Struct Float32Array

pub struct Float32Array { /* private fields */ }

Available on crate feature dep_web_sys only.

Implementations

impl Float32Array

pub fn new(constructor_arg: &JsValue) -> Float32Array

Available on crate feature dep_js_sys only.

The Float32Array() constructor creates a new array.

MDN documentation

impl Float32Array

pub fn new_with_length(length: u32) -> Float32Array

Available on crate feature dep_js_sys only.

An Float32Array() which creates an array with an internal buffer large enough for length elements.

MDN documentation

impl Float32Array

pub fn new_with_byte_offset(buffer: &JsValue, byte_offset: u32) -> Float32Array

Available on crate feature dep_js_sys only.

An Float32Array() which creates an array with the given buffer but is a view starting at byte_offset.

MDN documentation

impl Float32Array

pub fn new_with_byte_offset_and_length( buffer: &JsValue, byte_offset: u32, length: u32, ) -> Float32Array

Available on crate feature dep_js_sys only.

An Float32Array() which creates an array with the given buffer but is a view starting at byte_offset for length elements.

MDN documentation

impl Float32Array

pub fn fill(&self, value: f32, start: u32, end: u32) -> Float32Array

Available on crate feature dep_js_sys only.

The fill() method fills all the elements of an array from a start index to an end index with a static value. The end index is not included.

MDN documentation

impl Float32Array

pub fn buffer(&self) -> ArrayBuffer

Available on crate feature dep_js_sys only.

The buffer accessor property represents the ArrayBuffer referenced by a TypedArray at construction time.

impl Float32Array

pub fn subarray(&self, begin: u32, end: u32) -> Float32Array

Available on crate feature dep_js_sys only.

The subarray() method returns a new TypedArray on the same ArrayBuffer store and with the same element types as for this TypedArray object.

impl Float32Array

pub fn slice(&self, begin: u32, end: u32) -> Float32Array

Available on crate feature dep_js_sys only.

The slice() method returns a shallow copy of a portion of a typed array into a new typed array object. This method has the same algorithm as Array.prototype.slice().

impl Float32Array

pub fn for_each(&self, callback: &mut dyn FnMut(f32, u32, Float32Array))

Available on crate feature dep_js_sys only.

The forEach() method executes a provided function once per array element. This method has the same algorithm as Array.prototype.forEach(). TypedArray is one of the typed array types here.

impl Float32Array

pub fn length(&self) -> u32

Available on crate feature dep_js_sys only.

The length accessor property represents the length (in elements) of a typed array.

impl Float32Array

pub fn byte_length(&self) -> u32

Available on crate feature dep_js_sys only.

The byteLength accessor property represents the length (in bytes) of a typed array.

impl Float32Array

pub fn byte_offset(&self) -> u32

Available on crate feature dep_js_sys only.

The byteOffset accessor property represents the offset (in bytes) of a typed array from the start of its ArrayBuffer.

impl Float32Array

pub fn set(&self, src: &JsValue, offset: u32)

Available on crate feature dep_js_sys only.

The set() method stores multiple values in the typed array, reading input values from a specified array.

impl Float32Array

pub fn at(&self, idx: i32) -> Option<f32>

Available on crate feature dep_js_sys only.

Gets the value at idx, counting from the end if negative.

impl Float32Array

pub fn copy_within(&self, target: i32, start: i32, end: i32) -> Float32Array

Available on crate feature dep_js_sys only.

The copyWithin() method shallow copies part of a typed array to another location in the same typed array and returns it, without modifying its size.

MDN documentation

impl Float32Array

pub fn get_index(&self, idx: u32) -> f32

Available on crate feature dep_js_sys only.

Gets the value at idx, equivalent to the javascript my_var = arr[idx].

impl Float32Array

pub fn set_index(&self, idx: u32, value: f32)

Available on crate feature dep_js_sys only.

Sets the value at idx, equivalent to the javascript arr[idx] = value.

impl Float32Array

pub unsafe fn view(rust: &[f32]) -> Float32Array

Available on crate feature dep_js_sys only.

Creates a JS typed array which is a view into wasm’s linear memory at the slice specified.

This function returns a new typed array which is a view into wasm’s memory. This view does not copy the underlying data.

Safety

Views into WebAssembly memory are only valid so long as the backing buffer isn’t resized in JS. Once this function is called any future calls to Box::new (or malloc of any form) may cause the returned value here to be invalidated. Use with caution!

Additionally the returned object can be safely mutated but the input slice isn’t guaranteed to be mutable.

Finally, the returned object is disconnected from the input slice’s lifetime, so there’s no guarantee that the data is read at the right time.

pub unsafe fn view_mut_raw(ptr: *mut f32, length: usize) -> Float32Array

Available on crate feature dep_js_sys only.

Creates a JS typed array which is a view into wasm’s linear memory at the specified pointer with specified length.

This function returns a new typed array which is a view into wasm’s memory. This view does not copy the underlying data.

Safety

Views into WebAssembly memory are only valid so long as the backing buffer isn’t resized in JS. Once this function is called any future calls to Box::new (or malloc of any form) may cause the returned value here to be invalidated. Use with caution!

Additionally the returned object can be safely mutated, the changes are guaranteed to be reflected in the input array.

pub unsafe fn raw_copy_to_ptr(&self, dst: *mut f32)

Available on crate feature dep_js_sys only.

Copy the contents of this JS typed array into the destination Rust pointer.

This function will efficiently copy the memory from a typed array into this Wasm module’s own linear memory, initializing the memory destination provided.

Safety

This function requires dst to point to a buffer large enough to fit this array’s contents.

pub fn copy_to(&self, dst: &mut [f32])

Available on crate feature dep_js_sys only.

Copy the contents of this JS typed array into the destination Rust slice.

This function will efficiently copy the memory from a typed array into this Wasm module’s own linear memory, initializing the memory destination provided.

Panics

This function will panic if this typed array’s length is different than the length of the provided dst array.

pub fn copy_to_uninit<'dst>( &self, dst: &'dst mut [MaybeUninit<f32>], ) -> &'dst mut [f32]

Available on crate feature dep_js_sys only.

Copy the contents of this JS typed array into the destination Rust slice.

This function will efficiently copy the memory from a typed array into this Wasm module’s own linear memory, initializing the memory destination provided.

Panics

This function will panic if this typed array’s length is different than the length of the provided dst array.

pub fn copy_from(&self, src: &[f32])

Available on crate feature dep_js_sys only.

Copy the contents of the source Rust slice into this JS typed array.

This function will efficiently copy the memory from within the Wasm module’s own linear memory to this typed array.

Panics

This function will panic if this typed array’s length is different than the length of the provided src array.

pub fn to_vec(&self) -> Vec<f32>

Available on crate feature dep_js_sys only.

Efficiently copies the contents of this JS typed array into a new Vec.

Methods from Deref<Target = Object>

pub fn constructor(&self) -> Function

Available on crate feature dep_js_sys only.

The constructor property returns a reference to the Object constructor function that created the instance object.

MDN documentation

pub fn has_own_property(&self, property: &JsValue) -> bool

Available on crate feature dep_js_sys only.

The hasOwnProperty() method returns a boolean indicating whether the object has the specified property as its own property (as opposed to inheriting it).

MDN documentation

pub fn is_prototype_of(&self, value: &JsValue) -> bool

Available on crate feature dep_js_sys only.

The isPrototypeOf() method checks if an object exists in another object’s prototype chain.

MDN documentation

pub fn property_is_enumerable(&self, property: &JsValue) -> bool

Available on crate feature dep_js_sys only.

The propertyIsEnumerable() method returns a Boolean indicating whether the specified property is enumerable.

MDN documentation

pub fn to_locale_string(&self) -> JsString

Available on crate feature dep_js_sys only.

The toLocaleString() method returns a string representing the object. This method is meant to be overridden by derived objects for locale-specific purposes.

MDN documentation

pub fn to_string(&self) -> JsString

Available on crate feature dep_js_sys only.

The toString() method returns a string representing the object.

MDN documentation

pub fn value_of(&self) -> Object

Available on crate feature dep_js_sys only.

The valueOf() method returns the primitive value of the specified object.

MDN documentation

Methods from Deref<Target = JsValue>

pub const NULL: JsValue

pub const UNDEFINED: JsValue

pub const TRUE: JsValue

pub const FALSE: JsValue

pub fn as_f64(&self) -> Option<f64>

Available on crate feature dep_js_sys only.

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

Available on crate feature dep_js_sys only.

Tests whether this JS value is a JS string.

pub fn as_string(&self) -> Option<String>

Available on crate feature dep_js_sys only.

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>

Available on crate feature dep_js_sys only.

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

Available on crate feature dep_js_sys only.

Tests whether this JS value is null

pub fn is_undefined(&self) -> bool

Available on crate feature dep_js_sys only.

Tests whether this JS value is undefined

pub fn is_symbol(&self) -> bool

Available on crate feature dep_js_sys only.

Tests whether the type of this JS value is symbol

pub fn is_object(&self) -> bool

Available on crate feature dep_js_sys only.

Tests whether typeof self == "object" && self !== null.

pub fn is_array(&self) -> bool

Available on crate feature dep_js_sys only.

Tests whether this JS value is an instance of Array.

pub fn is_function(&self) -> bool

Available on crate feature dep_js_sys only.

Tests whether the type of this JS value is function.

pub fn is_bigint(&self) -> bool

Available on crate feature dep_js_sys only.

Tests whether the type of this JS value is bigint.

pub fn js_typeof(&self) -> JsValue

Available on crate feature dep_js_sys only.

Applies the unary typeof JS operator on a JsValue.

MDN documentation

pub fn js_in(&self, obj: &JsValue) -> bool

Available on crate feature dep_js_sys only.

Applies the binary in JS operator on the two JsValues.

MDN documentation

pub fn is_truthy(&self) -> bool

Available on crate feature dep_js_sys only.

Tests whether the value is “truthy”.

pub fn is_falsy(&self) -> bool

Available on crate feature dep_js_sys only.

Tests whether the value is “falsy”.

pub fn loose_eq(&self, other: &JsValue) -> bool

Available on crate feature dep_js_sys only.

Compare two JsValues for equality, using the == operator in JS.

MDN documentation

pub fn bit_not(&self) -> JsValue

Available on crate feature dep_js_sys only.

Applies the unary ~ JS operator on a JsValue.

MDN documentation

pub fn unsigned_shr(&self, rhs: &JsValue) -> u32

Available on crate feature dep_js_sys only.

Applies the binary >>> JS operator on the two JsValues.

MDN documentation

pub fn checked_div(&self, rhs: &JsValue) -> JsValue

Available on crate feature dep_js_sys only.

Applies the binary / JS operator on two JsValues, catching and returning any RangeError thrown.

MDN documentation

pub fn pow(&self, rhs: &JsValue) -> JsValue

Available on crate feature dep_js_sys only.

Applies the binary ** JS operator on the two JsValues.

MDN documentation

pub fn lt(&self, other: &JsValue) -> bool

Available on crate feature dep_js_sys only.

Applies the binary < JS operator on the two JsValues.

MDN documentation

pub fn le(&self, other: &JsValue) -> bool

Available on crate feature dep_js_sys only.

Applies the binary <= JS operator on the two JsValues.

MDN documentation

pub fn ge(&self, other: &JsValue) -> bool

Available on crate feature dep_js_sys only.

Applies the binary >= JS operator on the two JsValues.

MDN documentation

pub fn gt(&self, other: &JsValue) -> bool

Available on crate feature dep_js_sys only.

Applies the binary > JS operator on the two JsValues.

MDN documentation

pub fn unchecked_into_f64(&self) -> f64

Available on crate feature dep_js_sys only.

Applies the unary + JS operator on a JsValue. Can throw.

MDN documentation

Trait Implementations

impl AsRef<Float32Array> for Float32Array

fn as_ref(&self) -> &Float32Array

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<JsValue> for Float32Array

fn as_ref(&self) -> &JsValue

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<Object> for Float32Array

fn as_ref(&self) -> &Object

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for Float32Array

fn clone(&self) -> Float32Array

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Float32Array

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

Formats the value using the given formatter.

impl Default for Float32Array

fn default() -> Float32Array

Returns the “default value” for a type.

impl Deref for Float32Array

type Target = Object

The resulting type after dereferencing.

fn deref(&self) -> &Object

Dereferences the value.

impl<'a> From<&'a [f32]> for Float32Array

fn from(slice: &'a [f32]) -> Float32Array

Converts to this type from the input type.

impl From<Float32Array> for JsValue

fn from(obj: Float32Array) -> JsValue

Converts to this type from the input type.

impl From<Float32Array> for Object

fn from(obj: Float32Array) -> Object

Converts to this type from the input type.

impl From<JsValue> for Float32Array

fn from(obj: JsValue) -> Float32Array

Converts to this type from the input type.

impl FromWasmAbi for Float32Array

type Abi = <JsValue as FromWasmAbi>::Abi

The Wasm ABI type that this converts from when coming back out from the ABI boundary.

unsafe fn from_abi(js: <Float32Array as FromWasmAbi>::Abi) -> Float32Array

Recover a Self from Self::Abi.

impl<'a> IntoWasmAbi for &'a Float32Array

type Abi = <&'a JsValue as IntoWasmAbi>::Abi

The Wasm ABI type that this converts into when crossing the ABI boundary.

fn into_abi(self) -> <&'a Float32Array as IntoWasmAbi>::Abi

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary.

impl IntoWasmAbi for Float32Array

type Abi = <JsValue as IntoWasmAbi>::Abi

The Wasm ABI type that this converts into when crossing the ABI boundary.

fn into_abi(self) -> <Float32Array as IntoWasmAbi>::Abi

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary.

impl JsCast for Float32Array

fn instanceof(val: &JsValue) -> bool

Performs a dynamic instanceof check to see whether the JsValue provided is an instance of this type.

fn unchecked_from_js(val: JsValue) -> Float32Array

Performs a zero-cost unchecked conversion from a JsValue into an instance of Self

fn unchecked_from_js_ref(val: &JsValue) -> &Float32Array

Performs a zero-cost unchecked conversion from a &JsValue into an instance of &Self.

fn has_type<T>(&self) -> bool

where T: JsCast,

Test whether this JS value has a type T.

fn dyn_into<T>(self) -> Result<T, Self>

where T: JsCast,

Performs a dynamic cast (checked at runtime) of this value into the target type T.

fn dyn_ref<T>(&self) -> Option<&T>

where T: JsCast,

Performs a dynamic cast (checked at runtime) of this value into the target type T.

fn unchecked_into<T>(self) -> T

where T: JsCast,

Performs a zero-cost unchecked cast into the specified type.

fn unchecked_ref<T>(&self) -> &T

where T: JsCast,

Performs a zero-cost unchecked cast into a reference to the specified type.

fn is_instance_of<T>(&self) -> bool

where T: JsCast,

Test whether this JS value is an instance of the type T.

fn is_type_of(val: &JsValue) -> bool

Performs a dynamic check to see whether the JsValue provided is a value of this type.

impl LongRefFromWasmAbi for Float32Array

type Abi = <JsValue as LongRefFromWasmAbi>::Abi

Same as RefFromWasmAbi::Abi

type Anchor = Float32Array

Same as RefFromWasmAbi::Anchor

unsafe fn long_ref_from_abi( js: <Float32Array as LongRefFromWasmAbi>::Abi, ) -> <Float32Array as LongRefFromWasmAbi>::Anchor

Same as RefFromWasmAbi::ref_from_abi

impl OptionFromWasmAbi for Float32Array

fn is_none(abi: &<Float32Array as FromWasmAbi>::Abi) -> bool

Tests whether the argument is a “none” instance. If so it will be deserialized as None, and otherwise it will be passed to FromWasmAbi.

impl<'a> OptionIntoWasmAbi for &'a Float32Array

fn none() -> <&'a Float32Array as IntoWasmAbi>::Abi

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option.

impl OptionIntoWasmAbi for Float32Array

fn none() -> <Float32Array as IntoWasmAbi>::Abi

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option.

impl RefFromWasmAbi for Float32Array

type Abi = <JsValue as RefFromWasmAbi>::Abi

The Wasm ABI type references to Self are recovered from.

type Anchor = ManuallyDrop<Float32Array>

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.

unsafe fn ref_from_abi( js: <Float32Array as RefFromWasmAbi>::Abi, ) -> <Float32Array as RefFromWasmAbi>::Anchor

Recover a Self::Anchor from Self::Abi.