1 files changed, 20 insertions, 0 deletions
diff --git a/app/assets/javascripts/lib/utils/array_utility.js b/app/assets/javascripts/lib/utils/array_utility.js
new file mode 100644
index 00000000000..197e7790ed7
--- /dev/null
+++ b/app/assets/javascripts/lib/utils/array_utility.js
@@ -0,0 +1,20 @@
+/**
+ * Return a shallow copy of an array with two items swapped.
+ *
+ * @param {Array} array - The source array
+ * @param {Number} leftIndex - Index of the first item
+ * @param {Number} rightIndex - Index of the second item
+ * @returns {Array} new array with the left and right items swapped
+ */
+export const swapArrayItems = (array, leftIndex = 0, rightIndex = 0) => {
+  const copy = array.slice();
+
+  if (leftIndex >= array.length || leftIndex < 0 || rightIndex >= array.length || rightIndex < 0) {
+    return copy;
+  }
+
+  const temp = copy[leftIndex];
+  copy[leftIndex] = copy[rightIndex];
+  copy[rightIndex] = temp;
+  return copy;
+};