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Re: array problem

by gav^ (Curate)
on Mar 15, 2002 at 02:03 UTC ( #151887=note: print w/replies, xml ) Need Help??

in reply to array problem

A quick perldoc -q shuffle array gives:
How do I shuffle an array randomly?
Use this: # fisher_yates_shuffle( \@array ) : # generate a random permutation of @array in place sub fisher_yates_shuffle { my $array = shift; my $i; for ($i = @$array; --$i; ) { my $j = int rand ($i+1); next if $i == $j; @$array[$i,$j] = @$array[$j,$i]; } } fisher_yates_shuffle( \@array ); # permutes @array in place
Other points to consider:
  • What on earth are you trying to do to $#arr?
  • You probably don't want to use @arr in the subsitution
  • You probably don't want to reinvent the wheel when there are perfectly good templating modules such as HTML::Template and Text::Template
  • splice wants an integer offset, rand returns a fractional number
  • print $_ is the same as print
I'm sure I've missed a few things. Sorry to sound overly harsh but I'm trying to be constructive :)


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