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Add a get_mut method to accompany the get method. #6867

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Jun 2, 2013
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Add a get_mut method to accompany the get method. #6867

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9 changes: 9 additions & 0 deletions src/libstd/hashmap.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -501,6 +501,15 @@ impl<K: Hash + Eq, V> HashMap<K, V> {
}
}

/// Retrieves a (mutable) value for the given key, failing if the key
/// is not present.
pub fn get_mut<'a>(&'a mut self, k: &K) -> &'a mut V {
match self.find_mut(k) {
Some(v) => v,
None => fail!("No entry found for key: %?", k),
}
}

/// Return true if the map contains a value for the specified key,
/// using equivalence
pub fn contains_key_equiv<Q:Hash + Equiv<K>>(&self, key: &Q) -> bool {
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