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| irb(main):001:0> foo | |
| NameError: undefined local variable or method `foo' for main:Object | |
| from (irb):1 | |
| from /Users/dentarg/.rubies/ruby-2.2.10/bin/irb:11:in `<main>' | |
| irb(main):002:0> if false ; foo = 1 ; end | |
| => nil | |
| irb(main):003:0> foo | |
| => nil | |
| irb(main):004:0> bar | |
| NameError: undefined local variable or method `bar' for main:Object | |
| from (irb):4 | |
| from /Users/dentarg/.rubies/ruby-2.2.10/bin/irb:11:in `<main>' |
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