On Jan 27, Trina Espinoza said:
>So this may be wishful thinking, but I would be kicking myself later if I
>didn't ask. Is there a function in perl where you give the function exact
>line numbers and it would only read the data in the range of lines you
>gave it? My other alternative would be using a counter to find a start
>line and an end line in a file. Doable but painful. Let me know if there
>is any hope . . .
When you read a line from a filehandle, Perl stores the line number in $.,
so you can use that to your advantage:
while (<FILE>) {
if ($. >= $start and $. <= $end) {
print; # or do whatever
}
}
What's even better, though, is that there's another way to do that:
while (<FILE>) {
if ($. == $start .. $. == $end) {
print;
}
}
and if those values ($start and $end) are constants that are hard-coded
into your program, you can just write it as:
while (<FILE>) {
if (10 .. 20) {
print; # displays lines 10 through 20
}
}
For more on the subject, please read 'perldoc perlop' and look for
'Range Operators'.
--
Jeff "japhy" Pinyan [EMAIL PROTECTED] http://www.pobox.com/~japhy/
RPI Acacia brother #734 http://www.perlmonks.org/ http://www.cpan.org/
<stu> what does y/// stand for? <tenderpuss> why, yansliterate of course.
[ I'm looking for programming work. If you like my work, let me know. ]
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