Function isFunction

src/shared/functions/toArray.js:724–729

* Checks if `value` is classified as a `Function` object. * * @static * @memberOf _ * @since 0.1.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is a function, else `false`. * @example * * _.isFunction(_); * // => true * * _.isFun

(value)

 * // => false
 */
function isFunction(value) {
  // The use of `Object#toString` avoids issues with the `typeof` operator
  // in Safari 8-9 which returns 'object' for typed array and other constructors.
  const tag = isObject(value) ? objectToString.call(value) : "";
  return tag === funcTag || tag === genTag;
}

/**
 * Checks if `value` is a valid array-like length.