bug in perl

[robin]

print "Sleep\n"; #string with newline
sleep 1;

print "Sleep"; #string without newline
sleep 1;

# in the first example, everything is fine and dandy.
#
# in the second example perl appears to be sleeping before executing
the second print command to print "sleep" without the newline.

#is this a bug in perl or something I'm just missing?


#robin
#[email protected]

 

[Sherm Pendley]

print "Sleep\n"; #string with newline
sleep 1;

print "Sleep"; #string without newline
sleep 1;

# in the first example, everything is fine and dandy.
#
# in the second example perl appears to be sleeping before executing
the second print command to print "sleep" without the newline.

Try it in a debugger, you can easily see that's not what's happening.

#is this a bug in perl or something I'm just missing?

It's something you're missing. Perl's output is buffered - that is, output
is stored into a buffer until the buffer is flushed. By default, the buffer
is flushed whenever a newline is inserted into the output stream, so the
effect is to send a full line of output at a time.

You can enable auto-flushing, so the output buffer is automatically flushed
after each output statement. Have a look at the description of the $| variable
in "perldoc perlvar".

sherm--

 

[Tintin]

print "Sleep\n"; #string with newline
sleep 1;

print "Sleep"; #string without newline
sleep 1;

# in the first example, everything is fine and dandy.
#
# in the second example perl appears to be sleeping before executing
the second print command to print "sleep" without the newline.

#is this a bug in perl or something I'm just missing?

My GOD!! Looks like you stumbled onto the most serious and dangerous Perl
bug ever!!!

Then again....have you considered the very real possibility that you could
actually be missing something?

perldoc -q buffer

 

[Jürgen Exner]

print "Sleep\n"; #string with newline
sleep 1;

print "Sleep"; #string without newline
sleep 1;

# in the first example, everything is fine and dandy.
#
# in the second example perl appears to be sleeping before executing
the second print command to print "sleep" without the newline.

#is this a bug in perl or something I'm just missing?

Your Question is Asked Frequently, please see "perldoc -q buffer".

jue