Izmjenjena struktura, dodan backand

web/node_modules/es6-set/ext/copy.js

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+'use strict';
+
+var Set = require('../');
+
+module.exports = function () { return new Set(this); };

web/node_modules/es6-set/ext/every.js

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+'use strict';
+
+var callable = require('es5-ext/object/valid-callable')
+  , forOf    = require('es6-iterator/for-of')
+
+  , call = Function.prototype.call;
+
+module.exports = function (cb/*, thisArg*/) {
+	var thisArg = arguments[1], result = true;
+	callable(cb);
+	forOf(this, function (value, doBreak) {
+		if (!call.call(cb, thisArg, value)) {
+			result = false;
+			doBreak();
+		}
+	});
+	return result;
+};

web/node_modules/es6-set/ext/filter.js

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+'use strict';
+
+var callable = require('es5-ext/object/valid-callable')
+  , forOf    = require('es6-iterator/for-of')
+  , isSet    = require('../is-set')
+  , Set      = require('../')
+
+  , call = Function.prototype.call;
+
+module.exports = function (cb/*, thisArg*/) {
+	var thisArg = arguments[1], result;
+	callable(cb);
+	result = isSet(this) ? new this.constructor() : new Set();
+	forOf(this, function (value) {
+		if (call.call(cb, thisArg, value)) result.add(value);
+	});
+	return result;
+};

web/node_modules/es6-set/ext/get-first.js

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+'use strict';
+
+module.exports = function () {
+	return this.values().next().value;
+};

web/node_modules/es6-set/ext/get-last.js

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+'use strict';
+
+module.exports = function () {
+	var value, iterator = this.values(), item;
+	while (true) {
+		item = iterator.next();
+		if (item.done) break;
+		value = item.value;
+	}
+	return value;
+};

web/node_modules/es6-set/ext/some.js

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+'use strict';
+
+var callable = require('es5-ext/object/valid-callable')
+  , forOf    = require('es6-iterator/for-of')
+
+  , call = Function.prototype.call;
+
+module.exports = function (cb/*, thisArg*/) {
+	var thisArg = arguments[1], result = false;
+	callable(cb);
+	forOf(this, function (value, doBreak) {
+		if (call.call(cb, thisArg, value)) {
+			result = true;
+			doBreak();
+		}
+	});
+	return result;
+};