JavaScript Some
some() checks whether AT LEAST ONE element passes the test and returns a boolean. It stops at the first match, so it can be much faster than filtering the whole array.
Syntax
arr.some((x) => x > 2)Examples
| Input | Arguments | Output |
|---|---|---|
| [1, 2, 3] | x => x > 2 | true |
| [1, 2, 3] | x => x > 10 | false |
When to use it
- Check if a list contains at least one invalid or special entry.
- Guard logic: "is there any item on sale?"
Gotchas
- On an empty array some() always returns false.
- It returns a boolean, not the matching element. Use find() for the element itself.
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