You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
61 lines
1.6 KiB
61 lines
1.6 KiB
/**
|
|
* @fileoverview Utilities to operate on strings.
|
|
* @author Stephen Wade
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Requirements
|
|
//------------------------------------------------------------------------------
|
|
|
|
const Graphemer = require("graphemer").default;
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Helpers
|
|
//------------------------------------------------------------------------------
|
|
|
|
// eslint-disable-next-line no-control-regex -- intentionally including control characters
|
|
const ASCII_REGEX = /^[\u0000-\u007f]*$/u;
|
|
|
|
/** @type {Graphemer | undefined} */
|
|
let splitter;
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Public Interface
|
|
//------------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Converts the first letter of a string to uppercase.
|
|
* @param {string} string The string to operate on
|
|
* @returns {string} The converted string
|
|
*/
|
|
function upperCaseFirst(string) {
|
|
if (string.length <= 1) {
|
|
return string.toUpperCase();
|
|
}
|
|
return string[0].toUpperCase() + string.slice(1);
|
|
}
|
|
|
|
/**
|
|
* Counts graphemes in a given string.
|
|
* @param {string} value A string to count graphemes.
|
|
* @returns {number} The number of graphemes in `value`.
|
|
*/
|
|
function getGraphemeCount(value) {
|
|
if (ASCII_REGEX.test(value)) {
|
|
return value.length;
|
|
}
|
|
|
|
if (!splitter) {
|
|
splitter = new Graphemer();
|
|
}
|
|
|
|
return splitter.countGraphemes(value);
|
|
}
|
|
|
|
module.exports = {
|
|
upperCaseFirst,
|
|
getGraphemeCount
|
|
};
|