Struct extendr_api::prelude::Slice
source · pub struct Slice {
pub start: isize,
pub end: Option<isize>,
pub step: isize,
}
Expand description
A slice (range with step size).
end
is an exclusive index. Negative start
or end
indexes are counted
from the back of the axis. If end
is None
, the slice extends to the end
of the axis.
See also the s![]
macro.
§Examples
Slice::new(0, None, 1)
is the full range of an axis. It can also be
created with Slice::from(..)
. The Python equivalent is [:]
.
Slice::new(a, b, 2)
is every second element from a
until b
. It can
also be created with Slice::from(a..b).step_by(2)
. The Python equivalent
is [a:b:2]
.
Slice::new(a, None, -1)
is every element, from a
until the end, in
reverse order. It can also be created with Slice::from(a..).step_by(-1)
.
The Python equivalent is [a::-1]
.
Fields§
§start: isize
start index; negative are counted from the back of the axis
end: Option<isize>
end index; negative are counted from the back of the axis; when not present the default is the full length of the axis.
step: isize
step size in elements; the default is 1, for every element.
Implementations§
source§impl Slice
impl Slice
sourcepub fn new(start: isize, end: Option<isize>, step: isize) -> Slice
pub fn new(start: isize, end: Option<isize>, step: isize) -> Slice
Create a new Slice
with the given extents.
See also the From
impls, converting from ranges; for example
Slice::from(i..)
or Slice::from(j..k)
.
step
must be nonzero.
(This method checks with a debug assertion that step
is not zero.)
Trait Implementations§
source§impl From<Slice> for SliceInfoElem
impl From<Slice> for SliceInfoElem
source§fn from(s: Slice) -> SliceInfoElem
fn from(s: Slice) -> SliceInfoElem
impl Copy for Slice
impl Eq for Slice
impl StructuralPartialEq for Slice
Auto Trait Implementations§
impl Freeze for Slice
impl RefUnwindSafe for Slice
impl Send for Slice
impl Sync for Slice
impl Unpin for Slice
impl UnwindSafe for Slice
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more