/**
* Convert string into hankaku.
* @function lib.string.toHankaku
* @param {string} str - String to convert.
* @returns {string} Hankaku string.
*/
var _patterns = require('./_patterns');
module.exports = function (str) {
return str && str.replace(_patterns.ZENKAKU, function ($0) {
return String.fromCharCode($0.charCodeAt(0) - 0xFEE0);
});
};