core_slice::SliceExt::len(self)
}
- /// Returns true if the slice has a length of 0.
+ /// Returns `true` if the slice has a length of 0.
///
/// # Example
///
///
/// ```
/// let x = &mut [1, 2, 4];
- /// {
- /// let iterator = x.iter_mut();
- ///
- /// for elem in iterator {
- /// *elem += 2;
- /// }
+ /// for elem in x.iter_mut() {
+ /// *elem += 2;
/// }
/// assert_eq!(x, &[3, 4, 6]);
/// ```
core_slice::SliceExt::rsplitn_mut(self, n, pred)
}
- /// Returns true if the slice contains an element with the given value.
+ /// Returns `true` if the slice contains an element with the given value.
///
/// # Examples
///
core_slice::SliceExt::contains(self, x)
}
- /// Returns true if `needle` is a prefix of the slice.
+ /// Returns `true` if `needle` is a prefix of the slice.
///
/// # Examples
///
/// assert!(!v.starts_with(&[50]));
/// assert!(!v.starts_with(&[10, 50]));
/// ```
+ ///
+ /// Always returns `true` if `needle` is an empty slice:
+ ///
+ /// ```
+ /// let v = &[10, 40, 30];
+ /// assert!(v.starts_with(&[]));
+ /// let v: &[u8] = &[];
+ /// assert!(v.starts_with(&[]));
+ /// ```
#[stable(feature = "rust1", since = "1.0.0")]
pub fn starts_with(&self, needle: &[T]) -> bool
where T: PartialEq
core_slice::SliceExt::starts_with(self, needle)
}
- /// Returns true if `needle` is a suffix of the slice.
+ /// Returns `true` if `needle` is a suffix of the slice.
///
/// # Examples
///
/// assert!(!v.ends_with(&[50]));
/// assert!(!v.ends_with(&[50, 30]));
/// ```
+ ///
+ /// Always returns `true` if `needle` is an empty slice:
+ ///
+ /// ```
+ /// let v = &[10, 40, 30];
+ /// assert!(v.ends_with(&[]));
+ /// let v: &[u8] = &[];
+ /// assert!(v.ends_with(&[]));
+ /// ```
#[stable(feature = "rust1", since = "1.0.0")]
pub fn ends_with(&self, needle: &[T]) -> bool
where T: PartialEq