From: Jean-Julien Fleck <jeanjulien.fleck@...>
Date: 2010-07-18T01:43:41+09:00
Subject: Re: Driving irb from IO.popen

Hello Robert,

> Note: << is more efficient than += here.

Yes. Bad habit on my side: I tend to find it more readable that way so
I don't use << so often. I should rather use it more to find it easier
to read :o)

Correct me if I'm wrong: << will append to the existing String object
whereas += will create a brand new String object by concatenating the
two (the old version and what I want to add), so it could be less
efficient if the string gets too long and/or if there are a lot of
line to append ?

> Not a workaround but a solution: since you only want to collect the output
> of irb and do not need to react on it you can simply use a second thread
> that collects all the output.

Thanks a lot, it works perfectly !

I don't need it now but as I have already been confronted to this
issue (finding workarounds as I had access to the other program and
could modify it), I'll ask anyway: how would you tackle the problem if
you did have to react to the output ? (just some hints would perfectly
please me)

Thanks again,

-- 
JJ Fleck
PCSI1 Lycée Kléber