Hi everybody, I'm Aya Bouchiha, on this amazing day, we will talk about all Set Methods and Properties like has(), add(), and size.

Definition of Set Object

Set: is a collection of items and a built-in object, which stores only unique values.

Set Constructor

Iteration over a Set using For of loop

Size Property

size: is a set property that returns the length of the unique items in a specified set.

Set Methods

Set.prototype.add()

add(valueToAdd): is a set method that lets you add a new element to the specified Set.

Set.prototype.delete()

delete(valueToDelete): is a set method that lets you remove an element in a specified Set.

Set.prototype.clear()

clear(): means deleting all set elements.

Set.prototype.has()

has(valueToCheck): checks if the given value exists in a set.

Set.prototype.entries()

entries(): returns an array(iterator) [val, val] for each item in the specified Set.

Set.prototype.values()

values(): like keys(), It returns a new iterator object which contains the values for each element in the specified Set.

Set.prototype.forEach()

forEach(callback): this Set method invokes a callback for each element in the specified Set.

Summary

• size: returns the length of the unique items in a specified set.
• add(valueToAdd): lets you add a new element to the specified Set.
• delete(valueToDelete):lets you remove an element in a specified Set.
• clear(): delete all Set elements.
• has(valueToCheck): checks if the given value exists in a set.
• entries(): returns an array(iterator) [val, val] for each item in the specified Set.
• values(): returns a new iterator object which contains the values for each element in the specified Set.

1. forEach(callback): invokes a callback for each element in the specified Set.

References

• www.w3schools.com
• www.developer.mozilla.org

Have a great day!

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• telegram: Aya Bouchiha