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Re^3: palindrome using regular expressions

by Hofmator (Curate)
on Oct 10, 2006 at 12:11 UTC ( #577386=note: print w/replies, xml ) Need Help??


in reply to Re^2: palindrome using regular expressions
in thread palindrome using regular expressions

Yes, you are absolutely right. Thanks for the correction.

In fact, I also thought that reverse worked on strings and so I tried print reverse 'hello' which returns hello. From that I (incorrectly) concluded that it doesn't work ... well, got bitten by list context again, print scalar reverse 'hello' does the job OK :)

-- Hofmator

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Re^4: palindrome using regular expressions
by strat (Canon) on Oct 11, 2006 at 07:58 UTC

    exactly.

    reverse is aware of its context; if you use it in string context ($reverse = reverse ...), it reverses the string; but if you use it in list context (print reverse ... or @array = reverse ..), it reverses the list (and does nothing if the list only has one element

    Best regards,
    perl -e "s>>*F>e=>y)\*martinF)stronat)=>print,print v8.8.8.32.11.32"

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[erix]: it has TOP, IIRC
[Corion]: erix: Ah. I use where 1 = 0 for queries where I only am interested in the structure ;)
[erix]: 1=0 is as short as TOP :)
[erix]: "code of someone that died" -- kinda nice if your code stops working too
[erix]: hard to implement, hmm
[Corion]: erix: Well, they also seem to have changed the server, or some software, or whatever, and seem to be in the process of changing the DB schema from having the "username" as primary key to something else.
[Corion]: Far too many things being done at once, or maybe only now has it become apparent that nobody knows that piece of software anymore

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