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Document Buffer.concat zero-fill behavior #55562

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Dec 15, 2024
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3 changes: 2 additions & 1 deletion doc/api/buffer.md
Original file line number Diff line number Diff line change
Expand Up @@ -1042,7 +1042,8 @@ in `list` by adding their lengths.

If `totalLength` is provided, it is coerced to an unsigned integer. If the
combined length of the `Buffer`s in `list` exceeds `totalLength`, the result is
truncated to `totalLength`.
truncated to `totalLength`. If the combined length of the `Buffer`s in `list` is
less than `totalLength`, the remaining space is filled with zeros.

```mjs
import { Buffer } from 'node:buffer';
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