module.exports = function (obj) { var addProperty = function (method, func) { String.prototype.__defineGetter__(method, func); }; var stringPrototypeBlacklist = [ '__defineGetter__', '__defineSetter__', '__lookupGetter__', '__lookupSetter__', 'charAt', 'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable', 'toLocaleString', 'toString', 'valueOf', 'charCodeAt', 'indexOf', 'lastIndexof', 'length', 'localeCompare', 'match', 'replace', 'search', 'slice', 'split', 'substring', 'toLocaleLowerCase', 'toLocaleUpperCase', 'toLowerCase', 'toUpperCase', 'trim', 'trimLeft', 'trimRight', 'gsub', ]; Object.keys(obj).forEach(function (key) { if (key != 'inflect' && key != 'inflections') { if (stringPrototypeBlacklist.indexOf(key) !== -1) { console.log('warn: You should not override String.prototype.' + key); } else { addProperty(key, function () { return obj[key](this); }); } } }); };