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Re^2: detect input available from command line

by mifflin (Curate)
on Mar 11, 2011 at 16:49 UTC ( #892695=note: print w/ replies, xml ) Need Help??


in reply to Re: detect input available from command line
in thread detect input available from command line

I want to know when

while (<>) { }
has something available to read. I'd like to not execute this code when there isn't something available because it will block.

This idiom will read when @ARGV is populated or when there is some data available to read on STDIN.

I can handle detecting whether @ARGV has data. What I'm not sure on is how to detect whether STDIN has something available to read. Still testing but I'm not convinced, yet, that -t, as suggested by others, will work here.


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Re^3: detect input available from command line
by Anonymous Monk on Mar 11, 2011 at 17:13 UTC

    One thing you can do is start a second thread. Let that thread do the blocking read, and pass results to the main thread as they become available.

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