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Map

Struct Map 

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pub struct Map(/* private fields */);
Expand description

A map: entries in file order, keys unique.

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impl Map

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pub fn new() -> Self

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pub fn with_capacity(n: usize) -> Self

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pub fn get(&self, key: &str) -> Option<&Value>

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pub fn get_mut(&mut self, key: &str) -> Option<&mut Value>

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pub fn index_of(&self, key: &str) -> Option<usize>

The position of key among the entries.

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pub fn insert(&mut self, key: impl Into<String>, value: Value) -> Option<Value>

Sets key, in place if it’s there, else at the end; returns the old value.

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pub fn remove(&mut self, key: &str) -> Option<Value>

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pub fn len(&self) -> usize

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pub fn is_empty(&self) -> bool

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pub fn iter(&self) -> impl ExactSizeIterator<Item = (&str, &Value)>

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pub fn keys(&self) -> impl ExactSizeIterator<Item = &str>

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pub fn retain(&mut self, keep: impl FnMut(&str, &Value) -> bool)

Trait Implementations§

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impl Clone for Map

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Map

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for Map

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl From<Map> for Value

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fn from(m: Map) -> Self

Converts to this type from the input type.
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impl<K: Into<String>> FromIterator<(K, Value)> for Map

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fn from_iter<I: IntoIterator<Item = (K, Value)>>(iter: I) -> Self

Creates a value from an iterator. Read more
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impl IntoIterator for Map

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type Item = (String, Value)

The type of the elements being iterated over.
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type IntoIter = IntoIter<(String, Value)>

Which kind of iterator are we turning this into?
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fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more
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impl PartialEq for Map

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fn eq(&self, other: &Self) -> bool

Equality operator ==. Read more
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fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for Map

Auto Trait Implementations§

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impl Freeze for Map

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impl RefUnwindSafe for Map

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impl Send for Map

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impl Sync for Map

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impl Unpin for Map

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impl UnsafeUnpin for Map

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impl UnwindSafe for Map

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

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

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = !

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, !>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.