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prefer-first

added in: 1.6.0
style
🛠
Free+

Warns when the first element of an Iterable or a List is accessed by list[0] or iterable.elementAt(0) instead of calling .first.

Example​

❌ Bad:

const array = [1, 2, 3, 4, 5, 6, 7, 8, 9];

array.elementAt(0); // LINT: Prefer '.first' instead of accessing the element at zero index.
array[0]; // LINT: Prefer '.first' instead of accessing the element at zero index.

✅ Good:

const array = [1, 2, 3, 4, 5, 6, 7, 8, 9];

array.first;