Answers uploaded for ch037

2 files changed, 122 insertions, 0 deletions

diff --git a/challenge-037/saiftynet/perl5/ch-1.pl b/challenge-037/saiftynet/perl5/ch-1.pl
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+++ b/challenge-037/saiftynet/perl5/ch-1.pl
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+#!/usr/env perl
+# weekdays in month
+# Challenge 1 week 37
+
+use strict;
+use warnings;
+use DateTime;
+ 
+my $dt = DateTime->new(            # start at first day of the year
+    year       => 2019,
+    month      => 1,
+    day        => 1,);
+    
+my %counters;                      # set up weekday counters
+
+while ($dt->year() ==2019){        # Until the year is over
+  $counters{$dt->month()}+=1       # add to each month's counter
+     if ($dt->day_of_week() <6);   # if the day is a week day. 
+  $dt->add( days => 1 )            # Get next day
+}
+
+print "Answer to 1st Challenge of week 37\nIn 2019\n";
+for (1..12){                       # now print out each month
+   print qw/Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec/[$_-1].
+         " has " .$counters{$_} . " Weekdays \n"; # and its weeday counts
+}
+
+#Output
+#Answer to 1st Challenge of week 37
+#In 2019
+#Jan has 23 Weekdays 
+#Feb has 20 Weekdays 
+#Mar has 21 Weekdays 
+#Apr has 22 Weekdays 
+#May has 23 Weekdays 
+#Jun has 20 Weekdays 
+#Jul has 23 Weekdays 
+#Aug has 22 Weekdays 
+#Sep has 21 Weekdays 
+#Oct has 23 Weekdays 
+#Nov has 21 Weekdays 
+#Dec has 22 Weekdays 
+
+
diff --git a/challenge-037/saiftynet/perl5/ch-2.pl b/challenge-037/saiftynet/perl5/ch-2.pl
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+#!/usr/env perl
+# Daylight Hours
+# Challenge 2 Week 37
+
+use strict;
+use warnings;
+
+use LWP::Simple qw(get); 
+
+my $difference=getDayLight( country=>"uk", city =>"london", month =>"11", year =>"2019", ) -
+               getDayLight( country=>"uk", city =>"london", month =>"12", year =>"2019", );
+               
+print "\n\nThe difference in daylight is ".s2hms($difference)."(Hours:Minutes:Seconds)\n";     
+     
+sub s2hms{                    # converts seconds to days hours minutes and seconds
+	my $time=shift;
+	my $sec=$time%60;
+	$time=($time-$sec)/60;
+	my $min=$time%60;
+	$time=($time-$min)/60;
+	my $hrs=$time%24;
+	my $days=($time-$hrs)/24;
+	return ($days?"$days days ":"").sprintf "%d:%02d:%02d",$hrs,$min,$sec;
+	
+}
+
+sub hms2s{
+	my($hours,$mins,$secs)=split /:/, shift;
+	return 3600*$hours+60*$mins+$secs;
+
+}
+
+sub getDayLight{            #return total number of seconds of daylight;
+	my %data=@_;
+	my $url = "https://www.timeanddate.com/sun/$data{country}/$data{city}?month=$data{month}&year=$data{year}";
+	print "According to \n  $url \n";
+	my $html = get $url;
+
+	$html=~s/^.+<tbody>//s;		#remove everything before the table body    
+	$html=~s/<\/tbody>.*$//s;	#remove everything after  the table body
+	$html=~s/<\/tr>/-\n/gs;		#each row of table in new line, remove row tags
+	$html=~s/<\/?t[^>]+>/_/gs;	#replace each tag with '_'
+	$html=~s/<\/?s[^>]+>//gs;	#span tags are not useful
+	$html=~s/&#8722;/\-/gs;		#html minus charcode to be replaced with -
+	$html=~s/&43;/\+/gs;		#html plus  charcode to be replaced with +  
+	
+	my @tt; 				    #array containing each day of the month		
+	foreach my $line(split/\n/, $html){  #converts row into hash
+		my @tmp=split /__/,$line;shift @tmp; my $dt=shift @tmp; my %ttmp;
+		@ttmp{qw/sr ss dl dld ATS ATE NTS NTE CTS CTE noon MKm/}=@tmp;
+		$tt[$dt]=\%ttmp;		#put each row hash into the date		
+	}
+	
+	my $dlSum=0;				# the accumulator for the daylight time
+
+	foreach my $date (1..$#tt){ #for each date collected
+		$dlSum+=hms2s($tt[$date]{dl}); #get the daylight time converted to seconds
+	}
+								#spit out the time 
+	print   "  There are ".s2hms($dlSum) . " of daylight in\n  ".
+	        ucfirst($data{city})." during month $data{month}, year $data{year}\n"; 
+	return  $dlSum; 
+}
+
+# output is: -
+#
+# According to 
+#  https://www.timeanddate.com/sun/uk/london?month=11&year=2019 
+#  There are 11 days 3:00:40 of daylight in
+#  london during month 11, year 2019
+# According to 
+#  https://www.timeanddate.com/sun/uk/london?month=12&year=2019 
+#  There are 10 days 5:45:01 of daylight in
+#  london during month 12, year 2019
+#
+#
+# The difference in daylight is 21:15:39(Hours:Minutes:Seconds)
+