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This really takes two passes unless you want to load the whole thing into memory. The first pass counts how many words there are corresponding to each letter, and the second pass retrieves the chosen words from the file.
use strict; use warnings; my ($words, $file, $handle, %range, %c, %n, $c, @words); $words = 100; $file = 'dictionary.txt'; $range{$_} = () for 'a'..'z'; open ($handle, $file); while (<$handle>) { $c = substr($_, 0, 1); next if !exists $range{$c}; $c{$c}++; } close ($handle); for (values %c) { choose($_); } open ($handle, $file); while (<$handle>) { $c = substr($_, 0, 1); next if !exists $c{$c} || $n{$c}++ < $c{$c}[-1]; chomp; push @words, $_; pop @{$c{$c}}; delete $c{$c} if $#{$c{$c}} == -1; } close ($handle); print join "\n", sort @words; ### Pick random numbers in range sub choose { my @c = 0..($_[0]-1); for (0..($words-1)) { swap(\@c, $_, rand ($_[0] - $_) + $_); } $_[0] = [sort {$b <=> $a} @c[0..($words-1)]]; } ### Swap two array items sub swap { my ($r, $x, $y, $t) = @_; $t = $r->[$x]; $r->[$x] = $r->[$y]; $r->[$y] = $t; }

In reply to Re: improving the efficiency of a script by TedPride
in thread improving the efficiency of a script by sulfericacid

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