Added public files
Roughly added all public files. Probably missed some, though.
diff --git a/doc/efun/transpose_array b/doc/efun/transpose_array
new file mode 100644
index 0000000..68e2a78
--- /dev/null
+++ b/doc/efun/transpose_array
@@ -0,0 +1,22 @@
+SYNOPSIS:
+ mixed *transpose_array (mixed *arr);
+
+DESCRIPTION:
+ transpose_array ( ({ ({1,2,3}), ({a,b,c}) }) )
+ == ({ ({1,a}), ({2,b)}, ({3,c}) })
+
+ transpose_array() applied to an alist results in an array of
+ ({ key, data }) pairs, useful if you want to use sort_array()
+ or filter() on the alist.
+
+EXAMPLE:
+ sort_array(transpose_array( ({ m_indices(map), m_values(map) }) ),
+ lambda( ({ 'a, 'b }),
+ ({ #'<, ({ #'[, 'a, 0 }),
+ ({ #'[, 'b, 0}) }) ) )
+
+ The given mapping 'map' is returned as an array of
+ ({ key, data }) pairs, sorted by the keys.
+
+SEE ALSO:
+ alists(LPC), sort_array(E)