The BigInt64Array()
typed array constructor creates a new BigInt64Array
object, which is, an array of 64-bit signed integers in the platform byte order. If control over byte order is needed, use DataView
instead. The contents are initialized to 0n
. Once established, you can reference elements in the array using the object's methods, or by using standard array index syntax (that is, using bracket notation).
BigInt64Array() constructor
Syntax
new BigInt64Array(); new BigInt64Array(length); new BigInt64Array(typedArray); new BigInt64Array(object); new BigInt64Array(buffer); new BigInt64Array(buffer, byteOffset); new BigInt64Array(buffer, byteOffset, length);
Parameters
-
length
-
When called with a
length
argument, an internal array buffer is created in memory, of sizelength
multiplied byBYTES_PER_ELEMENT
bytes, containing zeros. -
typedArray
-
When called with a
typedArray
argument, which can be an object of either of the bigint typed-array types (such asBigUInt64Array
), thetypedArray
gets copied into a new typed array. Each value intypedArray
is converted to the corresponding type of the constructor before being copied into the new array. The length of the new typed array will be same as the length of thetypedArray
argument. -
object
-
When called with an
object
argument, a new typed array is created as if by theTypedArray.from()
method. -
buffer
,byteOffset
,length
-
When called with a
buffer
, and optionally abyteOffset
and alength
argument, a new typed array view is created that views the specifiedArrayBuffer
. ThebyteOffset
andlength
parameters specify the memory range that will be exposed by the typed array view. If both are omitted, all ofbuffer
is viewed; if onlylength
is omitted, the remainder ofbuffer
is viewed.
Examples
Different ways to create a BigInt64Array
// From a length var bigint64 = new BigInt64Array(2); bigint64[0] = 42n; console.log(bigint64[0]); // 42n console.log(bigint64.length); // 2 console.log(bigint64.BYTES_PER_ELEMENT); // 8 // From an array var arr = new BigInt64Array([21n,31n]); console.log(arr[1]); // 31n // From another TypedArray var x = new BigInt64Array([21n, 31n]); var y = new BigInt64Array(x); console.log(y[0]); // 21n // From an ArrayBuffer var buffer = new ArrayBuffer(32); var z = new BigInt64Array(buffer, 0, 4); // From an iterable var iterable = function*(){ yield* [1n, 2n, 3n]; }(); var bigint64 = new BigInt64Array(iterable); // BigInt64Array[1n, 2n, 3n]
Specifications
Browser compatibility
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
BigInt64Array |
67
|
79
|
68
|
No
|
54
|
15
|
67
|
67
|
68
|
48
|
15
|
9.0
|
1.0
|
10.4.0
|
See also
© 2005–2022 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt64Array/BigInt64Array