javascript - 替换 JS chrome 控制台中的 ArrayBuffer 变量

Question

我正在尝试从 Chrome 控制台替换下面的 ArrayBuffer a。

但是当我执行 a = [43,43,....] 时，它会使其成为一个数组。如何初始化一个新的 Arraybuffer ？

a: ArrayBuffer(86)
[[Int8Array]]: Int8Array(86) [-8, 6, 9, 91, 75, 107, -4, 2, 49, 51, -8, 1, -8, 2, 52, -4, 69, 10, 53, 10, 27, 57, 49, 56, 50, 56, 53, 54, 49, 48, 56, 56, 55, 64, 115, 46, 119, 104, 97, 116, 115, 97, 112, 112, 46, 110, 101, 116, 16, 1, 26, 20, 51, 69, 66, 48, 57, 69, 50, 48, 49, 51, 69, 65, 65, 67, 50, 56, 66, 51, 55, 54, 18, 4, 10, 2, 108, 111, 24, -32, -71, -91, -35, 5, 32, 1]

[[Int16Array]]: Int16Array(43) [1784, 23305, 27467, 764, 13105, 504, 760, -972, 2629, 2613, 14619, 14385, 14386, 13877, 12337, 14392, 16439, 11891, 26743, 29793, 24947, 28784, 28206, 29797, 272, 5146, 17715, 12354, 17721, 12338, 13105, 16709, 17217, 14386, 13122, 13879, 1042, 522, 28524, -8168, -23111, 1501, 288]

[[Uint8Array]]: Uint8Array(86) [248, 6, 9, 91, 75, 107, 252, 2, 49, 51, 248, 1, 248, 2, 52, 252, 69, 10, 53, 10, 27, 57, 49, 56, 50, 56, 53, 54, 49, 48, 56, 56, 55, 64, 115, 46, 119, 104, 97, 116, 115, 97, 112, 112, 46, 110, 101, 116, 16, 1, 26, 20, 51, 69, 66, 48, 57, 69, 50, 48, 49, 51, 69, 65, 65, 67, 50, 56, 66, 51, 55, 54, 18, 4, 10, 2, 108, 111, 24, 224, 185, 165, 221, 5, 32, 1]
byteLength: (...)
__proto__: ArrayBuffer

Answer 1

对于一个新的 ArrayBuffer 来说，它只是

 a = new ArrayBuffer(length)

如果您需要具有给定值的新缓冲区，则必须使用类型化数组或 View 才能操作其内容。例如 Uint8Array:

buffer = new ArrayBuffer(4);
view = new Uint8Array(buffer);
view.set([1,2,3,4]);
//or
buffer = Uint8Array.from([1,2,3,4]).buffer;

TypedArray#set()

TypedArray.from()