SYNOPSIS
mixed *map_objects(object *arr, string fun, mixed extra, ...)
DESCRIPTION
Similar to map_array(), but calls arr[n]->fun(extra,...). The
returned value replaces the object in returned array.
Any number of extra arguments is allowed, which are all
passed. 0-entries in arr are ignored.
SEE ALSO
map(E), filter(E), filter_objects(E)