How to wait for process to finish using IO.popen?

Question

I\'m using IO.popen in Ruby to run a series of command line commands in a loop. I then need to run another command outside of the loop. The command outside of t

Answer 1

for foo in bar
  out = IO.popen(cmd_foo)
  out.readlines
end
IO.popen(another_cmd)

Reading the output to a variable then calling out.readlines did it. I think that out.readlines must wait for the process to end before it returns.

Credit to Andrew Y for pointing me in the right direction.