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doc: added what buf.copy returns 

as of https://github.com/nodejs/node/blob/v5.x/src/node_buffer.cc#L555

buf.copy returns the number of bytes copied.

PR-URL: https://github.com/nodejs/node/pull/3555
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
pull/3555/merge
Manuel B 2015-10-28 01:39:23 +01:00 committed by James M Snell
parent 934149a808
commit 3c56d5e9e3
1 changed files with 2 additions and 0 deletions
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doc/api/buffer.markdown
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@ -232,6 +232,8 @@ if the target memory region overlaps with the source. If `undefined` the
`targetStart` and `sourceStart` parameters default to `0` while `sourceEnd`
defaults to `buffer.length`.
Returns the number of bytes copied.
Example: build two Buffers, then copy `buf1` from byte 16 through byte 19
into `buf2`, starting at the 8th byte in `buf2`.