diff -r 6d7aa8a1a3b3 -r f695ae118460 src/ucx/array.h
--- a/src/ucx/array.h	Thu Jul 04 22:23:15 2019 +0200
+++ b/src/ucx/array.h	Thu Jul 04 22:32:03 2019 +0200
@@ -158,6 +158,20 @@
  */
 int ucx_array_prepend(UcxArray *array, void *data);
 
+
+/**
+ * Sets an element at the specified index.
+ * 
+ * If the index is out of bounds, the array automatically grows.
+ * The pointer to the data may be NULL, in which case the element is zeroed. 
+ * 
+ * @param array a pointer the array where to set the data
+ * @param index the index of the element to set
+ * @param data a pointer to the data to insert (may be <code>NULL</code>)
+ * @return zero on success, non-zero if a reallocation was necessary but failed
+ */
+int ucx_array_set(UcxArray *array, size_t index, void *data);
+
 /**
  * Concatenates two arrays.
  *