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For Extend, document collections allowing duplicate keys

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Sebastian Hahn 2017-01-05 05:19:54 +01:00
parent 2467a41bce
commit 74b2587606
1 changed files with 3 additions and 1 deletions
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4
src/libcore/iter/traits.rs
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@ -261,7 +261,9 @@ impl<I: Iterator> IntoIterator for I {
/// Iterators produce a series of values, and collections can also be thought
/// of as a series of values. The `Extend` trait bridges this gap, allowing you
/// to extend a collection by including the contents of that iterator. When
/// extending a collection with an already existing key, that entry is updated.
/// extending a collection with an already existing key, that entry is updated
/// or, in the case of collections that permit multiple entries with equal
/// keys, that entry is inserted.
///
/// # Examples
///