Introduction
The entries() method in JavaScript, when used with a Set, It gives an iterator. This iterator produces pairs of values from the Set. Each pair is just the same value repeated twice. It looks like this: [value, value]. This is similar to how the entries() method works with a Map.
Syntax
entries() method represnts by the following syntax.
const mySet = new Set(['a', 'b', 'c']); const iterator = mySet.entries();
Parameters
The entries() method does not take any parameters.
Return
The entries() method returns a new Iterator object that contains an array of [Value,Value] for each element in the Set.
Example of Set entries() Method
In the following example, the entries() method returns an iterator, and the for…of loop iterates through the entries and prints them.
// Step 1: Create a new Set
const mySet = new Set(['apple', 'banana', 'cherry']);
// Step 2: Get an iterator from the entries() method
const iterator = mySet.entries();
// Step 3: Loop through the iterator and log the entries
for (let entry of iterator) {
console.log(entry);
}
Output
['apple', 'apple'] ['banana', 'banana'] ['cherry', 'cherry']
Conclusion
In this example, Three fruits are used to build a Set . By using the entries() method, we obtained an iterator that produced pairs of each value repeated twice. This simple loop then logged each pair to the console. This method is particularly useful when you need to process Set elements in a format consistent with other data structures like Map.