--- /dev/null
+'use strict';
+
+var value = require('../../object/valid-value')
+ , contains = require('./contains')
+
+ , filter = Array.prototype.filter;
+
+module.exports = function (other) {
+ (value(this) && value(other));
+ return filter.call(this, function (item) {
+ return !contains.call(other, item);
+ });
+};