Node.js solutions for week 112

3 files changed, 50 insertions, 0 deletions

diff --git a/challenge-112/abigail/README.md b/challenge-112/abigail/README.md
index 83b5465420..f3d497b249 100644
--- a/challenge-112/abigail/README.md
+++ b/challenge-112/abigail/README.md
@@ -37,6 +37,7 @@ Output: "/a"
 * [Bash](bash/ch-1.sh)
 * [C](c/ch-1.c)
 * [Lua](lua/ch-1.lua)
+* [Node.js](node/ch-1.js)
 * [Perl](perl/ch-1.pl)
 
 ### Blog
@@ -57,6 +58,7 @@ This is just finding the `$n + 1` Fibonacci number.
 * [Bash](bash/ch-2.sh)
 * [C](c/ch-2.c)
 * [Lua](lua/ch-2.lua)
+* [Node.js](node/ch-1.js)
 * [Perl](perl/ch-2.pl)
 
 ### Blog
diff --git a/challenge-112/abigail/node/ch-1.js b/challenge-112/abigail/node/ch-1.js
new file mode 100644
index 0000000000..ce79942bfe
--- /dev/null
+++ b/challenge-112/abigail/node/ch-1.js
@@ -0,0 +1,28 @@
+#!/usr/local/bin/node
+
+//
+// See ../README.md
+//
+
+//
+// Run as: node ch-1.js < input-file
+//
+
+  require ('readline')
+. createInterface ({input: process . stdin})   
+. on ('line', _ => {
+    let parts = _ . split (/\/+/)              // Split on slash.
+    let parts2 = []
+    parts . every (_ => {
+        if (_ == "." || _ == "") {             // Skip current directory,
+            return true                        // and empty parts.
+        }
+        if (_ == "..") {                       // Pop parent directory.
+            parts2 . pop ()
+            return true
+        }
+        parts2 . push (_)                      // Copy part.
+        return true
+    })
+    console . log ("/" + parts2 . join ("/"))  // Print result.
+})
diff --git a/challenge-112/abigail/node/ch-2.js b/challenge-112/abigail/node/ch-2.js
new file mode 100644
index 0000000000..aa80e0970d
--- /dev/null
+++ b/challenge-112/abigail/node/ch-2.js
@@ -0,0 +1,20 @@
+#!/usr/local/bin/node
+
+//
+// See ../README.md
+//
+
+//
+// Run as: node ch-2.js < input-file
+//
+
+let cache = {0: 1, 1: 1}
+
+function fib (n) {
+    cache [n] = cache [n] || fib (n - 1) + fib (n - 2)
+    return cache [n]
+}
+
+  require ('readline')
+. createInterface ({input: process . stdin})   
+. on ('line', _ => console . log (fib (+ _)))