How to check if a Set is Not Empty in JavaScript

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How to check if a Set is Not Empty in JavaScript ?

Answer

To check if a Set is not empty in JavaScript, you can use the size property or the size() method.

✐ Examples

1 Check if Set is Not Empty Using size Property

In this example,

We define a non-empty set named mySet containing elements of a specific type.
We use the size property to get the number of elements in the set.
If the size is greater than zero, then the set is not empty; otherwise, it is empty.

JavaScript Program

// Define non-empty set
const mySet = new Set(['apple', 'banana', 'orange']);

// Check if set is not empty using size property
if (mySet.size > 0) {
    console.log('Set is not empty');
} else {
    console.log('Set is empty');
}

Output

Set is not empty

2 Check if Set is Not Empty Using size() Method

In this example,

We define a non-empty set named mySet containing elements of a specific type.
We use the size() method to get the number of elements in the set.
If the size is greater than zero, then the set is not empty; otherwise, it is empty.

JavaScript Program

// Define non-empty set
const mySet = new Set(['apple', 'banana', 'orange']);

// Check if set is not empty using size() method
if (mySet.size() > 0) {
    console.log('Set is not empty');
} else {
    console.log('Set is empty');
}

Output

Set is not empty

Summary

In this tutorial, we learned How to check if a Set is Not Empty in JavaScript language with well detailed examples.

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How to check if a Set is Not Empty in JavaScript

How to check if a Set is Not Empty in JavaScript ?

Answer

✐ Examples

1 Check if Set is Not Empty Using size Property

JavaScript Program

Output

2 Check if Set is Not Empty Using size() Method

JavaScript Program

Output

Summary

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