Crate peek_nth [−] [src]
An iterator adapter that allows you to efficiently peek the nth item of an iterator.
Itermediate values are memoized and heap allocations are avoided when possible.
Usage
extern crate peek_nth; use peek_nth::IteratorExt; fn main() { let mut iter = "Hello, world!".chars().peekable_nth(); assert_eq!(iter.peek_nth(4), Some(&'o')); assert_eq!(iter.peek_nth(3), Some(&'l')); assert_eq!(iter.peek_nth(2), Some(&'l')); assert_eq!(iter.peek_nth(1), Some(&'e')); assert_eq!(iter.peek_nth(0), Some(&'H')); assert_eq!(iter.peek_nth(7), Some(&'w')); assert_eq!(iter.collect::<String>(), "Hello, world!"); }
Structs
PeekableNth |
An iterator with a peek_nth() method that returns an optional reference to the nth element. |
Traits
IteratorExt |
Adds a peekable_nth() method to types that implement |