // => true
     */
    function isNumber(value) {
      return typeof value == 'number' ||
        value && typeof value == 'object' && toString.call(value) == numberClass || false;
    }

    /**
     * Checks if `value` is an object created by the `Object` constructor.