+---
+
+-- Setup methods from array_base
+for method, f in pairs(array_base) do
+ local base_method = f;
+ -- Setup global array method which makes new array
+ array[method] = function (old_a, ...)
+ local a = new_array();
+ return base_method(a, old_a, ...);
+ end
+ -- Setup per-array (mutating) method
+ array_methods[method] = function (self, ...)
+ return base_method(self, self, ...);
+ end
+end
+