toQueryString() and fromQueryString() mixins for underscore.js

querystring.underscore.js

/*
 * Copyright (c) 2012-2013 [CodeCatalyst, LLC](http://www.codecatalyst.com/).
 * Open source under the [MIT License](http://en.wikipedia.org/wiki/MIT_License).
 */
require( [ 'underscore' ], function ( _ ) {
  _.mixin( {
    'toQueryString': function ( parameters ) {
      var queryString = _.reduce(
        parameters,
        function ( components, value, key ) {
          components.push( key + '=' + encodeURIComponent( value ) );
          return components;
        },
        []
      ).join( '&' );
      if ( queryString.length > 0 ) {
        queryString = '?' + queryString;
      }
      return queryString;
    },
    
    'fromQueryString': function ( queryString ) {
      return _.reduce(
        queryString.replace( '?', '' ).split( '&' ),
        function ( parameters, parameter ) {
          if ( parameter.length > 0 ) {
            _.extend( parameters, _.object( [ _.map( parameter.split( '=' ), decodeURIComponent ) ] ) );
          }
          return parameters;
        },
        {}
      );
    }
  } );
} );