NAME
	map_mapping - map a mapping through a function

SYNOPSIS
	varargs mapping map_mapping(mapping map, mixed func, mixed ob,
					mixed args...)


DESCRIPTION
	Return a new mapping based on map filtered through the call
	ob->fun(value[i], args...). The indices will remain the same, but
	each value will be of the respective returnvalue of the map call.

NOTE
	Under DGD indices with values of 0 will be removed automatically
	in all mappings.

SEE ALSO
	efun/mappings/, macros/map_delete