Node.js solution for week 100, part 1

2 files changed, 33 insertions, 0 deletions

diff --git a/challenge-100/abigail/README.md b/challenge-100/abigail/README.md
index 7e4cf910e0..80fce6a337 100644
--- a/challenge-100/abigail/README.md
+++ b/challenge-100/abigail/README.md
@@ -23,6 +23,7 @@ Output: 07:15 pm or 07:15pm
 * [Befunge-93](befunge-93/ch-1.bf93)
 * [C](c/ch-1.c)
 * [Lua](lua/ch-1.lua)
+* [Node.js](node/ch-1.js)
 * [Perl](perl/ch-1.pl)
 
 ### Blog
diff --git a/challenge-100/abigail/node/ch-1.js b/challenge-100/abigail/node/ch-1.js
new file mode 100644
index 0000000000..d513e691e1
--- /dev/null
+++ b/challenge-100/abigail/node/ch-1.js
@@ -0,0 +1,32 @@
+#!/usr/local/bin/node
+
+//
+// See ../README.md
+//
+
+//
+// Run as: node ch-1.js < input-file
+//
+
+let printf = require ("printf")
+
+require ('readline')
+. createInterface ({input: process . stdin})   
+. on ('line', _ => {
+    //
+    // Parse data
+    //
+    let [m, hour, minute, ampm] = _ . match (/([0-9]+):([0-9]+)\s*([ap]?)/)
+
+    let new_ampm = ampm == "" ? hour >= 12 ? "pm" : "am" : ""
+
+    hour = hour % 12
+    if (ampm == "" && hour == 0) {
+        hour = 12
+    }
+    if (ampm == "p") {
+        hour += 12
+    }
+
+    printf (process . stdout, "%02d:%02d%s\n", hour, minute, new_ampm)
+});