Binding

Objects of class Binding encapsulate the execution context at some particular place in the code and retain this context for future use. The variables, methods, value of self, and possibly an iterator block that can be accessed in this context are all retained. Binding objects can be created using Kernel#binding, and are made available to the callback of Kernel#set_trace_func.

These binding objects can be passed as the second argument of the Kernel#eval method, establishing an environment for the evaluation.

class Demo
 def initialize(n)
 @secret = n
 end
 def get_binding
 binding
 end
end
k1 = Demo.new(99)
b1 = k1.get_binding
k2 = Demo.new(-3)
b2 = k2.get_binding
eval ("@secret", b1) #=> 99
eval ("@secret", b2) #=> -3
eval ("@secret") #=> nil

Binding objects have no class-specific methods.

Related methods