I'm learning some shell scripting on OS X using the tcsh shell.
For some reason... my while loop isn't executing right (or more likely I am doing something wrong.)
Something as simple as this doesn't work:
Code:
#!/bin/tcsh
set g = 0
while ($g <10)
echo "this" $g
@ g = $g + 1
end
By doesn't work, I mean it goes through the first time and then stops.
If I type it in to the terminal it works fine. But if I write it in a text editor (BBEdit) and save it as a script, then execute (after making it executable) it only goes through the first iteration.
The WEIRDEST part is that if I nest a while loop inside of it with the exact same syntax, the inner loop works correctly, while the outer loop still only goes through once.
I am writting a script in csh and I am blanking out on how I code in the ability to process user input in the middle of a while/end loop.
while(1)
args..
end
it is a simple script, and I want to add hotkey functions, like q to quit, z to zero counters, etc..
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Discussion started by: UBEE
3 Replies
LEARN ABOUT DEBIAN
poe::loop::tk
POE::Loop::Tk(3pm) User Contributed Perl Documentation POE::Loop::Tk(3pm)sub skip_tests {
return "Tk needs a DISPLAY (set one today, okay?)" unless (
(defined $ENV{DISPLAY} and length $ENV{DISPLAY}) or $^O eq "MSWin32"
);
my $test_name = shift;
if ($test_name eq "k_signals_rerun" and $^O eq "MSWin32") {
return "This test crashes Perl when run with Tk on $^O";
}
return "Tk tests require the Tk module" if do { eval "use Tk"; $@ };
my $m = eval { Tk::MainWindow->new() };
if ($@) {
my $why = $@;
$why =~ s/ at .*//;
return "Tk couldn't be initialized: $why";
}
return; }
NAME
POE::Loop::Tk - a bridge that allows POE to be driven by Tk
SYNOPSIS
See POE::Loop.
DESCRIPTION
POE::Loop::Tk implements the interface documented in POE::Loop. Therefore it has no documentation of its own. Please see POE::Loop for
more details.
POE::Loop::Tk is one of two versions of the Tk event loop bridge. The other, POE::Loop::TkActiveState accommodates behavior differences in
ActiveState's build of Tk. Both versions share common code in POE::Loop::TkCommon. POE::Loop::Tk dynamically selects the appropriate
bridge code based on the runtime environment.
SEE ALSO
POE, POE::Loop, Tk, POE::Loop::TkCommon, POE::Loop::PerlSignals.
AUTHORS & LICENSING
Please see POE for more information about authors, contributors, and POE's licensing.
perl v5.10.1 2010-04-11 POE::Loop::Tk(3pm)