I chose Rust syntax because it allows both chaining and using methods as functions, but avoided Rust-specific features. In addition to `collect` this example is

I chose Rust syntax because it allows both chaining and using methods as functions, but avoided Rust-specific features. In addition to `collect` this example is missing `.into_iter()` that both examples would need: I interpreted `apples` as an iterator instead. Otherwise the first example would be clearer with a for loop.