Struct serde_json::Map
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pub struct Map<K, V>(_);
Represents a key/value type.
Methods
impl Map<String, Value>[src]
fn new() -> Self
Makes a new empty Map.
fn with_capacity(capacity: usize) -> Self
Makes a new empty Map with the given initial capacity.
fn clear(&mut self)
Clears the map, removing all values.
fn get<Q: ?Sized>(&self, key: &Q) -> Option<&Value> where 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.
fn contains_key<Q: ?Sized>(&self, key: &Q) -> bool where 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.
fn get_mut<Q: ?Sized>(&mut self, key: &Q) -> Option<&mut Value> where 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.
fn insert(&mut self, k: String, v: Value) -> Option<Value>
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. The key is not updated, though; this matters for
types that can be == without being identical.
fn remove<Q: ?Sized>(&mut self, key: &Q) -> Option<Value> where 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.
fn len(&self) -> usize
Returns the number of elements in the map.
fn is_empty(&self) -> bool
Returns true if the map contains no elements.
fn iter(&self) -> MapIter
Gets an iterator over the entries of the map.
fn iter_mut(&mut self) -> MapIterMut
Gets a mutable iterator over the entries of the map.
fn keys(&self) -> MapKeys
Gets an iterator over the keys of the map.
fn values(&self) -> MapValues
Gets an iterator over the values of the map.
Trait Implementations
impl Default for Map<String, Value>[src]
impl Clone for Map<String, Value>[src]
fn clone(&self) -> Self
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)1.0.0
Performs copy-assignment from source. Read more
impl PartialEq for Map<String, Value>[src]
fn eq(&self, other: &Self) -> bool
This method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, other: &Rhs) -> bool1.0.0
This method tests for !=.
impl Debug for Map<String, Value>[src]
fn fmt(&self, formatter: &mut Formatter) -> Result<(), Error>
Formats the value using the given formatter.
impl Serialize for Map<String, Value>[src]
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: Serializer
Serialize this value into the given Serde serializer. Read more
impl Deserialize for Map<String, Value>[src]
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: Deserializer
Deserialize this value from the given Serde deserializer. Read more
impl<'a> IntoIterator for &'a Map<String, Value>[src]
type Item = (&'a String, &'a Value)
The type of the elements being iterated over.
type IntoIter = MapIter<'a>
Which kind of iterator are we turning this into?
fn into_iter(self) -> Self::IntoIter
Creates an iterator from a value. Read more
impl<'a> IntoIterator for &'a mut Map<String, Value>[src]
type Item = (&'a String, &'a mut Value)
The type of the elements being iterated over.
type IntoIter = MapIterMut<'a>
Which kind of iterator are we turning this into?
fn into_iter(self) -> Self::IntoIter
Creates an iterator from a value. Read more