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