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| Forrige < |
Innhold ^
|
Neste >
|
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| klassen Binding |
|
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
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def initialize(n)
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@secret = n
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end
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def getBinding
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return binding()
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end
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end
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k1 = Demo.new(99)
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b1 = k1.getBinding
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k2 = Demo.new(-3)
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b2 = k2.getBinding
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eval("@secret", b1)
|
» |
99
|
eval("@secret", b2)
|
» |
-3
|
eval("@secret")
|
» |
nil
|
| Forrige < |
Innhold ^
|
Neste >
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