Syntax
#(undef,%obj)
%obj is the object to be undefined.
Any object can be undefined using undef. When an object is undefined, it is freed and no longer available to the program. When an object, such as a dictionary, procedure, or an array, which contains other objects, is undefined, all objects it contains are undefined as well.
Example
#(def,a-string,abcd) #(def?,a-string,yes,no) yes #(undef,a-string) #(def?,a-string,yes,no) no #(dict,a-dict) #(def,a-dict.a-string,wxyz) #(def?,a-dict.a-string,yes,no) yes #(undef,a-dict) #(def?,a-dict.a-string,yes,no) no