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doc: clarify out-of-bounds behavior of buf[index] #11286

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Mar 28, 2017
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doc: clarify out-of-bounds behavior of buf[index] #11286

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4 changes: 4 additions & 0 deletions doc/api/buffer.md
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Original file line number Diff line number Diff line change
Expand Up @@ -947,6 +947,10 @@ The index operator `[index]` can be used to get and set the octet at position
`index` in `buf`. The values refer to individual bytes, so the legal value
range is between `0x00` and `0xFF` (hex) or `0` and `255` (decimal).

This operator is inherited from `Uint8Array`, so its behavior on out-of-bounds
access is the same as `UInt8Array` - that is, getting returns `undefined` and
setting does nothing.

Example: Copy an ASCII string into a `Buffer`, one byte at a time

```js
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