[][src]Struct tera::Map

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

Represents a JSON key/value type.

Methods

impl Map<String, Value>
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Makes a new empty Map.

Makes a new empty Map with the given initial capacity.

Clears the map, removing all values.

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.

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.

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.

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.

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.

Gets the given key's corresponding entry in the map for in-place manipulation.

Returns the number of elements in the map.

Returns true if the map contains no elements.

Gets an iterator over the entries of the map.

Gets a mutable iterator over the entries of the map.

Gets an iterator over the keys of the map.

Gets an iterator over the values of the map.

Gets an iterator over mutable values of the map.

Trait Implementations

impl Clone for Map<String, Value>
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Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl<'de> Deserialize<'de> for Map<String, Value>
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Deserialize this value from the given Serde deserializer. Read more

impl Serialize for Map<String, Value>
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Serialize this value into the given Serde serializer. Read more

impl Extend<(String, Value)> for Map<String, Value>
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Extends a collection with the contents of an iterator. Read more

impl Default for Map<String, Value>
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Returns the "default value" for a type. Read more

impl<'a, Q> Index<&'a Q> for Map<String, Value> where
    Q: Ord + Eq + Hash + ?Sized,
    String: Borrow<Q>, 
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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,
}

The returned type after indexing.

Performs the indexing (container[index]) operation.

impl IntoIterator for Map<String, Value>
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The type of the elements being iterated over.

Which kind of iterator are we turning this into?

Creates an iterator from a value. Read more

impl<'a> IntoIterator for &'a Map<String, Value>
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The type of the elements being iterated over.

Which kind of iterator are we turning this into?

Creates an iterator from a value. Read more

impl<'a> IntoIterator for &'a mut Map<String, Value>
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The type of the elements being iterated over.

Which kind of iterator are we turning this into?

Creates an iterator from a value. Read more

impl Debug for Map<String, Value>
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Formats the value using the given formatter. Read more

impl FromIterator<(String, Value)> for Map<String, Value>
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Creates a value from an iterator. Read more

impl<'a, Q> IndexMut<&'a Q> for Map<String, Value> where
    Q: Ord + Eq + Hash + ?Sized,
    String: Borrow<Q>, 
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Mutably access an element of this map. Panics if the given key is not present in the map.

map["key"] = json!("value");

Performs the mutable indexing (container[index]) operation.

impl From<Map<String, Value>> for Value
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Convert map (with string keys) to Value

Examples

use serde_json::{Map, Value};

let mut m = Map::new();
m.insert("Lorem".to_string(), "ipsum".into());
let x: Value = m.into();

impl PartialEq<Map<String, Value>> for Map<String, Value>
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This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

Auto Trait Implementations

impl<K, V> Send for Map<K, V> where
    K: Send,
    V: Send

impl<K, V> Sync for Map<K, V> where
    K: Sync,
    V: Sync

Blanket Implementations

impl<T, U> Into for T where
    U: From<T>, 
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Performs the conversion.

impl<T> ToOwned for T where
    T: Clone
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Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> From for T
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Performs the conversion.

impl<I> IntoIterator for I where
    I: Iterator
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The type of the elements being iterated over.

Which kind of iterator are we turning this into?

Creates an iterator from a value. Read more

impl<T, U> TryFrom for T where
    T: From<U>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> Borrow for T where
    T: ?Sized
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Immutably borrows from an owned value. Read more

impl<T> BorrowMut for T where
    T: ?Sized
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Mutably borrows from an owned value. Read more

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> Any for T where
    T: 'static + ?Sized
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🔬 This is a nightly-only experimental API. (get_type_id)

this method will likely be replaced by an associated static

Gets the TypeId of self. Read more

impl<T> DeserializeOwned for T where
    T: Deserialize<'de>, 
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