Hi all,
In ruby we are having many methods to check whether the variable defined or not. Mostly we are using the following condition to check the variable defined or not
Code:
if local_variable
puts "local variable exists"
else
puts "local_variable does not exists"
end
But there is another way to check the variable defined or not.
sample-code:
a = 10
puts defined?(a).inspect => "local-variable"
puts defined?(b).inspect => nil
So, the method returns the value "local-variable" for the already defined variables and "nil" for the undefined variables.
Hope hereafter you guys using the method "defined?" to check the variable already defined or not.
Cheers,
Vadivelan
