[−][src]Struct sauron::prelude::js_sys::Map
Implementations
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.
Note that in Javascript land the Key
and Value
are reversed compared to normal expectations:
Examples
let js_map = Map::new(); js_map.for_each(&mut |value, key| { // Do something here... })
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.
Methods from Deref<Target = JsValue>
pub const NULL: JsValue
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pub const UNDEFINED: JsValue
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pub const TRUE: JsValue
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pub const FALSE: JsValue
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pub fn into_serde<T>(&self) -> Result<T, Error> where
T: for<'a> Deserialize<'a>,
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T: for<'a> Deserialize<'a>,
Invokes JSON.stringify
on this value and then parses the resulting
JSON into an arbitrary Rust value.
This function will first call JSON.stringify
on the JsValue
itself.
The resulting string is then passed into Rust which then parses it as
JSON into the resulting value.
Usage of this API requires activating the serde-serialize
feature of
the wasm-bindgen
crate.
Errors
Returns any error encountered when parsing the JSON into a T
.
pub fn as_f64(&self) -> Option<f64>
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Returns the f64
value of this JS value if it's an instance of a
number.
If this JS value is not an instance of a number then this returns
None
.
pub fn is_string(&self) -> bool
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Tests whether this JS value is a JS string.
pub fn as_string(&self) -> Option<String>
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If this JS value is a string value, this function copies the JS string
value into wasm linear memory, encoded as UTF-8, and returns it as a
Rust String
.
To avoid the copying and re-encoding, consider the
JsString::try_from()
function from js-sys
instead.
If this JS value is not an instance of a string or if it's not valid
utf-8 then this returns None
.
UTF-16 vs UTF-8
JavaScript strings in general are encoded as UTF-16, but Rust strings
are encoded as UTF-8. This can cause the Rust string to look a bit
different than the JS string sometimes. For more details see the
documentation about the str
type which contains a few
caveats about the encodings.
pub fn as_bool(&self) -> Option<bool>
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Returns the bool
value of this JS value if it's an instance of a
boolean.
If this JS value is not an instance of a boolean then this returns
None
.
pub fn is_null(&self) -> bool
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Tests whether this JS value is null
pub fn is_undefined(&self) -> bool
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Tests whether this JS value is undefined
pub fn is_symbol(&self) -> bool
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Tests whether the type of this JS value is symbol
pub fn is_object(&self) -> bool
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Tests whether typeof self == "object" && self !== null
.
pub fn is_function(&self) -> bool
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Tests whether the type of this JS value is function
.
pub fn is_truthy(&self) -> bool
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Tests whether the value is "truthy".
pub fn is_falsy(&self) -> bool
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Tests whether the value is "falsy".
Trait Implementations
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 Clone for Map
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impl Debug for Map
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impl Deref for Map
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impl Eq 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 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
pub unsafe fn from_abi(js: <Map as FromWasmAbi>::Abi) -> Map
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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
pub fn into_abi(self) -> <&'a Map as IntoWasmAbi>::Abi
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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
pub fn into_abi(self) -> <Map as IntoWasmAbi>::Abi
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impl JsCast for Map
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pub fn instanceof(val: &JsValue) -> bool
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pub fn unchecked_from_js(val: JsValue) -> Map
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pub fn unchecked_from_js_ref(val: &JsValue) -> &Map
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pub fn has_type<T>(&self) -> bool where
T: JsCast,
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T: JsCast,
pub fn dyn_into<T>(self) -> Result<T, Self> where
T: JsCast,
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T: JsCast,
pub fn dyn_ref<T>(&self) -> Option<&T> where
T: JsCast,
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T: JsCast,
pub fn unchecked_into<T>(self) -> T where
T: JsCast,
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T: JsCast,
pub fn unchecked_ref<T>(&self) -> &TⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
where
T: JsCast,
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Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
T: JsCast,
pub fn is_instance_of<T>(&self) -> bool where
T: JsCast,
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T: JsCast,
pub fn is_type_of(val: &JsValue) -> bool
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impl OptionFromWasmAbi for Map
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impl OptionIntoWasmAbi for Map
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pub fn none() -> <Map as IntoWasmAbi>::Abi
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impl<'a> OptionIntoWasmAbi for &'a Map
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pub fn none() -> <&'a Map as IntoWasmAbi>::Abi
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impl PartialEq<Map> for Map
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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
pub unsafe fn ref_from_abi(
js: <Map as RefFromWasmAbi>::Abi
) -> <Map as RefFromWasmAbi>::Anchor
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js: <Map as RefFromWasmAbi>::Abi
) -> <Map as RefFromWasmAbi>::Anchor
impl StructuralEq for Map
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impl StructuralPartialEq for Map
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Auto Trait Implementations
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 UnwindSafe for Map
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Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow(&self) -> &TⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
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Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut TⓘNotable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
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Notable traits for &'_ mut R
impl<'_, R> Read for &'_ mut R where
R: Read + ?Sized, impl<'_, W> Write for &'_ mut W where
W: Write + ?Sized, impl<'_, F> Future for &'_ mut F where
F: Unpin + Future + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;
impl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
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Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
pub fn equivalent(&self, key: &K) -> bool
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impl<T> From<T> for 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> ReturnWasmAbi for T where
T: IntoWasmAbi,
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T: IntoWasmAbi,
type Abi = <T as IntoWasmAbi>::Abi
Same as IntoWasmAbi::Abi
pub fn return_abi(self) -> <T as ReturnWasmAbi>::Abi
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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.
pub fn to_owned(&self) -> T
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pub fn clone_into(&self, target: &mut T)
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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.
pub 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>,