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author | 2023-07-26 14:59:39 -0700 | |
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committer | 2023-07-26 14:59:39 -0700 | |
commit | 4c89c60867591b50e0b31bf5009fd5ad6a3cebe1 (patch) | |
tree | fc1d2f47309c0345a850933496baa40d94bfdcbb /docs/guides/binary/arraybuffer-to-array.md | |
parent | 6bfee02301a2e2a0b79339974af0445eb5a2688f (diff) | |
download | bun-4c89c60867591b50e0b31bf5009fd5ad6a3cebe1.tar.gz bun-4c89c60867591b50e0b31bf5009fd5ad6a3cebe1.tar.zst bun-4c89c60867591b50e0b31bf5009fd5ad6a3cebe1.zip |
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diff --git a/docs/guides/binary/arraybuffer-to-array.md b/docs/guides/binary/arraybuffer-to-array.md new file mode 100644 index 000000000..688030b0a --- /dev/null +++ b/docs/guides/binary/arraybuffer-to-array.md @@ -0,0 +1,27 @@ +--- +name: Convert an ArrayBuffer to an array of numbers +--- + +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. + +```ts +const buf = new ArrayBuffer(64); +const arr = new Uint8Array(buf); +arr.length; // 64 +arr[0]; // 0 (instantiated with all zeros) +``` + +--- + +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.) + +```ts +const buf = new ArrayBuffer(64); +const uintArr = new Uint8Array(buf); +const regularArr = Array.from(uintArr); +// number[] +``` + +--- + +See [Docs > API > Binary Data](/docs/api/binary-data#conversion) for complete documentation on manipulating binary data with Bun. |