no-useless-length-check

Disallow length checks duplicated by the guarded array operation

every returns true for an empty array, and some returns false.
Separate length guards duplicate these results.
Instead, you SHOULD use the array operation directly.

- Category: suspicious
- Level: warning
- Fix: automatic
- Scope: module

Reported

function allPositive(values: int32[]): boolean {
    return values.length === 0 || values.every((value) => value > 0);
}
Accepted

function allPositive(values: int32[]): boolean {
    return values.every((value) => value > 0);
}
Prior art

- eslint-plugin-unicorn · no-useless-length-check

language/linter/src/rules/suspicious/nouselesslengthcheck.rs:8