3 unstable releases
0.2.1 | Jan 2, 2022 |
---|---|
0.2.0 | Jun 14, 2021 |
0.1.0 | May 2, 2021 |
#2062 in Rust patterns
124 downloads per month
Used in 6 crates
(4 directly)
26KB
724 lines
iterator-ext: An extension to Rust's Iterator
trait.
Usage
The crate provides the IteratorExt
trait extends the capability of those types
that implements Iterator
. It provides try_filter()
, try_flatten()
and more fallible adaptors that are analogous to those of Iterator
.
The example demonstrates the usage of the adaptors. It accumulates the values from 0 to 9, and keeps only even outcomes. It raises error when the accumulation exceeds 10.
use iterator_ext::IteratorExt;
//!
let results: Vec<_> = (0..10)
.map(Ok)
.try_scan(0, |acc, val| {
*acc += val;
if *acc <= 10 {
Ok(Some(*acc))
} else {
Err("exceed limit")
}
})
.try_filter(|val| Ok(val % 2 == 0))
.collect();
//!
assert_eq!(results, vec![Ok(0), Ok(6), Ok(10), Err("exceed limit")]);
License
MIT license. See LICENSE.txt file.
lib.rs
:
An extension to Iterator trait.
The IteratorExt
trait extends the capability of those types
that implements Iterator
. It provides try_filter()
, try_flatten()
and more fallible adaptors that are analogous to those of Iterator
.
The example demonstrates the usage of the adaptors. It accumulates the values from 0 to 9, and keeps only even outcomes. It raises error when the accumulation exceeds 10.
use iterator_ext::IteratorExt;
let results: Vec<_> = (0..10)
.map(Ok)
.try_scan(0, |acc, val| {
*acc += val;
if *acc <= 10 {
Ok(Some(*acc))
} else {
Err("exceed limit")
}
})
.try_filter(|val| Ok(val % 2 == 0))
.collect();
assert_eq!(results, vec![Ok(0), Ok(6), Ok(10), Err("exceed limit")]);