method iter.first
First element or none; later elements are not pulled.
Example:
fn main() io {
print("{[7, 8].iter().first()}")
}Output
7
pub(api) move fn first() -> T?Complexity. O(1): pulls one element.
Since. 1.0.0-beta
Returns
T?
Effects
none declared (pure unless the body says otherwise)
Defined in: std/core/iter.oxl:614