#read IDs into %edges using match operator /(\S*)(\t)(\S*)/ and special variables $1, $3 for each ID per line
#assign IDs as format $edge{ID1,ID2}
#skip edge assignment if ID2,ID1 already exists .. the network needs to be undirected such that ID2-ID1 is equivalent to ID1-ID2 and should therefore not be counted twice
#populate hash of unique IDs from %edges
#create array of unique IDs from hash of unique IDs .... @uniqIDs, $uniqIDs[0]=ID1, uniqIDs[1]=ID2 etc .. how do i do this?
#initialize degree counter hash (IDs are keys, values are degrees) using @uniqIDs with foreach
#go through %edges and increment %counter for each ID
#generate random network with rand(int(scalar(@uniqIDs))), discard random picks if they already exist or represent undirected equivalent
#initialize random network degree counter hash, and then count random network degrees as before

##</code><code>##

my $filename = "edges.txt";   #Set a variable for our file name
open(my $fh, "<", $filename) or die "Can't open file $filename.";  #Open the file edges.txt
	while (<$fh>) {
  	if ($_ =~ m/(\S+)\t(\S+)/) {           #Match the IDs in the file to $1 and $2
		$edge{$1,$2}= $holder;             #assign IDs as format $edge{ID1,ID2}
close $fh;   #Close the file edges.txt
   my @list = keys %uniqedge;
   print "@list\n";          #Prints the list of keys, but they are uni-directional (i.e. repeated for ID1-ID2 and ID2-ID1)