From eda05cc1e2f845b4e7c3eeea505c535432240197 Mon Sep 17 00:00:00 2001
From: Michael Williamson <mike@zwobble.org>
Date: Wed, 30 Mar 2016 14:16:10 +0100
Subject: Read extended operands in infix operations

---
 src/main/java/org/zwobble/couscous/util/Fold.java | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/main/java/org/zwobble/couscous/util/Fold.java')

diff --git a/src/main/java/org/zwobble/couscous/util/Fold.java b/src/main/java/org/zwobble/couscous/util/Fold.java
index e86454e..bda680d 100644
--- a/src/main/java/org/zwobble/couscous/util/Fold.java
+++ b/src/main/java/org/zwobble/couscous/util/Fold.java
@@ -2,6 +2,7 @@ package org.zwobble.couscous.util;
 
 import com.google.common.collect.Lists;
 
+import java.util.Iterator;
 import java.util.List;
 import java.util.function.BiFunction;
 
@@ -13,6 +14,14 @@ public class Fold {
         }
         return value;
     }
+    public static <T> T foldLeft(Iterable<T> iterable, BiFunction<T, T, T> function) {
+        Iterator<T> iterator = iterable.iterator();
+        T value = iterator.next();
+        while (iterator.hasNext()) {
+            value = function.apply(value, iterator.next());
+        }
+        return value;
+    }
 
     public static <T, V> V foldRight(List<T> iterable, V initialValue, BiFunction<V, T, V> function) {
         return foldLeft(Lists.reverse(iterable), initialValue, function);
-- 
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