March 2014 update

Task/Averages-Arithmetic-mean/D/averages-arithmetic-mean-2.d

@@ -1,7 +1,7 @@
 import std.stdio, std.algorithm, std.range;
 
 real mean(Range)(Range r) pure nothrow {
-    return reduce!q{a + b}(0.0L, r) / max(1.0L, r.count);
+    return r.sum / max(1.0L, r.count);
 }
 
 void main() {

Task/Averages-Arithmetic-mean/Dart/averages-arithmetic-mean.dart

@@ -0,0 +1,5 @@
+num mean(List<num> l) => l.reduce((num p, num n) => p + n) / l.length;
+
+void main(){
+  print(mean([1,2,3,4,5,6,7]));
+}

Task/Averages-Arithmetic-mean/Frink/averages-arithmetic-mean.frink

@@ -0,0 +1 @@
+mean[x] := length[x] > 0 ? sum[x] / length[x] : undef

Task/Averages-Arithmetic-mean/Maxima/averages-arithmetic-mean.maxima

@@ -1 +1,2 @@
+load("descriptive");
 mean([2, 7, 11, 17]);