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#load hash after some parsing in a foreach loop push(@{$jobs{$JobName}{1}}, $blah); ... $level++; $nextlevel++; }
job1, job2,job1, ... job6,jobz joba,job4,jobb jobz,jobbc,job2
while ($level <= 10) { foreach $dep (keys %jobs) { foreach (@{$jobs{$dep}{$level}}) { ... $level++; $nextlevel++; }