BigInt64Array() constructor
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).
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
See TypedArray
.
Exceptions
See TypedArray
.
Examples
Different ways to create a BigInt64Array
// From a length
const 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
const x = new BigInt64Array([21n, 31n]);
console.log(x[1]); // 31n
// From another TypedArray
const y = new BigInt64Array(x);
console.log(y[0]); // 21n
// From an ArrayBuffer
const buffer = new ArrayBuffer(64);
const z = new BigInt64Array(buffer, 8, 4);
console.log(z.byteOffset); // 8
// From an iterable
const iterable = function*() { yield* [1n, 2n, 3n]; }();
const bigint64FromIterable = new BigInt64Array(iterable);
console.log(bigint64FromIterable);
// BigInt64Array [1n, 2n, 3n]
Specifications
Specification |
---|
ECMAScript Language Specification # sec-typedarray-constructors |
Browser compatibility
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