Filter
Iterates `source`, evaluates `predicate` per element with `loopVar` bound, and returns the subset of elements for which the predicate yields a truthy value. Use to narrow a set before aggregating.
- Subclass Of
Iterating Expression
Iterates `source`, evaluates `predicate` per element with `loopVar` bound, and returns the subset of elements for which the predicate yields a truthy value. Use to narrow a set before aggregating.
Iterating Expression