How to flush output of print?

[Ali Rezaee]

Hi,

I would like to show the progress of my Julia code while its running. But I do not want each different percent being printed in a different line in the command line.

Is there a way to print something and then remove it before a new item is printed?

Many thanks,

[René Donner]

You can see such behaviour implemented in https://github.com/timholy/ProgressMeter.jl (which might already do what you want ;-)

[Ali]

Thanks, René. That package does answer my need.

It would still be useful to know how to flush the output, just for the reference.

[Avik Sengupta]

If you look at the source of that package, it uses terminal escape characters to achieve this:

    print(io, "\u1b[1G")   # go to first column
    print_with_color(color, io, s)
    print(io, "\u1b[K")    # clear the rest of the line

[Ali]

Great. Thanks a lot.

[Tim Holy]

On Friday, May 08, 2015 12:44:12 PM Ali wrote:
> Thanks, René. That package does answer my need.
> It would still be useful to know how to flush the output, just for the
> reference.

To paraphrase Avik: "Use the source, Luke!" :-) Many of julia's packages are
quite readable (or become so, if you invest the time in getting good at it).
It's also one of the best ways to learn how to become good at writing julia
code. I've been doing this for several years now, and I still learn new things
that way on a near-weekly basis.

--Tim

[Ali]

Good advice, Tim. Thanks.