functions - Refering to global variables inside modules

How do I refer to global variables inside modules if the same name is used for a local one? In code, I want that

proc[a_] := Module[{b},
  b = a;
  {"b" -> b}
  ]
b /. proc[1]

returns 1. Here "b" is to be replaced by the properly escaped global variable name.

Answer

Using Symbol is one way:

b = 10;
Module[{b},
 b = 5;
 Symbol["b"]
 ]
(* Out: 10 *)

Your example:

proc[a_] := Module[{b}, b = a;
  {Symbol["b"] -> b}]
b /. proc[1]
(* Out: 1 *)

Blog