Ruby

Consider this script:

Thread.current.thread_variable_set("ab", 12) puts Thread.current.thread_variable?("ab") puts Thread.current.thread_variable?(:ab) puts Thread.current.thread_variable?("ab") 

When I put the script above in a file and run it, I got three true as expected:

bash-3.2$ ruby test.rb true true true 

But when I copy each line to IRB, I got false on the first check:

bash-3.2$ irb irb(main):001:0> Thread.current.thread_variable_set("ab", 12) => 12 irb(main):002:0> puts Thread.current.thread_variable?("ab") false => nil irb(main):003:0> puts Thread.current.thread_variable?(:ab) true => nil irb(main):004:0> puts Thread.current.thread_variable?("ab") true => nil 

I expect it to print three true in IRB, just like when I run the script via file.