Well, I guess I spend about 15 minutes on your post. 15 minutes I could
not use answering other questions - either here or on comp.lang.perl.misc.
Testing, and then rejecting (but note you need to have decent knowledge
to come up with the right test cases...) an offered solution not only
takes time, it also decreases the overall percieved usefulness of this
site, and the helpfulness of the community.
A question left unanswered gives only minimal damage. Wrong or incomplete
answers are downright harmful.
As for Programming Perl, it writes:
If PATTERN is also omitted or is the literal space, " ",
the function splits on whitespace, /\s+/, after skipping
any leading whitespace.
To me, that seems to indicate Programming Perl describes exactly the
behaviour I mentioned.
Are you posting in the right place? Check out Where do I post X? to know for sure.
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Want more info? How to link or
or How to display code and escape characters
are good places to start.