Ruby solutions for week 137

2 files changed, 71 insertions, 0 deletions

diff --git a/challenge-137/abigail/ruby/ch-1.rb b/challenge-137/abigail/ruby/ch-1.rb
new file mode 100644
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+++ b/challenge-137/abigail/ruby/ch-1.rb
@@ -0,0 +1,41 @@
+#!/usr/bin/ruby
+
+#
+# See ../README.md
+#
+ 
+#
+# Run as: ruby ch-1.rb
+#
+
+
+start_years       = [1600, 2000]
+long_year_offsets = [
+      4,      9,     15,     20,     26,
+     32,     37,     43,     48,     54,
+     60,     65,     71,     76,     82,
+     88,     93,     99,            
+            105,    111,    116,    122,
+    128,    133,    139,    144,    150,
+    156,    161,    167,    172,    178,
+    184,    189,    195,            
+            201,    207,    212,    218,
+    224,    229,    235,    240,    246,
+    252,    257,    263,    268,    274,
+    280,    285,    291,    296,    
+                    303,    308,    314,
+    320,    325,    331,    336,    342,
+    348,    353,    359,    364,    370,
+    376,    381,    387,    392,    398
+]
+
+start_years . each do 
+    | start_year |
+    long_year_offsets . each do
+        | offset |
+        year = start_year + offset
+        if 1900 <= year and year <= 2100 then
+            puts (year)
+        end
+    end
+end
diff --git a/challenge-137/abigail/ruby/ch-2.rb b/challenge-137/abigail/ruby/ch-2.rb
new file mode 100644
index 0000000000..ed5b73c51f
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+++ b/challenge-137/abigail/ruby/ch-2.rb
@@ -0,0 +1,30 @@
+#!/usr/bin/ruby
+
+#
+# See ../README.md
+#
+ 
+#
+# Run as: ruby ch-2.rb < input-file
+#
+
+def reverse (num)    
+    rev = 0
+    while num > 0 do
+        rev *= 10
+        rev += num % 10
+        num /= 10
+    end
+    return rev
+end
+
+def ly (num)
+    return num >= 10000000      ? 1
+         : num == reverse(num) ? 0
+         : ly(num + reverse(num))
+end
+
+ARGF . each_line do
+    | number |
+    puts (ly(number . to_i))
+end