Trina Espinoza wrote:
>
> 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?
You can use integer literals with the range operator in scalar context:
while ( <FILE> ) {
if ( 44 .. 98 ) {
# do something only to lines 44 through 98 inclusive
}
}
> 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 . . .
You can use the built-in $. variable which contains the current line number:
my ( $start, $end ) = @ARGV; # get line numbers from the command line
while ( <FILE> ) {
if ( $. == $start .. $. == $end ) {
# do something only to line numbers in $start through $end inclusive
}
if ( $. == 73 ) {
# do something only to line 73
}
}
Note that $. only works when reading a filehandle in a while loop.
John
--
use Perl;
program
fulfillment
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