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doc: clarify array args to Buffer.from() #48274

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Jun 2, 2023
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doc: clarify array args to Buffer.from() #48274

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45707ae
doc: clarify array args to Buffer.from()
bengl May 31, 2023
48769ec
fixup! doc: clarify array args to Buffer.from()
bengl Jun 1, 2023
2a6c6e0
fixup! fixup! doc: clarify array args to Buffer.from()
bengl Jun 1, 2023
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7 changes: 7 additions & 0 deletions doc/api/buffer.md
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Original file line number Diff line number Diff line change
Expand Up @@ -1118,6 +1118,12 @@ const { Buffer } = require('node:buffer');
const buf = Buffer.from([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]);
```

If `array` is an `Array`-like object (that is, one with a `length` property of
type `number`), it is treated as if it is an array, unless it is a `Buffer` or
a `Uint8Array`. This means all other `TypedArray` variants get treated as an
`Array`. To create a `Buffer` from the bytes backing a `TypedArray`, use
[`Buffer.copyBytesFrom()`][].

A `TypeError` will be thrown if `array` is not an `Array` or another type
appropriate for `Buffer.from()` variants.

Expand Down Expand Up @@ -5490,6 +5496,7 @@ introducing security vulnerabilities into an application.
[`Buffer.allocUnsafe()`]: #static-method-bufferallocunsafesize
[`Buffer.allocUnsafeSlow()`]: #static-method-bufferallocunsafeslowsize
[`Buffer.concat()`]: #static-method-bufferconcatlist-totallength
[`Buffer.copyBytesFrom()`]: #static-method-buffercopybytesfromview-offset-length
[`Buffer.from(array)`]: #static-method-bufferfromarray
[`Buffer.from(arrayBuf)`]: #static-method-bufferfromarraybuffer-byteoffset-length
[`Buffer.from(buffer)`]: #static-method-bufferfrombuffer
Expand Down