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Rollup merge of #46737 - tshepang:better, r=steveklabnik

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doc: a better example

Closes #46734
This commit is contained in:
Steve Klabnik 2017-12-15 09:27:03 -05:00 committed by GitHub
commit b98de5d0ac
1 changed files with 7 additions and 10 deletions
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17
src/libcore/iter/iterator.rs
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@ -621,27 +621,24 @@ pub trait Iterator {
/// Basic usage:
///
/// ```
/// let a = ["1", "2", "lol"];
/// let a = ["1", "lol", "3", "NaN", "5"];
///
/// let mut iter = a.iter().filter_map(|s| s.parse().ok());
///
/// assert_eq!(iter.next(), Some(1));
/// assert_eq!(iter.next(), Some(2));
/// assert_eq!(iter.next(), Some(3));
/// assert_eq!(iter.next(), Some(5));
/// assert_eq!(iter.next(), None);
/// ```
///
/// Here's the same example, but with [`filter`] and [`map`]:
///
/// ```
/// let a = ["1", "2", "lol"];
///
/// let mut iter = a.iter()
/// .map(|s| s.parse())
/// .filter(|s| s.is_ok())
/// .map(|s| s.unwrap());
///
/// let a = ["1", "lol", "3", "NaN", "5"];
/// let mut iter = a.iter().map(|s| s.parse()).filter(|s| s.is_ok()).map(|s| s.unwrap());
/// assert_eq!(iter.next(), Some(1));
/// assert_eq!(iter.next(), Some(2));
/// assert_eq!(iter.next(), Some(3));
/// assert_eq!(iter.next(), Some(5));
/// assert_eq!(iter.next(), None);
/// ```
///