Struct stdcli::prelude::serde_json::value::Map

pub struct Map<K, V> { /* fields omitted */ }

Represents a JSON key/value type.

Methods

impl Map<String, Value>

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>, 

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>, 

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>, 

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>, 

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>, 

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 Serialize for Map<String, Value>

fn serialize<S>(
    &self,
    serializer: S
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where
    S: Serializer, 

Serialize this value into the given Serde serializer.

impl Clone for Map<String, Value>

fn clone(&self) -> Map<String, Value>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl PartialEq<Map<String, Value>> for Map<String, Value>

fn eq(&self, other: &Map<String, Value>) -> bool

impl Debug for Map<String, Value>

fn fmt(&self, formatter: &mut Formatter) -> Result<(), Error>

Formats the value using the given formatter.

impl Extend<(String, Value)> for Map<String, Value>

fn extend<T>(&mut self, iter: T) where
    T: IntoIterator<Item = (String, Value)>, 

Extends a collection with the contents of an iterator.

impl Default for Map<String, Value>

fn default() -> Map<String, Value>

Returns the "default value" for a type.

impl<'a, Q> Index<&'a Q> for Map<String, Value> where
    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,
}

type Output = Value

fn index(&self, index: &Q) -> &Value

impl<'a> IntoIterator for &'a Map<String, Value>

type Item = (&'a String, &'a Value)

The type of the elements being iterated over.

type IntoIter = Iter<'a>

Which kind of iterator are we turning this into?

fn into_iter(self) -> <&'a Map<String, Value> as IntoIterator>::IntoIter

Creates an iterator from a value.

impl IntoIterator for Map<String, Value>

type Item = (String, Value)

The type of the elements being iterated over.

type IntoIter = IntoIter

Which kind of iterator are we turning this into?

fn into_iter(self) -> <Map<String, Value> as IntoIterator>::IntoIter

Creates an iterator from a value.

impl<'a> IntoIterator for &'a mut Map<String, Value>

type Item = (&'a String, &'a mut Value)

The type of the elements being iterated over.

type IntoIter = IterMut<'a>

Which kind of iterator are we turning this into?

fn into_iter(self) -> <&'a mut Map<String, Value> as IntoIterator>::IntoIter

Creates an iterator from a value.

impl<'de> Deserialize<'de> for Map<String, Value>

fn deserialize<D>(
    deserializer: D
) -> Result<Map<String, Value>, <D as Deserializer<'de>>::Error> where
    D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl FromIterator<(String, Value)> for Map<String, Value>

fn from_iter<T>(iter: T) -> Map<String, Value> where
    T: IntoIterator<Item = (String, Value)>, 

Creates a value from an iterator.

impl<'a, Q> IndexMut<&'a Q> for Map<String, Value> where
    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");

fn index_mut(&mut self, index: &Q) -> &mut Value