fixing-readme

README.md

@@ -0,0 +1,32 @@
+A Set data type with the following methods.
+
+  + add
+  + clear
+  + copy
+  + contains
+  + difference
+  + differenceUpdate
+  + foreach
+  + intersection
+  + intersectionUpdate
+  + isDisjoint
+  + isSubset
+  + isSuperset
+  + remove
+  + size
+  + symmetricDifference
+  + union
+  + unionUpdate  
+  + fromArray  
+  + toArray    
+
+ example:
+ var set1 = new Set()
+ var set2 = new Set()
+- set1.add(1).add(2).add(3)
+- set2.add(3).add(4).add(5)
+-
+- set1.union(set2)        => Set<1, 2, 3, 4, 5>
+- set1.intersection(set2) => Set<3>
+-
+- see tests.js for more examples;

set.js

@@ -29,9 +29,10 @@
  + remove
  + size
  + symmetricDifference
- // symmetricDifferenceUpdate
  + union
  + unionUpdate
+ + fromArray
+ + toArray
 */
 
 Set = function(){
@@ -47,6 +48,20 @@ Set.prototype.add = function(val){
     return this;
 }
 
+Set.prototype.fromArray = function(arr){
+  for (var el in arr){
+      this.add(el);
+  }
+}
+
+Set.prototype.toArray = function(){
+    var arr = [];
+    for (var el in this.store){
+        arr.push(el);
+    }
+    return arr;
+}
+
 Set.prototype.clear = function(){
     // removes all elements from the set.
     this.store = {};