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aux.pm
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aux.pm
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####################################################
## Name : aux module (auxiliary), under aux.pm ##
## Synopsis: Contains auxiliary functions ##
## Author : Ameer Abdelhadi ##
## ameer.abdelhadi@gmail.com ##
####################################################
package aux; # aux module definition
use strict; # Install all strictures
use FileHandle; # Use file handle, for dealing with files
use GraphViz; # Use graph visualization module
use warnings; # Show warnings
$|++; # Force auto flush of output buffer
#######################################################
## Synopsis: Returns min.max values of an array ##
## Input: Array of numbers ##
## Output: Two elements array, contains min/max ##
## Complexity: O(input array size) ##
#######################################################
sub minmax {
my ($package,@arr)=@_;
my $minval=$arr[0];
my $maxval=$arr[0];
## Iterate on array and update min/max
foreach my $val (@arr) {
if ($val<$minval) {
$minval=$val;
}
if ($val>$maxval) {
$maxval=$val;
}
}
## return min/max values
return ($minval,$maxval);
}
############################################################
## Synopsis: Sort & unify array (no repeated elements) ##
## Input: Array of numbers ##
## Output: Sorted and unified array ##
## Complexity: O(input array size) ##
############################################################
sub sort_uniq {
my ($package,@arr)=@_;
my @sorted_arr=sort {$a <=> $b} @arr; ## numerical sort
my @sorted_uniq_arr;
my $prev_val=undef;
## iterate on sorted array to remove repeated numbers
foreach my $val (@sorted_arr) {
unless ((defined $prev_val) && ($val == $prev_val)) {push(@sorted_uniq_arr,$val);}
$prev_val=$val;
}
return @sorted_uniq_arr;
}