Float32Array() 构造函数

new Float32Array()
new Float32Array(length)
new Float32Array(typedArray)
new Float32Array(object)

new Float32Array(buffer)
new Float32Array(buffer, byteOffset)
new Float32Array(buffer, byteOffset, length)

// 通过长度创建
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

// 通过数组创建
const x = new Float32Array([21, 31]);
console.log(x[1]); // 31

// 通过另一个 TypedArray 创建
const y = new Float32Array(x);
console.log(y[0]); // 21

// 通过 ArrayBuffer 创建
const buffer = new ArrayBuffer(32);
const z = new Float32Array(buffer, 4, 4);
console.log(z.byteOffset); // 4

// 通过可迭代对象创建
const iterable = (function* () {
  yield* [1, 2, 3];
})();
const float32FromIterable = new Float32Array(iterable);
console.log(float32FromIterable);
// Float32Array [1, 2, 3]