- Inheritance
- < Object
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 getBinding
return binding()
end
end
k1 = Demo.new(99)
b1 = k1.getBinding
k2 = Demo.new(-3)
b2 = k2.getBinding
eval("@secret", b1) #=> 99
eval("@secret", b2) #=> -3
eval("@secret") #=> nil
Binding objects have no class-specific methods.
Methods
Instance
| Visibility | Signature |
|---|---|
| public | clone () |
| public | eval (...) |
Instance Method Detail
clone()
MISSING: documentation
binding.eval(string [, filename [,lineno]]) => obj
Evaluates the Ruby expression(s) in string, in the binding‘s context. If the optional filename and lineno parameters are present, they will be used when reporting syntax errors.
def getBinding(param)
return binding
end
b = getBinding("hello")
b.eval("param") #=> "hello"