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Perhaps this will be suitable (for your class exercise):

#!/usr/bin/env perl -l use strict; use warnings; my @initial = qw{q w e r t y q w e r t y}; print "Initial: @initial"; my $last = ''; my @unique = map { $last eq $_ ? () : ($last = $_) } sort @initial; print "Unique: @unique";


Initial: q w e r t y q w e r t y Unique: e q r t w y

Update (alternative solution): You could even skip the creation of the unsorted array (your @array_q3):

#!/usr/bin/env perl -l use strict; use warnings; my $last = ''; my @unique = map { $last eq $_ ? () : ($last = $_) } sort map { split +} <DATA>; print "Unique: @unique"; __DATA__ I am supposed to create a unique array I am not supposed to use hashes


Unique: I a am array create hashes not supposed to unique use

-- Ken

In reply to Re: Create unique array --the hard way! by kcott
in thread Create unique array --the hard way! by Anonymous Monk

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