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Rm hiding feature gate & add 1 more example

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Update order docs for `map`
This commit is contained in:
kadmin 2020-08-08 23:20:28 +00:00
parent 54b821ebc0
commit 412417d807
1 changed files with 7 additions and 3 deletions
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10
library/core/src/array/mod.rs
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@ -368,13 +368,13 @@ array_impl_default! {32, T T T T T T T T T T T T T T T T T T T T T T T T T T T T
#[cfg(not(bootstrap))]
#[lang = "array"]
impl<T, const N: usize> [T; N] {
/// Returns an array of the same size as `self`, with function `f` applied to each element.
/// The closure will be called on elements 0 up to but excluding N.
/// Returns an array of the same size as `self`, with function `f` applied to each element
/// in order.
///
/// # Examples
///
/// ```
/// # #![feature(array_map)]
/// #![feature(array_map)]
/// let x = [1, 2, 3];
/// let y = x.map(|v| v + 1);
/// assert_eq!(y, [2, 3, 4]);
@ -383,6 +383,10 @@ impl<T, const N: usize> [T; N] {
/// let mut temp = 0;
/// let y = x.map(|v| { temp += 1; v * temp });
/// assert_eq!(y, [1, 4, 9]);
///
/// let x = ["Ferris", "Bueller's", "Day", "Off"];
/// let y = x.map(|v| v.len());
/// assert_eq!(y, [6, 9, 3, 3]);
/// ```
#[unstable(feature = "array_map", issue = "75243")]
pub fn map<F, U>(self, mut f: F) -> [U; N]