Sometimes, we want to filter a JavaScript Map.
In this article, we’ll look at how to filter a JavaScript Map.
How to filter a JavaScript Map?
To filter a JavaScript Map, we convert it to an array.
For instance, we write
const map0 = new Map([
["a", 1],
["b", 2],
["c", 3],
]);
const map1 = new Map([...map0].filter(([k, v]) => v < 3));
console.info([...map1]);
to create a map with the Map constructor.
Then we convert it to an array with the spread operator.
And then we call filter with a function that checks if value v is less than 3.
We use the returned array to create another Map.
Conclusion
To filter a JavaScript Map, we convert it to an array.
