[−][src]Struct serde_json::map::Map
Represents a JSON key/value type.
Methods
impl Map<String, Value>
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pub fn new() -> Self
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Makes a new empty Map.
pub fn with_capacity(capacity: usize) -> Self
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Makes a new empty Map with the given initial capacity.
pub fn clear(&mut self)
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Clears the map, removing all values.
pub fn get<Q: ?Sized>(&self, key: &Q) -> Option<&Value> where
String: Borrow<Q>,
Q: Ord + Eq + Hash,
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String: Borrow<Q>,
Q: Ord + Eq + Hash,
Returns a reference to the value corresponding to the key.
The key may be any borrowed form of the map's key type, but the ordering on the borrowed form must match the ordering on the key type.
pub fn contains_key<Q: ?Sized>(&self, key: &Q) -> bool where
String: Borrow<Q>,
Q: Ord + Eq + Hash,
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String: Borrow<Q>,
Q: Ord + Eq + Hash,
Returns true if the map contains a value for the specified key.
The key may be any borrowed form of the map's key type, but the ordering on the borrowed form must match the ordering on the key type.
pub fn get_mut<Q: ?Sized>(&mut self, key: &Q) -> Option<&mut Value> where
String: Borrow<Q>,
Q: Ord + Eq + Hash,
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String: Borrow<Q>,
Q: Ord + Eq + Hash,
Returns a mutable reference to the value corresponding to the key.
The key may be any borrowed form of the map's key type, but the ordering on the borrowed form must match the ordering on the key type.
pub fn insert(&mut self, k: String, v: Value) -> Option<Value>
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Inserts a key-value pair into the map.
If the map did not have this key present, None
is returned.
If the map did have this key present, the value is updated, and the old value is returned.
pub fn remove<Q: ?Sized>(&mut self, key: &Q) -> Option<Value> where
String: Borrow<Q>,
Q: Ord + Eq + Hash,
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String: Borrow<Q>,
Q: Ord + Eq + Hash,
Removes a key from the map, returning the value at the key if the key was previously in the map.
The key may be any borrowed form of the map's key type, but the ordering on the borrowed form must match the ordering on the key type.
pub fn entry<S>(&mut self, key: S) -> Entry where
S: Into<String>,
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S: Into<String>,
Gets the given key's corresponding entry in the map for in-place manipulation.
pub fn len(&self) -> usize
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Returns the number of elements in the map.
pub fn is_empty(&self) -> bool
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Returns true if the map contains no elements.
ⓘImportant traits for Iter<'a>pub fn iter(&self) -> Iter
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Gets an iterator over the entries of the map.
ⓘImportant traits for IterMut<'a>pub fn iter_mut(&mut self) -> IterMut
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Gets a mutable iterator over the entries of the map.
ⓘImportant traits for Keys<'a>pub fn keys(&self) -> Keys
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Gets an iterator over the keys of the map.
ⓘImportant traits for Values<'a>pub fn values(&self) -> Values
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Gets an iterator over the values of the map.
ⓘImportant traits for ValuesMut<'a>pub fn values_mut(&mut self) -> ValuesMut
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Gets an iterator over mutable values of the map.
Trait Implementations
impl Default for Map<String, Value>
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impl Clone for Map<String, Value>
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impl Extend<(String, Value)> for Map<String, Value>
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impl PartialEq<Map<String, Value>> for Map<String, Value>
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impl<'a> IntoIterator for &'a Map<String, Value>
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impl<'a> IntoIterator for &'a mut Map<String, Value>
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impl IntoIterator for Map<String, Value>
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impl From<Map<String, Value>> for Value
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impl<'a, Q: ?Sized> Index<&'a Q> for Map<String, Value> where
String: Borrow<Q>,
Q: Ord + Eq + Hash,
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String: Borrow<Q>,
Q: Ord + Eq + Hash,
impl<'a, Q: ?Sized> IndexMut<&'a Q> for Map<String, Value> where
String: Borrow<Q>,
Q: Ord + Eq + Hash,
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String: Borrow<Q>,
Q: Ord + Eq + Hash,
impl Debug for Map<String, Value>
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impl FromIterator<(String, Value)> for Map<String, Value>
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impl Serialize for Map<String, Value>
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impl<'de> Deserialize<'de> for Map<String, Value>
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Auto Trait Implementations
impl<K, V> Send for Map<K, V> where
K: Send,
V: Send,
K: Send,
V: Send,
impl<K, V> Unpin for Map<K, V> where
K: Unpin,
V: Unpin,
K: Unpin,
V: Unpin,
impl<K, V> Sync for Map<K, V> where
K: Sync,
V: Sync,
K: Sync,
V: Sync,
impl<K, V> UnwindSafe for Map<K, V> where
K: RefUnwindSafe + UnwindSafe,
V: RefUnwindSafe + UnwindSafe,
K: RefUnwindSafe + UnwindSafe,
V: RefUnwindSafe + UnwindSafe,
impl<K, V> RefUnwindSafe for Map<K, V> where
K: RefUnwindSafe,
V: RefUnwindSafe,
K: RefUnwindSafe,
V: RefUnwindSafe,
Blanket Implementations
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<I> IntoIterator for I where
I: Iterator,
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I: Iterator,
impl<T> From<T> for T
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> DeserializeOwned for T where
T: Deserialize<'de>,
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T: Deserialize<'de>,