BigUint64Array
类型数组表示一个平台字节顺序的64位无符号整型数组。如果想要控制字符顺序,请使用 DataView
替代。内容初始化为 0n
. 创建之后可以使用对象中的方法或使用标准数组索引语法(括号表示法)来获取数组中的元素。
句法
new BigUint64Array(); new BigUint64Array(length); new BigUint64Array(typedArray); new BigUint64Array(object); new BigUint64Array(buffer [, byteOffset [, length]]);
更多有关构造方法和参数的信息,参见 TypedArray.
属性
-
BigUint64Array.BYTES_PER_ELEMENT
-
返回一个元素容量的数字值.
8
in the case of aBigUint64Array
. - BigUint64Array.length
-
Static length property whose value is 3. For the actual length (number of elements), see
BigUint64Array.prototype.length
. -
BigUint64Array.name
-
Returns the string value of the constructor name. In the case of the
BigUint64Array
type: "BigUint64Array". -
BigUint64Array.prototype
- Prototype for the TypedArray objects.
Methods
-
BigUint64Array.from()
-
Creates a new
BigUint64Array
from an array-like or iterable object. See alsoArray.from()
. -
BigUint64Array.of()
-
Creates a new
BigUint64Array
with a variable number of arguments. See alsoArray.of()
.
BigUint64Array
prototype
All BigUint64Array
objects inherit from %TypedArray%.prototype
.
Properties
-
BigUint64Array.prototype.constructor
-
Returns the function that created an instance's prototype. This is the
BigUint64Array
constructor by default. -
BigUint64Array.prototype.buffer
只读 -
Returns the
ArrayBuffer
referenced by theBigUint64Array
. Fixed at construction time and thus read only. -
BigUint64Array.prototype.byteLength
只读 -
Returns the length (in bytes) of the
BigUint64Array
from the start of itsArrayBuffer
. Fixed at construction time and thus read only. -
BigUint64Array.prototype.byteOffset
只读 -
Returns the offset (in bytes) of the
BigUint64Array
from the start of itsArrayBuffer
. Fixed at construction time and thus read only. -
BigUint64Array.prototype.length
只读 -
Returns the number of elements hold in the
BigUint64Array
. Fixed at construction time and thus read only.
Methods
-
BigUint64Array.prototype.copyWithin()
-
Copies a sequence of array elements within the array. See also
Array.prototype.copyWithin()
. -
BigUint64Array.prototype.entries()
-
Returns a new
Array Iterator
object that contains the key/value pairs for each index in the array. See alsoArray.prototype.entries()
. -
BigUint64Array.prototype.every()
-
Tests whether all elements in the array pass the test provided by a function. See also
Array.prototype.every()
. -
BigUint64Array.prototype.fill()
-
Fills all the elements of an array from a start index to an end index with a static value. See also
Array.prototype.fill()
. -
BigUint64Array.prototype.filter()
-
Creates a new array with all of the elements of this array for which the provided filtering function returns true. See also
Array.prototype.filter()
. -
BigUint64Array.prototype.find()
-
Returns the found value in the array, if an element in the array satisfies the provided testing function or
undefined
if not found. See alsoArray.prototype.find()
. -
BigUint64Array.prototype.findIndex()
-
Returns the found index in the array, if an element in the array satisfies the provided testing function or -1 if not found. See also
Array.prototype.findIndex()
. -
BigUint64Array.prototype.forEach()
-
Calls a function for each element in the array. See also
Array.prototype.forEach()
. -
BigUint64Array.prototype.includes()
-
Determines whether a typed array includes a certain element, returning
true
orfalse
as appropriate. See alsoArray.prototype.includes()
. -
BigUint64Array.prototype.indexOf()
-
Returns the first (least) index of an element within the array equal to the specified value, or -1 if none is found. See also
Array.prototype.indexOf()
. -
BigUint64Array.prototype.join()
-
Joins all elements of an array into a string. See also
Array.prototype.join()
. -
BigUint64Array.prototype.keys()
-
Returns a new
Array Iterator
that contains the keys for each index in the array. See alsoArray.prototype.keys()
. -
BigUint64Array.prototype.lastIndexOf()
-
Returns the last (greatest) index of an element within the array equal to the specified value, or -1 if none is found. See also
Array.prototype.lastIndexOf()
. -
BigUint64Array.prototype.map()
-
Creates a new array with the results of calling a provided function on every element in this array. See also
Array.prototype.map()
. -
BigUint64Array.prototype.reduce()
-
Apply a function against an accumulator and each value of the array (from left-to-right) as to reduce it to a single value. See also
Array.prototype.reduce()
. -
BigUint64Array.prototype.reduceRight()
-
Apply a function against an accumulator and each value of the array (from right-to-left) as to reduce it to a single value. See also
Array.prototype.reduceRight()
. -
BigUint64Array.prototype.reverse()
-
Reverses the order of the elements of an array — the first becomes the last, and the last becomes the first. See also
Array.prototype.reverse()
. -
BigUint64Array.prototype.set()
- Stores multiple values in the typed array, reading input values from a specified array.
-
BigUint64Array.prototype.slice()
-
Extracts a section of an array and returns a new array. See also
Array.prototype.slice()
. -
BigUint64Array.prototype.some()
-
Returns true if at least one element in this array satisfies the provided testing function. See also
Array.prototype.some()
. -
BigUint64Array.prototype.sort()
-
Sorts the elements of an array in place and returns the array. See also
Array.prototype.sort()
. -
BigUint64Array.prototype.subarray()
-
Returns a new
BigUint64Array
from the given start and end element index. -
BigUint64Array.prototype.values()
-
Returns a new
Array Iterator
object that contains the values for each index in the array. See alsoArray.prototype.values()
. -
BigUint64Array.prototype.toLocaleString()
-
Returns a localized string representing the array and its elements. See also
Array.prototype.toLocaleString()
. -
BigUint64Array.prototype.toString()
-
Returns a string representing the array and its elements. See also
Array.prototype.toString()
. -
BigUint64Array.prototype[@@iterator]()
-
Returns a new
Array Iterator
object that contains the values for each index in the array.
Examples
Different ways to create a BigUint64Array
:
// From a length var biguint64 = new BigUint64Array(2); biguint64[0] = 42n; console.log(biguint64[0]); // 42n console.log(biguint64.length); // 2 console.log(biguint64.BYTES_PER_ELEMENT); // 8 // From an array var arr = new BigUint64Array([21n,31n]); console.log(arr[1]); // 31n // From another TypedArray var x = new BigUint64Array([21n, 31n]); var y = new BigUint64Array(x); console.log(y[0]); // 21n // From an ArrayBuffer var buffer = new ArrayBuffer(32); var z = new BigUint64Array(buffer, 0, 4); // From an iterable var iterable = function*(){ yield* [1n, 2n, 3n]; }(); var biguint64 = new BigUint64Array(iterable); // BigUint64Array[1n, 2n, 3n]
Specifications
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out
https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
BigUint64Array |
Chrome Full support 67 | Edge No support No | Firefox Full support 68 | IE No support No | Opera Full support 54 | Safari No support No | WebView Android Full support 67 | Chrome Android Full support 67 | Firefox Android Full support 68 | Opera Android Full support 48 | Safari iOS No support No | Samsung Internet Android Full support 9.0 | nodejs Full support 10.4.0 |
Legend
- Full support
- Full support
- No support
- No support