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doc: document use of buffer.swap16() for utf16be #23747

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doc: document use of buffer.swap16() for utf16be
jasnell Oct 19, 2018
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8 changes: 8 additions & 0 deletions doc/api/buffer.md
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Expand Up @@ -1936,6 +1936,14 @@ buf2.swap16();
// Throws ERR_INVALID_BUFFER_SIZE
```

One convenient use of `buf.swap16()` is to perform a fast in-place conversion
between UTF-16 little-endian and UTF-16 big-endian:

```js
const buf = Buffer.from('This is little-endian UTF-16', 'utf16le');
buf.swap16(); // Convert to big-endian UTF-16 text.
```

### buf.swap32()
<!-- YAML
added: v5.10.0
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