Float32Array() constructor
The Float32Array()
constructor creates Float32Array
objects. The contents are initialized to 0
.
Syntax
new Float32Array()
new Float32Array(length)
new Float32Array(typedArray)
new Float32Array(object)
new Float32Array(buffer)
new Float32Array(buffer, byteOffset)
new Float32Array(buffer, byteOffset, length)
Parameters
See TypedArray
.
Exceptions
See TypedArray
.
Examples
Different ways to create a Float32Array
// From a length
const float32 = new Float32Array(2);
float32[0] = 42;
console.log(float32[0]); // 42
console.log(float32.length); // 2
console.log(float32.BYTES_PER_ELEMENT); // 4
// From an array
const x = new Float32Array([21, 31]);
console.log(x[1]); // 31
// From another TypedArray
const y = new Float32Array(x);
console.log(y[0]); // 21
// From an ArrayBuffer
const buffer = new ArrayBuffer(32);
const z = new Float32Array(buffer, 4, 4);
console.log(z.byteOffset); // 4
// From an iterable
const iterable = (function* () {
yield* [1, 2, 3];
})();
const float32FromIterable = new Float32Array(iterable);
console.log(float32FromIterable);
// Float32Array [1, 2, 3]
Specifications
Specification |
---|
ECMAScript Language Specification # sec-typedarray-constructors |
Browser compatibility
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