BigInt64Array - JavaScript | MDN
Try it
const buffer = new ArrayBuffer(24);
const bigint64 = new BigInt64Array(buffer);
bigint64[0] = 5886014448488689n;
bigint64[1] = 1881938909131133n;
bigint64[2] = 1898875537769492n;
bigint64[0] = 6118793953620967n;
console.log(bigint64);
// Expected Output: BigInt64Array [6118793953620967n, 1881938909131133n, 1898875537769492n]
console.log(bigint64[2]);
// Expected Output: 1898875537769492n
console.log("Array length:", bigint64.length);
// Expected Output: Array length: 3
console.log("Array byte length:", bigint64.byteLength);
// Expected Output: Array byte length: 24
console.log("Array byte offset:", bigint64.byteOffset);
// Expected Output: Array byte offset: 0
bigint64.set([100n, 200n], 1);
console.log(bigint64);
// Expected Output: BigInt64Array [6118793953620967n, 100n, 200n]
Constructor
BigInt64Array()-
Creates a new
BigInt64Arrayobject.
Static properties
Also inherits static properties from its parent TypedArray.
BigInt64Array.BYTES_PER_ELEMENT-
Returns a number value of the element size.
8in the case ofBigInt64Array.
Static methods
Inherits static methods from its parent TypedArray.
Instance properties
Also inherits instance properties from its parent TypedArray.
These properties are defined on BigInt64Array.prototype and shared by all BigInt64Array instances.
BigInt64Array.prototype.BYTES_PER_ELEMENT-
Returns a number value of the element size.
8in the case of aBigInt64Array. BigInt64Array.prototype.constructor-
The constructor function that created the instance object. For
BigInt64Arrayinstances, the initial value is theBigInt64Arrayconstructor.
Instance methods
Inherits instance methods from its parent TypedArray.
Examples
Different ways to create a BigInt64Array
js
// 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® 2027 Language Specification # sec-typedarray-objects |