Terry Hancock <[EMAIL PROTECTED]> wrote:
> The only problem I see is the "in place" requirement, which seems silly
> unless by "quite large" you mean multiple gigabytes. Surely Perl
> actually makes a copy in the process even though you never see
> it?
If using "perl -i" then then it does make a copy
-i[extension]
specifies that files processed by the "<>" construct are to be
edited in-place. It does this by renaming the input file, opening
the output file by the original name, and selecting that output
file as the default for print() statements.
The solution posted previously using mmap actually does it in-place
though which will work very well for files < 4GB. (And not at all for
files > 4GB unless you are on a 64 bit machine).
--
Nick Craig-Wood <[EMAIL PROTECTED]> -- http://www.craig-wood.com/nick
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