Don’t Forget To Flush…
No, not the toilet, your file streams. I was recently working on a project that involved creating a child process and reading its stdout to update the user inteface. Everything was working great until I sent it off to some testers who reporting that it ‘wasn’t working’ – the interface wasn’t updating correctly. I first thought it was a problem with the shell command itself, maybe it wasn’t performing the operation correctly and thus wasn’t sending the correct message through stdout but as far as I could tell everything was working perfectly. After about 3 hours of banging my head against the wall trying random things I finally thought to flush the stdout after sending my status message. It fixed it!..
Continue Reading