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JS Notes

set

it is itrable
sets also have its owen methods
No index-bsed access
Order is not guaranteed
Uniqe items only ( No duplicates allowed )

javascript

const array1 = ["item1", "item2", "item3"];
const array2 = ["item1", "item2", "item3"];

const numbers = new Set([1, 2, 3]);
numbers.add(4);
numbers.add(5);
numbers.add(array1);
numbers.add(array2);

// works because the memory location of both arrays is different.

for (let num of numbers) {
  console.log(num);
}

numbers.has(1); // return True or False

MAP

map is different than array.map() function