Trait polars_core::utils::CustomIterTools

pub trait CustomIterTools: Iterator {
    // Provided methods
    fn fold_first_<F>(self, f: F) -> Option<Self::Item>
       where Self: Sized,
             F: FnMut(Self::Item, Self::Item) -> Self::Item { ... }
    unsafe fn trust_my_length(
        self,
        length: usize
    ) -> TrustMyLength<Self, Self::Item> 
       where Self: Sized { ... }
    fn collect_trusted<T>(self) -> T
       where T: FromTrustedLenIterator<Self::Item>,
             Self: Sized + TrustedLen { ... }
    fn collect_reversed<T>(self) -> T
       where T: FromIteratorReversed<Self::Item>,
             Self: Sized + TrustedLen { ... }
    fn all_equal(&mut self) -> bool
       where Self: Sized,
             Self::Item: PartialEq<Self::Item> { ... }
    fn fold_options<A, B, F>(&mut self, start: B, f: F) -> Option<B>
       where Self: Iterator<Item = Option<A>>,
             F: FnMut(B, A) -> B { ... }
}

Provided Methods

fn fold_first_<F>(self, f: F) -> Option<Self::Item>where Self: Sized, F: FnMut(Self::Item, Self::Item) -> Self::Item,

unsafe fn trust_my_length( self, length: usize ) -> TrustMyLength<Self, Self::Item> where Self: Sized,

Turn any iterator in a trusted length iterator

Safety

The given length must be correct.

fn collect_trusted<T>(self) -> Twhere T: FromTrustedLenIterator<Self::Item>, Self: Sized + TrustedLen,

fn collect_reversed<T>(self) -> Twhere T: FromIteratorReversed<Self::Item>, Self: Sized + TrustedLen,

fn all_equal(&mut self) -> boolwhere Self: Sized, Self::Item: PartialEq<Self::Item>,

fn fold_options<A, B, F>(&mut self, start: B, f: F) -> Option<B>where Self: Iterator<Item = Option<A>>, F: FnMut(B, A) -> B,

Implementors

impl<T> CustomIterTools for Twhere T: Iterator + ?Sized,