How to check if a Set is Empty in TypeScript

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How to check if a Set is Empty in TypeScript ?

Answer

To check if a Set is empty in TypeScript, you can use the size property of the Set object.

✐ Examples

1 Check if Set is Empty

In this example,

We declare a Set variable named set and initialize it with some elements, or an empty Set if there are no elements.
We use the size property of the Set set to determine the number of elements it contains.
If the size of the Set is 0, it means the Set is empty; otherwise, it has elements.
We print the result to the standard output to indicate whether the Set is empty or not.

TypeScript Program

let set: Set<string> = new Set(); // Or new Set(['a', 'b', 'c']) for a non-empty Set
let isEmpty: boolean = set.size === 0;
if (isEmpty) {
    console.log('The Set is empty');
} else {
    console.log('The Set is not empty');
}

Output

The Set is empty

2 Check if Empty Set is Empty

In this example,

We declare an empty Set variable named emptySet.
We use the size property of the Set emptySet to determine the number of elements it contains.
Since the size of the Set is 0, it means the Set is empty.
We print the result to the standard output to indicate that the Set is indeed empty.

TypeScript Program

let emptySet: Set<string> = new Set();
let isEmpty: boolean = emptySet.size === 0;
if (isEmpty) {
    console.log('The Set is empty');
} else {
    console.log('The Set is not empty');
}

Output

The Set is empty

Summary

In this tutorial, we learned How to check if a Set is Empty in TypeScript language with well detailed examples.

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How to check if a Set is Empty in TypeScript

How to check if a Set is Empty in TypeScript ?

Answer

✐ Examples

1 Check if Set is Empty

TypeScript Program

Output

2 Check if Empty Set is Empty

TypeScript Program

Output

Summary

More TypeScript Sets Tutorials