Sets.js

et arrayOne=['1','2','1','2']

console.log(arrayOne)
// ['1','2','1','2']
 
let setOne= new Set(arrayOne) 

for(elem of setOne){
  console.log(elem)
}
//'1'
//'2'


// Another way of doing
let setTwo= [...new Set(arrayOne)]

console.log(setTwo)
// ["1" ,"2"]


/*
Sets methods: 
add
size
has
forEach
delete
clear
*/