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Re: reversed hash doesn't identify keys

by roboticus (Canon)
on Dec 11, 2012 at 22:33 UTC ( #1008415=note: print w/ replies, xml ) Need Help??


in reply to reversed hash doesn't identify keys

holly71:

If you want to reverse the letter order in a word, you can do that by splitting the word into characters (via split), and then rejoin them in the correct order:

# Take a word my $word = "Constantinople"; # Split into letters: my @letters = split '', $word; # Reverse them my @srettel = reverse @letters; # Join back into a single word: my $drow = join('', @srettel);

Of course, you can combine it all into a single step:

my $drow = join('', reverse split //, "Constantinople");

Update: Or you could (as johngg pointed out) just use reverse, and it'll do the job without all the hoop-jumping-through-stuff.

...roboticus

When your only tool is a hammer, all problems look like your thumb.


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Re^2: reversed hash doesn't identify keys
by johngg (Abbot) on Dec 11, 2012 at 23:22 UTC

    reverse works on scalar strings as well!

    $ perl -Mstrict -Mwarnings -E ' > my $word = q{Constantinople}; > my $drow = reverse $word; > say $drow;' elponitnatsnoC $

    I hope this is of interest.

    Cheers,

    JohnGG

      johngg:

      I've been writing perl for a good while now, and I'm frequently surprised at what I don't know.

      ...roboticus

      When your only tool is a hammer, all problems look like your thumb.

      Thanks very much! I had one too many "reverse"s in there and it was reversing the reversed letters back...

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