node/tools/eslint/node_modules/is-alphabetical/index.js
Vse Mozhet Byt b4fea2a3d6 doc: add eslint-plugin-markdown
* install eslint-plugin-markdown
* add doc/.eslintrc.yaml
* add `<!-- eslint-disable rule -->` or `<!-- eslint-disable -->`
  for the rest of problematic code
* .js files in doc folder added to .eslintignore
* update Makefile and vcbuild.bat

PR-URL: https://github.com/nodejs/node/pull/12563
Refs: https://github.com/nodejs/node/pull/12557#issuecomment-296015032
Reviewed-By: Teddy Katz <teddy.katz@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
2017-04-25 00:06:17 +03:00

30 lines
683 B
JavaScript

/**
* @author Titus Wormer
* @copyright 2016 Titus Wormer
* @license MIT
* @module is-alphabetical
* @fileoverview Check if a character is alphabetical.
*/
'use strict';
/* eslint-env commonjs */
/* Expose. */
module.exports = alphabetical;
/**
* Check whether the given character code, or the character
* code at the first character, is alphabetical.
*
* @param {string|number} character
* @return {boolean} - Whether `character` is alphabetical.
*/
function alphabetical(character) {
var code = typeof character === 'string' ?
character.charCodeAt(0) : character;
return (code >= 97 && code <= 122) || /* a-z */
(code >= 65 && code <= 90); /* A-Z */
}