From 0371e1546e272ffdf9c4db83ab2fe8bdf1d39943 Mon Sep 17 00:00:00 2001
From: Stephen Lynn <bizlsg@localhost.localdomain>
Date: Mon, 1 May 2023 17:35:35 +0800
Subject: challenge 215

---
 challenge-215/steve-g-lynn/perl/ch-1.pl | 31 ++++++++++++++++++++++
 challenge-215/steve-g-lynn/perl/ch-2.pl | 46 +++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+)
 create mode 100755 challenge-215/steve-g-lynn/perl/ch-1.pl
 create mode 100755 challenge-215/steve-g-lynn/perl/ch-2.pl

diff --git a/challenge-215/steve-g-lynn/perl/ch-1.pl b/challenge-215/steve-g-lynn/perl/ch-1.pl
new file mode 100755
index 0000000000..3a8107d6d1
--- /dev/null
+++ b/challenge-215/steve-g-lynn/perl/ch-1.pl
@@ -0,0 +1,31 @@
+#!/usr/bin/env -S perl -wl
+
+#-- this script conforms to perl 4 syntax as specified
+#-- in the 1st edition of Programming perl (pink camel)
+#
+
+local *odd_one_out = sub {
+  local (@words)=@_;
+  
+  local *is_sorted = sub { #not idiomatic but I prefer readable
+    local ($string)=@_;
+    local $chk=join('',sort {$a cmp $b} split(//,$string));
+    return ($string eq $chk);
+  };
+  
+  local ($ctr, $word, @retval); $ctr=0;
+  for $word (@words) {
+    if (&is_sorted($word)) {
+        push @retval, $word;
+    } 
+    else {
+        $ctr++;
+    }
+  }
+  print $ctr;
+  return @retval;
+};
+
+print &odd_one_out('abc','xyz','tsu'); 
+print &odd_one_out('rat','cab','dad');
+print &odd_one_out('x','y','z');
diff --git a/challenge-215/steve-g-lynn/perl/ch-2.pl b/challenge-215/steve-g-lynn/perl/ch-2.pl
new file mode 100755
index 0000000000..d3961b9789
--- /dev/null
+++ b/challenge-215/steve-g-lynn/perl/ch-2.pl
@@ -0,0 +1,46 @@
+#!/usr/bin/env -S perl -wl
+
+#this script conforms to perl 4 syntax
+#as specified in Programming perl 1st edition (the pink camel)
+
+local *number_placement=sub {
+    local ($count, @numbers)=@_;
+    
+    #-- helper sub-subs
+    local *is_conformant = sub { #-- all inputs 0 or 1 ?
+        local (@numbers) = @_;
+        local $number;
+        
+        for $number (@numbers) { 
+            ($number =~ /^0$/ || $number =~ /^1$/) || die "Non-conformant input";
+        }
+    }; 
+    
+    local *has_1_neighbor = sub {
+        local ($indx)=@_;
+        
+        ( ($indx > 0) && ($numbers[$indx-1] =~ /^1$/) )
+        || 
+        ( ($indx < @numbers-1) && ($numbers[$indx+1] =~ /^1$/ ));
+    };   
+    
+    #-- back to the main part of the subroutine
+    &is_conformant( @numbers );
+    
+    local ($indx,$ctr);
+    $ctr=0;
+    
+    for $indx (0 .. @numbers-1) {
+        ( ($numbers[$indx] =~ /^0$/) && (!(&has_1_neighbor($indx))) )
+        && ($ctr++);
+        
+        last if ($ctr >= $count); 
+    }
+    
+    ($ctr >= $count) ? 1 : 0;
+};
+
+print &number_placement(1,1,0,0,0,1);
+print &number_placement(2,1,0,0,0,1);
+print &number_placement(3,1,0,0,0,0,0,0,0,1);
+
-- 
cgit