NAME
	filter_mapping - filter a mapping through a function

SYNTAX
	mapping filter_mapping(mapping map,function fun,mixed args...);
	mapping filter_mapping(mapping map,string fun,mixed args...);
	mapping filter_mapping(mapping map,-1,mixed args...);

DESCRIPTION
	Works exactly like filter_array, but works on a mapping.

SEE ALSO
	filter_array, map_mapping
