Struct sauron::prelude::js_sys::Array [−][src]
#[repr(transparent)]pub struct Array { /* fields omitted */ }
Expand description
Implementations
Returns an iterator over the values of the JS array.
Creates a new array with the specified length (elements are initialized to undefined
).
The copyWithin()
method shallow copies part of an array to another
location in the same array and returns it, without modifying its size.
The concat()
method is used to merge two or more arrays. This method
does not change the existing arrays, but instead returns a new array.
The findIndex()
method returns the index of the first element in the array that
satisfies the provided testing function. Otherwise -1 is returned.
The flat()
method creates a new array with all sub-array elements concatenated into it
recursively up to the specified depth.
The Array.isArray()
method determines whether the passed value is an Array.
The join()
method joins all elements of an array (or an array-like object)
into a string and returns this string.
The lastIndexOf()
method returns the last index at which a given element
can be found in the array, or -1 if it is not present. The array is
searched backwards, starting at fromIndex.
The length property of an object which is an instance of type Array sets or returns the number of elements in that array. The value is an unsigned, 32-bit integer that is always numerically greater than the highest index in the array.
map()
calls a provided callback function once for each element in an array,
in order, and constructs a new array from the results. callback is invoked
only for indexes of the array which have assigned values, including undefined.
It is not called for missing elements of the array (that is, indexes that have
never been set, which have been deleted or which have never been assigned a value).
The Array.of()
method creates a new Array instance with a variable
number of arguments, regardless of number or type of the arguments.
The difference between Array.of()
and the Array
constructor is in the
handling of integer arguments: Array.of(7)
creates an array with a single
element, 7
, whereas Array(7)
creates an empty array with a length
property of 7
(Note: this implies an array of 7 empty slots, not slots
with actual undefined values).
Notes
There are a few bindings to of
in js-sys
: of1
, of2
, etc…
with different arities.
The pop()
method removes the last element from an array and returns that
element. This method changes the length of the array.
The push()
method adds one or more elements to the end of an array and
returns the new length of the array.
The reduceRight()
method applies a function against an accumulator and each value
of the array (from right-to-left) to reduce it to a single value.
The reverse()
method reverses an array in place. The first array
element becomes the last, and the last array element becomes the first.
The shift()
method removes the first element from an array and returns
that removed element. This method changes the length of the array.
The sort()
method sorts the elements of an array in place and returns
the array. The sort is not necessarily stable. The default sort
order is according to string Unicode code points.
The time and space complexity of the sort cannot be guaranteed as it is implementation dependent.
The toLocaleString()
method returns a string representing the elements of the array.
The elements are converted to Strings using their toLocaleString methods and these
Strings are separated by a locale-specific String (such as a comma “,”).
The toString()
method returns a string representing the specified array
and its elements.
The unshift()
method adds one or more elements to the beginning of an
array and returns the new length of the array.
The keys()
method returns a new Array Iterator object that contains the
keys for each index in the array.
The entries()
method returns a new Array Iterator object that contains
the key/value pairs for each index in the array.
The values()
method returns a new Array Iterator object that
contains the values for each index in the array.
Methods from Deref<Target = Object>
The constructor property returns a reference to the Object
constructor
function that created the instance object.
The hasOwnProperty()
method returns a boolean indicating whether the
object has the specified property as its own property (as opposed to
inheriting it).
The isPrototypeOf()
method checks if an object exists in another
object’s prototype chain.
The propertyIsEnumerable()
method returns a Boolean indicating
whether the specified property is enumerable.
The toLocaleString()
method returns a string representing the object.
This method is meant to be overridden by derived objects for
locale-specific purposes.
The toString()
method returns a string representing the object.
The valueOf()
method returns the primitive value of the
specified object.
Trait Implementations
Creates a value from an iterator. Read more
Performs a dynamic instanceof
check to see whether the JsValue
provided is an instance of this type. Read more
Performs a dynamic check to see whether the JsValue
provided
is a value of this type. Read more
Performs a zero-cost unchecked conversion from a JsValue
into an
instance of Self
Read more
Performs a zero-cost unchecked conversion from a &JsValue
into an
instance of &Self
. Read more
Test whether this JS value has a type T
. Read more
Performs a dynamic cast (checked at runtime) of this value into the
target type T
. Read more
Performs a dynamic cast (checked at runtime) of this value into the
target type T
. Read more
Performs a zero-cost unchecked cast into the specified type. Read more
Performs a zero-cost unchecked cast into a reference to the specified type. Read more
Test whether this JS value is an instance of the type T
. Read more
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<Array>
type Anchor = ManuallyDrop<Array>
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: <Array as RefFromWasmAbi>::Abi
) -> <Array as RefFromWasmAbi>::Anchor
pub unsafe fn ref_from_abi(
js: <Array as RefFromWasmAbi>::Abi
) -> <Array as RefFromWasmAbi>::Anchor
Recover a Self::Anchor
from Self::Abi
. Read more
Auto Trait Implementations
impl RefUnwindSafe for Array
impl UnwindSafe for Array
Blanket Implementations
Mutably borrows from an owned value. Read more
type Abi = <T as IntoWasmAbi>::Abi
type Abi = <T as IntoWasmAbi>::Abi
Same as IntoWasmAbi::Abi
Same as IntoWasmAbi::into_abi
, except that it may throw and never
return in the case of Err
. Read more