Ruby solutions for week 112

3 files changed, 51 insertions, 0 deletions

diff --git a/challenge-112/abigail/README.md b/challenge-112/abigail/README.md
index 4b619db213..2b454118bb 100644
--- a/challenge-112/abigail/README.md
+++ b/challenge-112/abigail/README.md
@@ -40,6 +40,7 @@ Output: "/a"
 * [Node.js](node/ch-1.js)
 * [Perl](perl/ch-1.pl)
 * [Python](python/ch-1.py)
+* [Ruby](ruby/ch-1.rb)
 
 ### Blog
 
@@ -62,5 +63,6 @@ This is just finding the `$n + 1` Fibonacci number.
 * [Node.js](node/ch-1.js)
 * [Perl](perl/ch-2.pl)
 * [Python](python/ch-2.py)
+* [Ruby](ruby/ch-1.rb)
 
 ### Blog
diff --git a/challenge-112/abigail/ruby/ch-1.rb b/challenge-112/abigail/ruby/ch-1.rb
new file mode 100644
index 0000000000..e26463cb68
--- /dev/null
+++ b/challenge-112/abigail/ruby/ch-1.rb
@@ -0,0 +1,27 @@
+#!/usr/bin/ruby
+
+#
+# See ../README.md
+#
+ 
+#
+# Run as: ruby ch-1.rb < input-file
+#
+
+ARGF . each_line do
+    | line |
+    parts = line . strip() . split (/\/+/)
+    parts2 = []
+    parts . each do
+        | part |
+        if part == "" or part == "."   # Skip empty parts and current directory
+            next
+        end
+        if part == ".."                # Remove parent directory
+            parts2 . pop
+            next
+        end
+        parts2 . push (part)           # Add part
+    end
+    puts ("/" + parts2 . join("/"))    # Print result
+end
diff --git a/challenge-112/abigail/ruby/ch-2.rb b/challenge-112/abigail/ruby/ch-2.rb
new file mode 100644
index 0000000000..68c59fef40
--- /dev/null
+++ b/challenge-112/abigail/ruby/ch-2.rb
@@ -0,0 +1,22 @@
+#!/usr/bin/ruby
+
+#
+# See ../README.md
+#
+ 
+#
+# Run as: ruby ch-1.rb < input-file
+#
+
+$cache = {}
+$cache [0] = 1
+$cache [1] = 1
+
+def fib (n)
+    $cache [n] ||= fib(n - 1) + fib(n - 2)
+end
+
+ARGF . each_line do
+    | n |
+    puts (fib(n . to_i))
+end