September 2017 Update

Task/Averages-Mean-time-of-day/JavaScript/averages-mean-time-of-day.js

@@ -0,0 +1,37 @@
+var args  = process.argv.slice(2);
+
+function time_to_seconds( hms ) {
+    var parts = hms.split(':');
+    if ( parts[0] < 12 ) {
+        parts[0] = 24;
+    }
+    var seconds = parseInt(parts[0]) * 60 * 60 + parseInt(parts[1]) * 60 + parseInt(parts[2]);
+    return seconds;
+}
+function seconds_to_time( s ) {
+    var h = Math.floor( s/(60 * 60) );
+    if ( h < 10 ) {
+        h = '0' + h;
+    }
+    s = s % (60 * 60);
+
+    var m = Math.floor( s/60 );
+    if ( m < 10 ) {
+        m = '0' + m;
+    }
+    s = s % 60
+    if ( s < 10 ) {
+        s = '0' + s;
+    }
+    return h + ':' + m + ':' + s;
+}
+
+var sum = 0, count = 0, idx;
+for (idx in args) {
+    var seconds = time_to_seconds( args[idx] );
+    sum += seconds;
+    count++;
+}
+
+var seconds = Math.floor( sum / count )
+console.log( 'Mean time is ', seconds_to_time(seconds));