/**
* Convert a string into katakana.
* @function lib.string.toKatakana
* @param {string} str - String to convert.
* @returns {string} - Katakana string.
* @author Taka Okunishi
*
*/
var _patterns = require('./_patterns');
module.exports = function (str) {
return str && str.replace(_patterns.HIRAGANA, function ($0) {
return String.fromCharCode($0.charCodeAt(0) + 0x60);
});
};