# HG changeset patch
# User Jordi Gutiérrez Hermoso <jordigh@octave.org>
# Date 1514929189 18000
# Node ID c64fab7ed515ffbd9404407682c5be10b2b1873e
# Parent  f2c11215006dcdf47aa62742afe03ad85657fd6f
day 23: moar functional (lol)

diff --git a/2017/day23.d b/2017/day23.d
--- a/2017/day23.d
+++ b/2017/day23.d
@@ -5,15 +5,10 @@
 
 import std.math: sqrt;
 import std.range: iota, stride;
-import std.algorithm: filter;
+import std.algorithm: filter, any;
 
 auto isComposite(long p) {
-  foreach(x; 2..sqrt(cast(double) p)) {
-    if (p % x == 0) {
-      return true;
-    }
-  }
-  return false;
+  return iota(2, sqrt(cast(double) p)).filter!(x => p % x == 0).any;
 }
 
 auto runProgram(string[] opcodes, bool shortcircuit=false) {