FYI, when you type CTRL-D, the tty driver echos back 4 characters ^D\b
\b (where \b is <CTRL-H> or backspace). So when perl outputs its
first line, it writes 3\n (which the tty driver converts to 3\r\n),
so the ^ is overwritten by the 3, leaving 3D.
Edward Moy
Apple
On Feb 1, 2006, at 10:01 AM, Jonathan Levi MD wrote:
At 4:13 PM +1030 2/1/06, Paul McCann wrote:
Jonathan Levi wrote:
#!/usr/bin/env perl
# [comments omitted]
print reverse <>;
drj2:learningperl4 jonathan$ p052e1.pl
...
3
3D
..
I'm pretty sure that you're just seeing an artefact of executing
in the terminal (ie it's a display problem, rather than a problem
with the output).
If you try to "catch" the output instead, via
p052e1.pl > output.txt
and then "less output.txt" you should notice that the "^D"
terminated input gives the same result as when you point at a file
for the input.
You were right, the stray "D" didn't appear in output.txt, so I
don't have to worry about it creeping into output files. Many
thanks, Jonathan
