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31 lines
739 B
31 lines
739 B
8 years ago
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/**
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* @author Titus Wormer
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* @copyright 2016 Titus Wormer
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* @license MIT
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* @module is-hexadecimal
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* @fileoverview Check if a character is hexadecimal.
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*/
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'use strict';
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/* eslint-env commonjs */
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/* Expose. */
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module.exports = hexadecimal;
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/**
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* Check whether the given character code, or the character
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* code at the first character, is hexadecimal.
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*
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* @param {string|number} character
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* @return {boolean} - Whether `character` is hexadecimal.
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*/
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function hexadecimal(character) {
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var code = typeof character === 'string' ?
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character.charCodeAt(0) : character;
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return (code >= 97 /* a */ && code <= 102 /* z */) ||
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(code >= 65 /* A */ && code <= 70 /* Z */) ||
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(code >= 48 /* A */ && code <= 57 /* Z */);
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}
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