Struct std::cmp::Reverse 1.19.0
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pub struct Reverse<T>(pub T);
A helper struct for reverse ordering.
This struct is a helper to be used with functions like Vec::sort_by_key and
can be used to reverse order a part of a key.
Example usage:
use std::cmp::Reverse; let mut v = vec![1, 2, 3, 4, 5, 6]; v.sort_by_key(|&num| (num > 3, Reverse(num))); assert_eq!(v, vec![3, 2, 1, 6, 5, 4]);Run
Trait Implementations
impl<T> PartialEq<Reverse<T>> for Reverse<T> where
T: PartialEq<T>, [src]
T: PartialEq<T>,
fn eq(&self, __arg_0: &Reverse<T>) -> bool[src]
This method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, __arg_0: &Reverse<T>) -> bool[src]
This method tests for !=.
impl<T> Ord for Reverse<T> where
T: Ord, [src]
T: Ord,
fn cmp(&self, other: &Reverse<T>) -> Ordering[src]
This method returns an Ordering between self and other. Read more
fn max(self, other: Self) -> Self1.21.0[src]
Compares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self1.21.0[src]
Compares and returns the minimum of two values. Read more
impl<T> PartialOrd<Reverse<T>> for Reverse<T> where
T: PartialOrd<T>, [src]
T: PartialOrd<T>,
fn partial_cmp(&self, other: &Reverse<T>) -> Option<Ordering>[src]
This method returns an ordering between self and other values if one exists. Read more
fn lt(&self, other: &Reverse<T>) -> bool[src]
This method tests less than (for self and other) and is used by the < operator. Read more
fn le(&self, other: &Reverse<T>) -> bool[src]
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
fn ge(&self, other: &Reverse<T>) -> bool[src]
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
fn gt(&self, other: &Reverse<T>) -> bool[src]
This method tests greater than (for self and other) and is used by the > operator. Read more
impl<T> Eq for Reverse<T> where
T: Eq, [src]
T: Eq,
impl<T> Debug for Reverse<T> where
T: Debug, [src]
T: Debug,