in reply to (Golf) Ordered Combinations

51 :-) 
#!/usr/bin/perl

sub c {my$n=-1+shift;$n?map{my$c=$_;map$c.$_,c($n,@_)}@_:@_};
sub d {my$n=shift;--$n?map{my$d=$_;map$d.$_,d($n,@_)}@_:@_};

print join " ", c qw(2 a b c);
print "\n";
print join " ", d qw(2 a b c);
print "\n";
print join " ", c qw(4 0 1);
print "\n";
print join " ", d qw(4 0 1);
print "\n";

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Re^2: (Golf) Ordered Combinations
by adolfoams@gmail.com (Initiate) on Aug 12, 2014 at 13:26 UTC
    Hi, i am trying following script to create 9 letter combination but not works...waiting for 8 hours but my computer keep no result. but 7 letter is still ok. Can someone help me to solve the issue? #!/usr/bin/perl sub c {my$n=-1+shift;$n?map{my$c=$_;map$c.$_,c($n,@_)}@_:@_}; print join " ", c qw(9 a b c d e f g h i); print "\n";
[reply]

      Howdy adolfo, welcome to the Monastery!

      In general, you'll have better luck posting your question as a new top-level post in Seekers of Perl Wisdom. Also, while you're at it, please use <code> tags to format your code; see Writeup Formatting Tips for more.

      Also: the particular solution to the "ordered combinations" problem here is a golfed solution, meaning that the aim was to use as few keystrokes as possible, at the expense of (among other things) readability, time and space complexity. Unless you're specifically interested in Perl golf, you're likely better off using a different solution.

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