--- /dev/null
+'use strict';
+
+var indexOf = require('./e-index-of')
+
+ , filter = Array.prototype.filter
+
+ , isFirst;
+
+isFirst = function (value, index) {
+ return indexOf.call(this, value) === index;
+};
+
+module.exports = function () { return filter.call(this, isFirst, this); };