Map

CRUD Operations

	Syntax	Example
Create	let map = new Map()	let mapping = new Map();
Update - Add/ Modify	map.set(key,value)	mapping.set("key",1);
	Add array map.set([[key1,value1],[key2,value2]])	mapping.set([["2",2],["3",3],["4",4]]);
	Add object map.set(Object.entries(obj));	mapping.set(Object.entries({one:1,two:2}));
Read	map.get(key)	mapping.get("key");
Delete	map.delete(key)	mapping.delete("key");
	map.clear()	mapping.clear()

	Syntax	Example
Size	map.size	map.set(1,1);map.set(2,”two”); map.size//2
Check if element exists	map.has(key)	map.has(“key”);
Iteration	For..of, forEach
	map.keys() //returns iterable	map.keys()//{1,2}
	map.values()// returns iterable	map.values()//{1,”two”}
	map.entries()// returns iterable	map.entries()//{1 => 1, 2 => "two"}

	Syntax	Example
Create	Let set = new Set();	Let set = new Set();
Read
Update - Add/ Modify	set.add(value);	set.add(“John”); set.add(“John”); set.size//1
Delete	set.delete(value);	set.delete(“John”);
	set.clear();	set.clear();