From 1872d5b4c15c70325c8c958ff20fb7ee7223016c Mon Sep 17 00:00:00 2001
From: JAN VOJACEK <vojacekjan@hotmail.com>
Date: Sat, 21 Jul 2018 17:44:39 +0200
Subject: [PATCH] Slightly changed the way sigmoid is calculated due to
 unability to compile the old way.

---
 Sources/Activation.swift | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Sources/Activation.swift b/Sources/Activation.swift
index e76f024..9264624 100644
--- a/Sources/Activation.swift
+++ b/Sources/Activation.swift
@@ -302,7 +302,8 @@ public extension NeuralNet {
                     // TODO
                     break
                 case .sigmoid:
-                    result = zip(real, target).map{(-$0 * (1 - $0) * ($1 - $0))}
+                    let pairs = zip(real, target)
+                    result = pairs.map{(-$0 * (1 - $0) * ($1 - $0))}
                 case .softmax:
                     vDSP_vsub(target, 1,
                               real, 1,