Trait groupable::Groupable
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[src]
pub trait Groupable<K, V> { fn group<B: FromKeyedIterator<K, V>>(&mut self) -> B; }
Conversion from an Iterator
of pairs.
Required Methods
fn group<B: FromKeyedIterator<K, V>>(&mut self) -> B
Loops through the entire iterator, grouping all keys into a container
implementing FromKeyedIterator
with a container of values per key.
The values will be aggregated per key into a container implementing
Extend
for the value type.
Example
use std::collections::HashMap; use groupable::Groupable; let evens = (0..10).map(|i| (i % 2 == 0, i)) .group::<HashMap<bool, Vec<usize>>>(); assert_eq!(evens[&true], [0, 2, 4, 6, 8]); assert_eq!(evens[&false], [1, 3, 5, 7, 9]);