Extract forEach over two iterabes

1 files changed, 18 insertions, 0 deletions

diff --git a/src/main/java/org/zwobble/couscous/util/ExtraIterables.java b/src/main/java/org/zwobble/couscous/util/ExtraIterables.java
new file mode 100644
index 0000000..9cdb0f0
--- /dev/null
+++ b/src/main/java/org/zwobble/couscous/util/ExtraIterables.java
@@ -0,0 +1,18 @@
+package org.zwobble.couscous.util;
+
+import java.util.Iterator;
+
+public class ExtraIterables {
+    private ExtraIterables() {}
+
+    public static <T, U> void forEach(Iterable<? extends T> first, Iterable<? extends U> second, Action2<T, U> action) {
+        Iterator<? extends T> firstIterator = first.iterator();
+        Iterator<? extends U> secondIterator = second.iterator();
+        while (firstIterator.hasNext()) {
+            action.run(firstIterator.next(), secondIterator.next());
+        }
+        if (secondIterator.hasNext()) {
+            throw new RuntimeException("Iterables not of same length");
+        }
+    }
+}