Beefy Boxes and Bandwidth Generously Provided by pair Networks
more useful options

Re: Problem running code until a user hits a key

by jasonk (Parson)
on Dec 30, 2007 at 15:50 UTC ( #659619=note: print w/replies, xml ) Need Help??

in reply to Problem running code until a user hits a key

Your second example is close, but you want to call ReadKey with a -1 instead of a 0, to tell Term::ReadKey not to block and wait for a key.

What you may want to consider though, is that by running in a tight loop like this you are going to suck up CPU time in a big way. For your purposes (collecting random data presumably from keystroke timings), you would probably be better of intentionally blocking and just keeping track of the times between the keystrokes, which would be much less CPU intensive.

use strict; use warnings; use Term::ReadKey; use Time::HiRes qw( gettimeofday ); ReadMode( 5 ); my $timings_needed = 15; my @timings = (); while ( $timings_needed-- ) { my $char = ReadKey(0); push( @timings, [ $char, gettimeofday() ] ); } for my $time ( @timings ) { print "@{ $time }\n"; } ReadMode( 0 );

We're not surrounded, we're in a target-rich environment!

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://659619]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others chanting in the Monastery: (5)
As of 2018-03-18 12:05 GMT
Find Nodes?
    Voting Booth?
    When I think of a mole I think of:

    Results (230 votes). Check out past polls.