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→Detecting the Scope of a Ruby Variable
== Detecting the Scope of a Ruby Variable ==
Obviously, you can tell the scope of a variable by looking at the name. Sometime, you need to find out the scope programmatically. A useful technique to find out the scope of a variable is to use the ''defined?'' method. ''defined?'' will return the scope of the variable referenced, or ''nil'' if the variable is not defined in the current context:
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