How to print stdout immediately?

Question

How can I immediately output stdout? stdout is going to print after all input is complete.

require \'open3\'
def run(cmd)
    Open3         


        

Answer 1

Flush the output

What you are looking for is to flush the io stream by using the flush method.

Try the following after each iteration or each puts:

stdout.flush

If you had multiple puts in a row, I would suggest doing a flush after the last one, so you do not do it too often. Example:

stdout.puts "Hello"
stdout.puts "Mate"
stdout.flush