Create 9Map&Set.js

Author: Sunanda01

AdvancedJS/9Map&Set.js

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+//>  Map
+// Map->Collection of unique Data , Map is object Constructor (update new value or override new player)
+let mymap=new Map([[-1,"RM-1"],[0,"RM0"]]);
+mymap.set(1,"RM1");//always in key value paits
+mymap.set(2,"RM2");
+mymap.set(3,"RM3");
+console.log(mymap);
+// Map(5) {-1 => 'RM-1', 0 => 'RM0', 1 => 'RM1', 2 => 'RM2', 3 => 'RM3'}
+// [[Prototype]]:Map
+
+// We can use for loop and there are many other methods and key word also
+for(let [key,value] of mymap){
+    console.log(key + " " + value);
+
+}
+mymap.delete(2);//delete
+console.log(mymap);
+
+mymap.clear();//clear
+console.log(mymap.get(-1));//return value of that index
+
+
+
+// Weak MAP-> only store obj and cant be iterated
+
+let wm=new WeakMap();
+let ob1={};
+let ob2={};
+
+wm.set(ob1,"private");
+wm.set(ob2,"Private data");
+----------------------------------------Set------------------------------
+Set  -> Collection of unique Data , Set is object Constructor
+
+var arr=[1,4,7,2,5,4];
+let objSet=new Set(arr);
+console.log(objSet);
+
+objSet.add(value);//add value
+objSet.delete(value);//delete value
+objSet.clear();//clear
+objSet.has();//check
+
+
+
+
+//Weak Set -> we can store only object here but we cant iterate it
+let ws=new WeakSet();
+let ob1={};
+let ob2={};
+ws.add(ob1);
+ws.add(ob2);
+
+console.log(ws);
+
+#Note-> All set Functions are available here but cant do iteration