Function isNumber

src/engineMath.js:293–293

* Check if object is a valid number, not NaN or undefined, but it may be infinite * @param {any} n * @return {boolean} * @memberof Math

(n)

 * @return {boolean}
 * @memberof Math */
function isNumber(n) { return typeof n === 'number' && !isNaN(n); }

/**
 * Check if a value is stringifiable — i.e. it has a toString that returns