Javascript Set

In JavaScript, a Set is a built-in object that allows us to store unique values of any type, whether primitive values or object references.

Sets are similar to arrays, but they only allow unique values, which means no duplicate elements are allowed.

Here's a basic overview of how we can use Sets in JavaScript:

Creating a Set:

// Creating an empty Set
let yourSet = new Set();



// Creating a Set with initial values
let numberSet = new Set([1, 2, 3, 4, 5, 6, 7]);

// We can also use the add method to add elements to a Set
numberSet.add(8);

Methods and Operations:

add(value): Adds a new element with the specified value to the Set.

Example:

// Creating an empty Set
let yourSet = new Set();

yourSet.add("red");
yourSet.add("green");
yourSet.add("red"); // Duplicate values are ignored

Example:

yourSet.delete("green");

Example:

console.log(yourSet.has("red")); // true
console.log(yourSet.has("green")); // false

Example:

console.log(yourSet.size); // 1

Example:

yourSet.clear();

delete(value): Removes the specified value from the Set.

has(value): Returns a boolean indicating whether the Set contains a specific value.

Example:

yourSet.forEach((value) => {
  console.log(value);
});

// Or using a for...of loop
for (let value of yourSet) {
  console.log(value);
}

size: Returns the number of elements in the Set.

clear(): Removes all elements from the Set.

Iterating over a Set:

We can use the "forEach" method or the for...of loop to iterate over the elements of a Set.

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