name : underscore-mixins.js _.mixin({ // ### _.objMap // _.map for objects, keeps key/value associations objMap: function (input, mapper, context) { return _.reduce(input, function (obj, v, k) { obj[k] = mapper.call(context, v, k, input); return obj; }, {}, context); }, // ### _.objFilter // _.filter for objects, keeps key/value associations // but only includes the properties that pass test(). objFilter: function (input, test, context) { return _.reduce(input, function (obj, v, k) { if (test.call(context, v, k, input)) { obj[k] = v; } return obj; }, {}, context); }, // ### _.objReject // // _.reject for objects, keeps key/value associations // but does not include the properties that pass test(). objReject: function (input, test, context) { return _.reduce(input, function (obj, v, k) { if (!test.call(context, v, k, input)) { obj[k] = v; } return obj; }, {}, context); } });