1 files changed, 18 insertions, 0 deletions
diff --git a/src/main/java/org/zwobble/couscous/util/ExtraLists.java b/src/main/java/org/zwobble/couscous/util/ExtraLists.java
new file mode 100644
index 0000000..b3c017f
--- /dev/null
+++ b/src/main/java/org/zwobble/couscous/util/ExtraLists.java
@@ -0,0 +1,18 @@
+package org.zwobble.couscous.util;
+
+import java.util.List;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+
+public class ExtraLists {
+    public static <T, R> R foldLeft(
+            List<T> list,
+            Function<T, R> initialValue,
+            BiFunction<R, T, R> function) {
+        R accumulator = initialValue.apply(list.get(0));
+        for (int index = 1; index < list.size(); index++) {
+            accumulator = function.apply(accumulator, list.get(index));
+        }
+        return accumulator;
+    }
+}