var filters = {

 orderBy: orderBy,
 filterBy: filterBy,
 limitBy: limitBy,

 /**
 * Stringify value.
 *
 * @param {Number} indent
 */

 json: {
 read: function read(value, indent) {
 return typeof value === 'string' ? value : JSON.stringify(value, null, Number(indent) || 2);
 },
 write: function write(value) {
 try {
 return JSON.parse(value);
 } catch (e) {
 return value;
 }
 }
 },

 /**
 * 'abc' => 'Abc'
 */

 capitalize: function capitalize(value) {
 if (!value && value !== 0) return '';
 value = value.toString();
 return value.charAt(0).toUpperCase() + value.slice(1);
 },

 /**
 * 'abc' => 'ABC'
 */

 uppercase: function uppercase(value) {
 return value || value === 0 ? value.toString().toUpperCase() : '';
 },

 /**
 * 'AbC' => 'abc'
 */

 lowercase: function lowercase(value) {
 return value || value === 0 ? value.toString().toLowerCase() : '';
 },

 /**
 * 12345 => $12,345.00
 *
 * @param {String} sign
 */

 currency: function currency(value, _currency) {
 value = parseFloat(value);
 if (!isFinite(value) || !value && value !== 0) return '';
 _currency = _currency != null ? _currency : '$';
 var stringified = Math.abs(value).toFixed(2);
 var _int = stringified.slice(0, -3);
 var i = _int.length % 3;
 var head = i > 0 ? _int.slice(0, i) + (_int.length > 3 ? ',' : '') : '';
 var _float = stringified.slice(-3);
 var sign = value < 0 ? '-' : '';
 return sign + _currency + head + _int.slice(i).replace(digitsRE, '$1,') + _float;
 },

 /**
 * 'item' => 'items'
 *
 * @params
 * an array of strings corresponding to
 * the single, double, triple ... forms of the word to
 * be pluralized. When the number to be pluralized
 * exceeds the length of the args, it will use the last
 * entry in the array.
 *
 * e.g. ['single', 'double', 'triple', 'multiple']
 */

 pluralize: function pluralize(value) {
 var args = toArray(arguments, 1);
 return args.length > 1 ? args[value % 10 - 1] || args[args.length - 1] : args[0] + (value === 1 ? '' : 's');
 },

 /**
 * Debounce a handler function.
 *
 * @param {Function} handler
 * @param {Number} delay = 300
 * @return {Function}
 */

 debounce: function debounce(handler, delay) {
 if (!handler) return;
 if (!delay) {
 delay = 300;
 }
 return _debounce(handler, delay);
 }
 };