[−][src]Struct js_sys::Map
Methods
impl Map
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impl Map
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pub fn delete(&self, key: &JsValue) -> bool
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The delete() method removes the specified element from a Map object.
impl Map
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pub fn for_each(&self, callback: &mut dyn FnMut(JsValue, JsValue))
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The forEach() method executes a provided function once per each key/value pair in the Map object, in insertion order.
impl Map
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pub fn get(&self, key: &JsValue) -> JsValue
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The get() method returns a specified element from a Map object.
impl Map
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pub fn has(&self, key: &JsValue) -> bool
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The has() method returns a boolean indicating whether an element with the specified key exists or not.
impl Map
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pub fn new() -> Map
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The Map object holds key-value pairs. Any value (both objects and primitive values) maybe used as either a key or a value.
impl Map
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pub fn set(&self, key: &JsValue, value: &JsValue) -> Map
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The set() method adds or updates an element with a specified key and value to a Map object.
impl Map
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pub fn size(&self) -> u32
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The value of size is an integer representing how many entries the Map object has. A set accessor function for size is undefined; you can not change this property.
impl Map
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pub fn entries(&self) -> Iterator
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The entries() method returns a new Iterator object that contains the [key, value] pairs for each element in the Map object in insertion order.
impl Map
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pub fn keys(&self) -> Iterator
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The keys() method returns a new Iterator object that contains the keys for each element in the Map object in insertion order.
impl Map
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pub fn values(&self) -> Iterator
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The values() method returns a new Iterator object that contains the values for each element in the Map object in insertion order.
Methods from Deref<Target = Object>
pub fn constructor(&self) -> Function
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The constructor property returns a reference to the Object constructor function that created the instance object.
pub fn has_own_property(&self, property: &JsValue) -> bool
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The hasOwnProperty()
method returns a boolean indicating whether the
object has the specified property as its own property (as opposed to
inheriting it).
pub fn is_prototype_of(&self, value: &JsValue) -> bool
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The isPrototypeOf()
method checks if an object exists in another
object's prototype chain.
pub fn property_is_enumerable(&self, property: &JsValue) -> bool
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The propertyIsEnumerable()
method returns a Boolean indicating
whether the specified property is enumerable.
pub fn to_locale_string(&self) -> JsString
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The toLocaleString()
method returns a string representing the object.
This method is meant to be overridden by derived objects for
locale-specific purposes.
pub fn to_string(&self) -> JsString
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The toString()
method returns a string representing the object.
pub fn value_of(&self) -> Object
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The valueOf()
method returns the primitive value of the
specified object.
Trait Implementations
impl Clone for Map
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fn clone(&self) -> Map
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fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl AsRef<JsValue> for Map
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impl AsRef<Map> for Map
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impl AsRef<Object> for Map
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impl From<JsValue> for Map
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impl From<Map> for JsValue
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impl From<Map> for Object
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impl PartialEq<Map> for Map
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impl Eq for Map
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impl Deref for Map
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impl Debug for Map
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impl IntoWasmAbi for Map
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type Abi = <JsValue as IntoWasmAbi>::Abi
The wasm ABI type that this converts into when crossing the ABI boundary. Read more
fn into_abi(self) -> Self::Abi
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impl<'a> IntoWasmAbi for &'a Map
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type Abi = <&'a JsValue as IntoWasmAbi>::Abi
The wasm ABI type that this converts into when crossing the ABI boundary. Read more
fn into_abi(self) -> Self::Abi
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impl FromWasmAbi for Map
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type Abi = <JsValue as FromWasmAbi>::Abi
The wasm ABI type that this converts from when coming back out from the ABI boundary. Read more
unsafe fn from_abi(js: Self::Abi) -> Self
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impl RefFromWasmAbi for Map
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type Abi = <JsValue as RefFromWasmAbi>::Abi
The wasm ABI type references to Self
are recovered from.
type Anchor = ManuallyDrop<Map>
The type that holds the reference to Self
for the duration of the invocation of the function that has an &Self
parameter. This is required to ensure that the lifetimes don't persist beyond one function call, and so that they remain anonymous. Read more
unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor
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impl WasmDescribe for Map
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impl OptionIntoWasmAbi for Map
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impl<'a> OptionIntoWasmAbi for &'a Map
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impl OptionFromWasmAbi for Map
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impl JsCast for Map
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fn instanceof(val: &JsValue) -> bool
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fn unchecked_from_js(val: JsValue) -> Self
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fn unchecked_from_js_ref(val: &JsValue) -> &Self
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fn has_type<T>(&self) -> bool where
T: JsCast,
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T: JsCast,
Test whether this JS value has a type T
. Read more
fn dyn_into<T>(self) -> Result<T, Self> where
T: JsCast,
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T: JsCast,
Performs a dynamic cast (checked at runtime) of this value into the target type T
. Read more
fn dyn_ref<T>(&self) -> Option<&T> where
T: JsCast,
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T: JsCast,
Performs a dynamic cast (checked at runtime) of this value into the target type T
. Read more
fn unchecked_into<T>(self) -> T where
T: JsCast,
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T: JsCast,
Performs a zero-cost unchecked cast into the specified type. Read more
fn unchecked_ref<T>(&self) -> &T where
T: JsCast,
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T: JsCast,
Performs a zero-cost unchecked cast into a reference to the specified type. Read more
fn is_instance_of<T>(&self) -> bool where
T: JsCast,
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T: JsCast,
Test whether this JS value is an instance of the type T
. Read more
fn is_type_of(val: &JsValue) -> bool
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Performs a dynamic check to see whether the JsValue
provided is a value of this type. Read more
Auto Trait Implementations
impl Unpin for Map
impl !Sync for Map
impl !Send for Map
impl UnwindSafe for Map
impl RefUnwindSafe for Map
Blanket Implementations
impl<T> From<T> for T
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impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> ReturnWasmAbi for T where
T: IntoWasmAbi,
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T: IntoWasmAbi,
type Abi = <T as IntoWasmAbi>::Abi
Same as IntoWasmAbi::Abi