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With arrays for ordering instead of IxHashes:

#!/usr/bin/perl use warnings; use strict; my %hash; my @projects; my %vitems; while (my $buf = <DATA>) { chomp($buf); my ($vitem, $project_info) = split(/,/, $buf); my ($project_name, $segment_info) = split(/\|/, $project_info); my (@segments) = split(/;/, $segment_info); push @projects, $project_name unless exists $hash{$project_name}; push @{$vitems{$project_name}}, $vitem; push(@{$hash{$project_name}{$vitem}}, @segments); } for my $proj (@projects) { print "Project: $proj\n"; for my $vi (@{$vitems{$proj}}) { print " VItem: $vi\n"; for my $seg (@{$hash{$proj}{$vi}}) { print " Segment: $seg\n"; } } } exit(0); # ----------- __DATA__ J_071117,BM:3|12.0-25.2;32.9-88.0 J_070424,BM:3|625-920;1017.905-1178 J_021212,BB:1|123-166;409-455 070526,SWT:1|53.160-59.320;77.720-86.120;370.800-416.800 070609,SWT:1|713.760-1159.200 070616a,SWT:1|0.0-652.0 070616b,SWT:1|401.40-461.800;483.160-490.640;503.400-595.200;602.440-6 +95.400;699.200-882.400 J_071019a,SWT:1|372.925-910.385;927.620-1038.830 J_071019b,SWT:1|268.15-808.330 J_071025,SWT:1|936.215-1659.635 071123_F,SWT:1|45.4550-81.665

In reply to Re^2: How to Order an Array's Elements to Match Another Array's Element Order by hippo
in thread How to Order an Array's Elements to Match Another Array's Element Order by ozboomer

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