I challenged people to see if they could figure out what I was trying to do based on what I actually did.
I had a line of code that did something I did not want.
print "$ARGV[$.] $_";
What I was trying to do: print each line prefixed by its file name and line number. Points awarded to
dws.
Double Bonus: The line that came before was while(<>) {}. Points awarded to
gizmo_mathboyPlatinum Bonus: The line that came after was chomp; Notice the print line had no newline at the end. A couple of people guessed some really wierd things, but were
thinking zebras instead of horses.
Global Thermonuclear War Bonus: dws came close, but no points. The special variables involved are:
- $. - the line number
- $/ - the input record separator (for <> and chomp)
- $\ - the output record separator (for print)
- $ARGV - the file I am currently reading
- ARGV - the filehandle I am reading
- @ARGV - the array I got the filename from
- $| - the autoflush value
- $_ - holds the current line
- STDOUT - the default output filehandle
Re: Platinum Bonus
jmcnamara on 2003-01-23T09:28:52
The line that came after was chomp; Notice the print line had no newline at the end.
It shouldn't need one. The $_line must already have one if you are looping with while(){} (unless you have -l on the #! line).
I think that I'm still missing something (apart from the black and white stripes). Does your code look like this:
while (<>) {
print "$ARGV\[$.] $_";
chomp;
...
}
If so the
chomp() is unrelated to the
print(). How could we guess that?
Re: Platinum Bonus
brian_d_foy on 2003-01-23T17:00:42
I expected people to guess that since a very common operation after reading a line and before using that line is chomp(). Once someone knew that I did not chomp() before I printed the value, they could guess I did it afterwards.
Oh well. :)
