/**
 * @author Titus Wormer
 * @copyright 2016 Titus Wormer
 * @license MIT
 * @module is-hexadecimal
 * @fileoverview Check if a character is hexadecimal.
 */

'use strict';

/* eslint-env commonjs */

/* Expose. */
module.exports = hexadecimal;

/**
 * Check whether the given character code, or the character
 * code at the first character, is hexadecimal.
 *
 * @param {string|number} character
 * @return {boolean} - Whether `character` is hexadecimal.
 */
function hexadecimal(character) {
  var code = typeof character === 'string' ?
    character.charCodeAt(0) : character;

  return (code >= 97 /* a */ && code <= 102 /* z */) ||
    (code >= 65 /* A */ && code <= 70 /* Z */) ||
    (code >= 48 /* A */ && code <= 57 /* Z */);
}