Struct js_sys::Number [−][src]
#[repr(transparent)]pub struct Number { /* fields omitted */ }
Implementations
impl Number
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impl Number
[src]impl Number
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impl Number
[src]pub fn is_integer(value: &JsValue) -> bool
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pub fn is_integer(value: &JsValue) -> bool
[src]The Number.isInteger()
method determines whether the passed value is an integer.
impl Number
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impl Number
[src]impl Number
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impl Number
[src]pub fn is_safe_integer(value: &JsValue) -> bool
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pub fn is_safe_integer(value: &JsValue) -> bool
[src]The Number.isSafeInteger()
method determines whether the provided value is a number
that is a safe integer.
impl Number
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impl Number
[src]impl Number
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impl Number
[src]pub fn parse_float(text: &str) -> f64
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pub fn parse_float(text: &str) -> f64
[src]The Number.parseFloat()
method parses a string argument and returns a
floating point number.
impl Number
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impl Number
[src]pub fn to_locale_string(&self, locale: &str) -> JsString
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pub fn to_locale_string(&self, locale: &str) -> JsString
[src]The toLocaleString()
method returns a string with a language sensitive
representation of this number.
impl Number
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impl Number
[src]impl Number
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impl Number
[src]impl Number
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impl Number
[src]impl Number
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impl Number
[src]pub const MAX_SAFE_INTEGER: f64
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pub const MAX_SAFE_INTEGER: f64
[src]The maximum safe integer in JavaScript (2^53 - 1).
pub const MIN_SAFE_INTEGER: f64
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pub const MIN_SAFE_INTEGER: f64
[src]The minimum safe integer in JavaScript (-(2^53 - 1)).
pub const MIN_VALUE: f64
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pub const MIN_VALUE: f64
[src]The smallest positive representable number—that is, the positive number closest to zero (without actually being zero).
pub const NEGATIVE_INFINITY: f64
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pub const NEGATIVE_INFINITY: f64
[src]Special value representing negative infinity. Returned on overflow.
pub const POSITIVE_INFINITY: f64
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pub const POSITIVE_INFINITY: f64
[src]Special value representing infinity. Returned on overflow.
Methods from Deref<Target = Object>
pub fn constructor(&self) -> Function
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pub fn constructor(&self) -> Function
[src]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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pub fn has_own_property(&self, property: &JsValue) -> bool
[src]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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pub fn is_prototype_of(&self, value: &JsValue) -> bool
[src]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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pub fn property_is_enumerable(&self, property: &JsValue) -> bool
[src]The propertyIsEnumerable()
method returns a Boolean indicating
whether the specified property is enumerable.
pub fn to_locale_string(&self) -> JsString
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pub fn to_locale_string(&self) -> JsString
[src]The toLocaleString()
method returns a string representing the object.
This method is meant to be overridden by derived objects for
locale-specific purposes.
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 as_f64(&self) -> Option<f64>
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pub fn as_f64(&self) -> Option<f64>
[src]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 as_string(&self) -> Option<String>
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pub fn as_string(&self) -> Option<String>
[src]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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pub fn as_bool(&self) -> Option<bool>
[src]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_undefined(&self) -> bool
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pub fn is_undefined(&self) -> bool
[src]Tests whether this JS value is undefined
pub fn is_function(&self) -> bool
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pub fn is_function(&self) -> bool
[src]Tests whether the type of this JS value is function
.
Trait Implementations
impl FromWasmAbi for Number
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impl FromWasmAbi for Number
[src]impl IntoWasmAbi for Number
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impl IntoWasmAbi for Number
[src]impl<'a> IntoWasmAbi for &'a Number
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impl<'a> IntoWasmAbi for &'a Number
[src]impl JsCast for Number
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impl JsCast for Number
[src]fn instanceof(val: &JsValue) -> bool
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fn instanceof(val: &JsValue) -> bool
[src]Performs a dynamic instanceof
check to see whether the JsValue
provided is an instance of this type. Read more
fn is_type_of(val: &JsValue) -> bool
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fn is_type_of(val: &JsValue) -> bool
[src]Performs a dynamic check to see whether the JsValue
provided
is a value of this type. Read more
fn unchecked_from_js(val: JsValue) -> Self
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fn unchecked_from_js(val: JsValue) -> Self
[src]Performs a zero-cost unchecked conversion from a JsValue
into an
instance of Self
Read more
fn unchecked_from_js_ref(val: &JsValue) -> &Self
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fn unchecked_from_js_ref(val: &JsValue) -> &Self
[src]Performs a zero-cost unchecked conversion from a &JsValue
into an
instance of &Self
. Read more
fn has_type<T>(&self) -> bool where
T: JsCast,
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fn has_type<T>(&self) -> bool where
T: JsCast,
[src]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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fn dyn_into<T>(self) -> Result<T, Self> where
T: JsCast,
[src]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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fn dyn_ref<T>(&self) -> Option<&T> where
T: JsCast,
[src]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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fn unchecked_into<T>(self) -> T where
T: JsCast,
[src]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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fn unchecked_ref<T>(&self) -> &T where
T: JsCast,
[src]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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fn is_instance_of<T>(&self) -> bool where
T: JsCast,
[src]Test whether this JS value is an instance of the type T
. Read more
impl OptionFromWasmAbi for Number
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impl OptionFromWasmAbi for Number
[src]impl OptionIntoWasmAbi for Number
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impl OptionIntoWasmAbi for Number
[src]impl<'a> OptionIntoWasmAbi for &'a Number
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impl<'a> OptionIntoWasmAbi for &'a Number
[src]impl RefFromWasmAbi for Number
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impl RefFromWasmAbi for Number
[src]type Abi = <JsValue as RefFromWasmAbi>::Abi
type Abi = <JsValue as RefFromWasmAbi>::Abi
The wasm ABI type references to Self
are recovered from.
type Anchor = ManuallyDrop<Number>
type Anchor = ManuallyDrop<Number>
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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unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor
[src]Recover a Self::Anchor
from Self::Abi
. Read more
Auto Trait Implementations
impl RefUnwindSafe for Number
impl !Send for Number
impl !Sync for Number
impl Unpin for Number
impl UnwindSafe for Number
Blanket Implementations
impl<T> BorrowMut<T> for T where
T: ?Sized,
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impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]pub fn borrow_mut(&mut self) -> &mut T
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pub fn borrow_mut(&mut self) -> &mut T
[src]Mutably borrows from an owned value. Read more
impl<T> ReturnWasmAbi for T where
T: IntoWasmAbi,
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impl<T> ReturnWasmAbi for T where
T: IntoWasmAbi,
[src]type Abi = <T as IntoWasmAbi>::Abi
type Abi = <T as IntoWasmAbi>::Abi
Same as IntoWasmAbi::Abi
pub fn return_abi(self) -> <T as ReturnWasmAbi>::Abi
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pub fn return_abi(self) -> <T as ReturnWasmAbi>::Abi
[src]Same as IntoWasmAbi::into_abi
, except that it may throw and never
return in the case of Err
. Read more
impl<T> ToOwned for T where
T: Clone,
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impl<T> ToOwned for T where
T: Clone,
[src]type Owned = T
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn to_owned(&self) -> T
[src]Creates owned data from borrowed data, usually by cloning. Read more
pub fn clone_into(&self, target: &mut T)
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pub fn clone_into(&self, target: &mut T)
[src]🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more