in reply to Create unique array --the hard way!

Ah, I did it using the following code:
my @array_q3=(); #create the array to store all words in the file open INFILE3, "<file"; while( my $line3 = <INFILE3>) { chomp $line3; push @array_q3, $line3; } close INFILE3; #sort the array so we can identify the duplicates my @sorted_array_q3 = sort(@array_q3); my @unique_array; #iterate through the sorted array and check for unique elements foreach my $element ( @sorted_array_q3 ) { if ( ! grep( /$element/, @unique_array ) ) { push( @unique_array, $element ); } } #print the unique elements in the file clean.acc\n"; open OUTFILE3, ">unique_codes"; for (my $m=0; $m<=$#unique_array; $m++) { print OUTFILE3 $unique_array[$m]."\n"; } close OUTFILE3;

My problem here is with grep, since I seem to miss one element... The element has the code J00148 and apparently there is a conflict with another element, namely AJ001487.
What must I add in my grep conditional?

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Re^2: Create unique array --the hard way!
by Anonymous Monk on Mar 07, 2014 at 15:56 UTC
    Got it!
    if ( ! grep ( /^$element$/, @unique_array ) )

      Great that you found a solution yourself

      Since you didn't follow your own idea of using sorting to identify doubles the sort step is now useless.

      To follow your original plan you would have to do something like this:

      my $previous=""; foreach my $element ( @sorted_array_q3 ) { if ( $element ne $previous ) { push( @unique_array, $element ); } $previous= $element; }