CODEWITHSUNDEEP
rubyeval
user1134991
user1134991

Reputation: 3103

results of eval when used to define variables not seen in later lines

I am trying to assign a variable within eval, and then print it out. The code is:

eval "foo=nil"
puts foo

What I get is:

undefined local variable or method `foo' for main:Object (NameError)

When I use puts within the eval, I get no errors. This means that foo is scoped within the eval. How can I get it to be outside the eval scope, yet not as a global variable?

Upvotes: 0

Views: 82

Answers (1)

John C
John C

Reputation: 4396

I think foo is going out of scope in your eval.

if you declare it before your eval it will work ok. Eg;

foo='foo'
eval "foo=nil"
puts foo.to_s

output:

=> nil

Upvotes: 2

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