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Re^4: Little annoying mistakes ... of others

by jeffa (Bishop)
on Dec 29, 2008 at 14:16 UTC ( #733034=note: print w/replies, xml ) Need Help??

in reply to Re^3: Little annoying mistakes ... of others
in thread Little annoying mistakes ... of others

I think this:

print "$arg matches\n" if grep $arg, @valid;

Is equivalent to this:

print "$arg matches\n" if grep { $arg } @valid;
So as long as @valid and $arg are not false, then the match will also be true. (If $arg is 0 (zero) then the second example will not always be true.)


(the triplet paradiddle with high-hat)

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[Corion]: Meh. SQL window functions would even make pagination easy/trivial (but not performant), as rank() over (partition by user order by timestamp) / 10 as page would give me a page number for each item, with 10 items per page.
[Corion]: Of course, the query performance for "all items on page 10" is likely worse than rank() between 100 and 109 , but if that means I can write 15 lines of SQL instead of needing to think about how to partition things and how to encode the page size...
[Corion]: ... that would be nice. But alas, I'm currently tied to SQLite as minimum implementation, and it doesn't implement window functions :-(
[Corion]: And I'm not aware of any other serverless SQL implementation that even reaches the capability of SQLite, not to mention surpasses it

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