examples using ES6 Set class

loiane · loiane · commit d0aa9d55bc5e · 2016-02-13T11:47:00.000-02:00
diff --git a/chapter06/04-UsingES6Set.html b/chapter06/04-UsingES6Set.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+<head lang="en">
+    <meta charset="UTF-8">
+    <title></title>
+</head>
+<body>
+<script src="04-UsingES6Set.js"></script>
+</body>
+</html>
diff --git a/chapter06/04-UsingES6Set.js b/chapter06/04-UsingES6Set.js
@@ -0,0 +1,71 @@
+let set = new Set();
+
+set.add(1);
+console.log(set.values()); //outputs @Iterator
+console.log(set.has(1));   //outputs true
+console.log(set.size);   //outputs 1
+
+set.add(2);
+console.log(set.values()); //outputs [1, 2]
+console.log(set.has(2));   //true
+console.log(set.size);   //2
+
+set.delete(1);
+console.log(set.values()); //outputs [2]
+
+set.delete(2);
+console.log(set.values()); //outputs []
+
+let setA = new Set();
+setA.add(1);
+setA.add(2);
+setA.add(3);
+
+let setB = new Set();
+setB.add(2);
+setB.add(3);
+setB.add(4);
+
+//--------- Union ----------
+let unionAb = new Set();
+for (let x of setA) unionAb.add(x);
+for (let x of setB) unionAb.add(x);
+console.log(unionAb);
+
+//--------- Intersection ----------
+let intersection = function(setA, setB){
+    let intersectionSet = new Set();
+
+    for (let x of setA){
+        if (setB.has(x)){
+            intersectionSet.add(x);
+        }
+    }
+
+    return intersectionSet;
+};
+let intersectionAB = intersection(setA, setB);
+console.log(intersectionAB);
+
+//alternative - works on FF only
+//intersectionAb = new Set([x for (x of setA) if (setB.has(x))]);
+//console.log(intersectionAB);
+
+//--------- Difference ----------
+let difference = function(setA, setB){
+    let intersectionSet = new Set();
+
+    for (let x of setA){
+        if (!setB.has(x)){
+            intersectionSet.add(x);
+        }
+    }
+
+    return intersectionSet;
+};
+let differenceAB = difference(setA, setB);
+console.log(differenceAB);
+
+//alternative  - works on FF only
+//differenceAB = new Set([x for (x of setA) if (!setB.has(x))]);
+//console.log(differenceAB);
