pub fn once<T>(value: T) -> Once<T>Expand description
Creates a stream that emits an element exactly once.
The returned stream is immediately ready and emits the provided value once.
ยงExamples
use tokio_stream::{self as stream, StreamExt};
// one is the loneliest number
let mut one = stream::once(1);
assert_eq!(Some(1), one.next().await);
// just one, that's all we get
assert_eq!(None, one.next().await);