Struct serde_mcf::Map
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pub struct Map<K, V> { /* fields omitted */ }
Represents a JSON key/value type.
Methods
impl Map<String, Value>
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fn new() -> Map<String, Value>
Makes a new empty Map.
fn with_capacity(capacity: usize) -> Map<String, Value>
Makes a new empty Map with the given initial capacity.
fn clear(&mut self)
Clears the map, removing all values.
fn get<Q>(&self, key: &Q) -> Option<&Value> where
Q: Ord + Eq + Hash + ?Sized,
String: Borrow<Q>,
Q: Ord + Eq + Hash + ?Sized,
String: Borrow<Q>,
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>(&self, key: &Q) -> bool where
Q: Ord + Eq + Hash + ?Sized,
String: Borrow<Q>,
Q: Ord + Eq + Hash + ?Sized,
String: Borrow<Q>,
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>(&mut self, key: &Q) -> Option<&mut Value> where
Q: Ord + Eq + Hash + ?Sized,
String: Borrow<Q>,
Q: Ord + Eq + Hash + ?Sized,
String: Borrow<Q>,
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>(&mut self, key: &Q) -> Option<Value> where
Q: Ord + Eq + Hash + ?Sized,
String: Borrow<Q>,
Q: Ord + Eq + Hash + ?Sized,
String: Borrow<Q>,
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 entry<S>(&mut self, key: S) -> Entry where
S: Into<String>,
S: Into<String>,
Gets the given key's corresponding entry in the map for in-place manipulation.
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) -> Iter
Gets an iterator over the entries of the map.
fn iter_mut(&mut self) -> IterMut
Gets a mutable iterator over the entries of the map.
fn keys(&self) -> Keys
Gets an iterator over the keys of the map.
fn values(&self) -> Values
Gets an iterator over the values of the map.
Trait Implementations
impl<'a> IntoIterator for &'a Map<String, Value>
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type Item = (&'a String, &'a Value)
type IntoIter = Iter<'a>
fn into_iter(self) -> <&'a Map<String, Value> as IntoIterator>::IntoIter
impl IntoIterator for Map<String, Value>
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type Item = (String, Value)
type IntoIter = IntoIter
fn into_iter(self) -> <Map<String, Value> as IntoIterator>::IntoIter
impl<'a> IntoIterator for &'a mut Map<String, Value>
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type Item = (&'a String, &'a mut Value)
type IntoIter = IterMut<'a>
fn into_iter(self) -> <&'a mut Map<String, Value> as IntoIterator>::IntoIter
impl<'a, Q> IndexMut<&'a Q> for Map<String, Value> where
Q: Ord + Eq + Hash + ?Sized,
String: Borrow<Q>,
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Q: Ord + Eq + Hash + ?Sized,
String: Borrow<Q>,
Mutably access an element of this map. Panics if the given key is not present in the map.
map["key"] = json!("value");
impl Debug for Map<String, Value>
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fn fmt(&self, formatter: &mut Formatter) -> Result<(), Error>
Formats the value using the given formatter.
impl FromIterator<(String, Value)> for Map<String, Value>
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impl Default for Map<String, Value>
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impl Serialize for Map<String, Value>
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fn serialize<S>(
&self,
serializer: S
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where
S: Serializer,
&self,
serializer: S
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where
S: Serializer,
Serialize this value into the given Serde serializer. Read more
impl Clone for Map<String, Value>
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impl<'de> Deserialize<'de> for Map<String, Value>
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fn deserialize<D>(
deserializer: D
) -> Result<Map<String, Value>, <D as Deserializer<'de>>::Error> where
D: Deserializer<'de>,
deserializer: D
) -> Result<Map<String, Value>, <D as Deserializer<'de>>::Error> where
D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
impl PartialEq<Map<String, Value>> for Map<String, Value>
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fn eq(&self, other: &Map<String, Value>) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, other: &Rhs) -> bool
1.0.0
This method tests for !=
.
impl Extend<(String, Value)> for Map<String, Value>
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impl<'a, Q> Index<&'a Q> for Map<String, Value> where
Q: Ord + Eq + Hash + ?Sized,
String: Borrow<Q>,
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Q: Ord + Eq + Hash + ?Sized,
String: Borrow<Q>,
Access an element of this map. Panics if the given key is not present in the map.
match *val { Value::String(ref s) => Some(s.as_str()), Value::Array(ref arr) => arr[0].as_str(), Value::Object(ref map) => map["type"].as_str(), _ => None, }