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Clarify Extend behaviour wrt existing keys

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This commit is contained in:
Sebastian Hahn 2016-12-27 14:28:57 +01:00
parent 9351c2c8e7
commit 2467a41bce
1 changed files with 2 additions and 1 deletions
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3
src/libcore/iter/traits.rs
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@ -260,7 +260,8 @@ 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.
/// to extend a collection by including the contents of that iterator. When
/// extending a collection with an already existing key, that entry is updated.
///
/// # Examples
///