Perl/index.mdwn

   1
   2
   3 # Part 1
   4
   5
   6 [[!format txt """
   7 #!/usr/bin/perl
   8
   9 while(<>)
  10 {
  11         split;
  12         next unless ($_[0] > 0 and $_[0] < 31);
  13         $day = $_[0];
  14         $spread = $_[1] - $_[2];
  15         unless (defined $min_spread)
  16         {
  17                 $spread_day = $day;
  18                 $min_spread = $spread;
  19         }
  20         if ($spread <= $min_spread)
  21         {
  22                 $spread_day = $day;
  23                 $min_spread = $spread;
  24         }
  25 }
  26 print $spread_day, "\n";
  27 """]]
  28
  29 # Part 2
  30
  31
  32 [[!format txt """
  33 #!/usr/bin/perl
  34
  35 while(<>)
  36 {
  37         split;
  38         next unless ($_[0] > 0 and $_[0] < 21);
  39         $team = $_[1];
  40         $spread = abs($_[6] - $_[8]);
  41         unless (defined $min_spread)
  42         {
  43                 $spread_team = $team;
  44                 $min_spread = $spread;
  45         }
  46         if ($spread <= $min_spread)
  47         {
  48                 $spread_team = $team;
  49                 $min_spread = $spread;
  50         }
  51 }
  52 print $spread_team, "\n";
  53 """]]
  54
  55 # Part 3
  56
  57
  58 [[!format txt """
  59 #!/usr/bin/perl
  60
  61 sub dm($$$$)
  62 {
  63         my $file = shift;
  64         my $label_col = shift;
  65         my $alpha_col = shift;
  66         my $beta_col = shift;
  67
  68         my ($spread_label, $min_spread) = ("", 100000);
  69
  70         open (IN, "<$file");
  71         while(<IN>)
  72         {
  73                 split;
  74                 next unless ($_[$alpha_col] =~ /^[0-9]+/);
  75                 next unless ($_[$beta_col] =~ /^[0-9]+/);
  76                 my $label = $_[$label_col];
  77                 my $spread = abs($_[$alpha_col] - $_[$beta_col]);
  78                 unless (defined $min_spread)
  79                 {
  80                         print ".";
  81                         $spread_label = $label;
  82                         $min_spread = $spread;
  83                 }
  84                 if ($spread <= $min_spread)
  85                 {
  86                         $spread_label = $label;
  87                         $min_spread = $spread;
  88                 }
  89         }
  90         close (IN);
  91         $spread_label;
  92 }
  93
  94 print "part1: ", dm("../K4Weather.txt", 0, 1, 2), "\n";
  95 print "part2: ", dm("../K4Soccer.txt", 1, 6, 8), "\n";
  96 """]]
  97
  98
  99 ---
 100
 101  [[CategoryCodeSnippets|CategoryCodeSnippets]]