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30 lines
1.1 KiB
Plaintext
30 lines
1.1 KiB
Plaintext
---
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title: Convert an ArrayBuffer to an array of numbers
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sidebarTitle: "ArrayBuffer to Array"
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mode: center
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---
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To retrieve the contents of an `ArrayBuffer` as an array of numbers, create a [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) over of the buffer. and use the [`Array.from()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from) method to convert it to an array.
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```ts
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const buf = new ArrayBuffer(64);
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const arr = new Uint8Array(buf);
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arr.length; // 64
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arr[0]; // 0 (instantiated with all zeros)
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```
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---
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The `Uint8Array` class supports array indexing and iteration. However if you wish to convert the instance to a regular `Array`, use `Array.from()`. (This will likely be slower than using the `Uint8Array` directly.)
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```ts
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const buf = new ArrayBuffer(64);
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const uintArr = new Uint8Array(buf);
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const regularArr = Array.from(uintArr);
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// number[]
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```
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---
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See [Docs > API > Binary Data](/runtime/binary-data#conversion) for complete documentation on manipulating binary data with Bun.
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