1 files changed, 25 insertions, 20 deletions
diff --git a/006/ch1.pl b/006/ch1.pl
index 5ec9203..bac675c 100755
--- a/006/ch1.pl
+++ b/006/ch1.pl
@@ -1,34 +1,39 @@
 #!/usr/bin/env perl
+#
+# Create a script which takes a list of numbers from command line and print the
+# same in the compact form. For example, if you pass “1,2,3,4,9,10,14,15,16”
+# then it should print the compact form like “1-4,9,10,14-16”
+################################################################################
 
 use strict;
 use warnings;
 
 sub compact {
-	my @ns = split(/,/, shift);
-	my $from = my $to = shift @ns; # The first interval is the first number
-	my @intervals;
+    my @ns = split(/,/, shift);
+    my $from = my $to = shift @ns; # The first interval is the first number
+    my @intervals;
 
-	# Store the current interval ($from, $to) and advance to the next one
-	my $save = sub {
-		push(@intervals, $from == $to ? $from : "$from-$to");
-		$from = $to = shift;
-	};
+    # Store the current interval ($from, $to) and advance to the next one
+    my $save = sub {
+        push(@intervals, $from == $to ? $from : "$from-$to");
+        $from = $to = shift;
+    };
 
-	# Iterate over the numbers, expanding the last interval or starting a new one
-	foreach my $n (@ns) {
-		if ($to == $n-1) {
-			$to = $n;
-		} else {
-			&$save($n);
-		}
-	}
+    # Iterate over the numbers, expanding the last interval or starting a new one
+    foreach my $n (@ns) {
+        if ($to == $n-1) {
+            $to = $n;
+        } else {
+            &$save($n);
+        }
+    }
 
-	# Store the last interval (except for empty input)
-	&$save if defined $to;
+    # Store the last interval (except for empty input)
+    &$save if defined $to;
 
-	return join(",", @intervals);
+    return join(",", @intervals);
 }
 
 foreach (@ARGV) {
-	print compact($_), "\n";
+    print compact($_), "\n";
 }