method iter.inspect

Calls f on a copy of every element as it passes (debugging aid).

Example:

oxl✓ checked in CI

fn main() io {
  let sum = [1, 2, 3].iter().inspect(x => print("saw {x}")).map(x => x * 2).collect()
  print("{sum}")
}

Output

saw 1
saw 2
saw 3
[2, 4, 6]

pub(api) move fn inspect<effect F>(f: fn(T) F escaping) -> iter<T>  F

Complexity. O(1) per element.

Since. 1.0.0-beta

Parameters

Name	Type
`f`	`fn(T) F escaping`

iter<T> F

none declared (pure unless the body says otherwise)

Defined in: std/core/iter.oxl:375