Function: mapdelete
Section: programming/specific
C-Name: mapdelete
Prototype: vGG
Help: mapdelete(M,x): removes x from the domain of the map M.
Doc: removes $x$ from the domain of the map $M$.
\bprog
? M = Map(["a",1; "b",3; "c",7]);
? mapdelete(M,"b");
? Mat(M)
["a" 1]
["c" 7]
@eprog