prefer-for-of

Prefer for-of when a loop only indexes one array

A complete index loop whose counter only selects array elements maintains an index it never uses directly.
Instead, you SHOULD iterate over the array values with a for-of loop.

- Category: style
- Level: warning
- Fix: none
- Scope: module

Reported

function copy(values: int32[], output: int32[]): void {
    for (let index: isize = 0; index < values.length; index++) {
        output.push(values[index]);
    }
}
Accepted

function copy(values: int32[], output: int32[]): void {
    for (const value of values) {
        output.push(value);
    }
}
Prior art

- typescript-eslint · prefer-for-of

language/linter/src/rules/style/preferforof.rs:7