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Added doc about behavior of extend on HashMap #65048

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Oct 12, 2019
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Added doc about behavior of extend on HashMap #65048

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2 changes: 2 additions & 0 deletions src/libstd/collections/hash/map.rs
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Expand Up @@ -2362,6 +2362,8 @@ where
}
}

/// Inserts all new key-values from the iterator and replaces values with existing
/// keys with new values returned from the iterator.
#[stable(feature = "rust1", since = "1.0.0")]
impl<K, V, S> Extend<(K, V)> for HashMap<K, V, S>
where
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