Float64Array - JavaScript | MDN
Constructor
Float64Array()-
Creates a new
Float64Arrayobject.
Static properties
Also inherits static properties from its parent TypedArray.
Float64Array.BYTES_PER_ELEMENT-
Returns a number value of the element size.
8in the case ofFloat64Array.
Static methods
Inherits static methods from its parent TypedArray.
Instance properties
Also inherits instance properties from its parent TypedArray.
These properties are defined on Float64Array.prototype and shared by all Float64Array instances.
Float64Array.prototype.BYTES_PER_ELEMENT-
Returns a number value of the element size.
8in the case of aFloat64Array. Float64Array.prototype.constructor-
The constructor function that created the instance object. For
Float64Arrayinstances, the initial value is theFloat64Arrayconstructor.
Instance methods
Inherits instance methods from its parent TypedArray.
Examples
Different ways to create a Float64Array
js
// From a length
const float64 = new Float64Array(2);
float64[0] = 42;
console.log(float64[0]); // 42
console.log(float64.length); // 2
console.log(float64.BYTES_PER_ELEMENT); // 8
// From an array
const x = new Float64Array([21, 31]);
console.log(x[1]); // 31
// From another TypedArray
const y = new Float64Array(x);
console.log(y[0]); // 21
// From an ArrayBuffer
const buffer = new ArrayBuffer(64);
const z = new Float64Array(buffer, 8, 4);
console.log(z.byteOffset); // 8
// From an iterable
const iterable = (function* () {
yield* [1, 2, 3];
})();
const float64FromIterable = new Float64Array(iterable);
console.log(float64FromIterable);
// Float64Array [1, 2, 3]
Specifications
| Specification |
|---|
| ECMAScript® 2027 Language Specification # sec-typedarray-objects |