Ruby Variable Scope - TechotopiaA class variableIn addition, Ruby has two pseudo-variables which cannot be assigned values. These are nil which is assigned to uninitialized variables and self which refers to the currently executing object. In the remainder of this chapter we will look at each of these variable scopes in turn. Detecting the Scope of a Ruby VariableObviously, you can tell the scope of a variable by looking at the
逆引きRuby – www.namaraii.com – Index of TAKEUCHI, Hitoshi
Class variable - Wikipedia
