perl function reset

In Perl, the reset function is used to clear the reset flag on a filehandle after an eof or eofile call. This function is used to remove the end-of-file condition from a filehandle.

Here's an example of using the reset function:

open my $fh, '<', 'input.txt' or die "Cannot open file: $!";
while (my $line = <$fh>) {
  print $line;
}

# Check if end of file is reached
if (eof $fh) {
  print "End of file reached.\n";
}

# Reset the file handle to remove the end-of-file condition
reset $fh;

# Read the file from the beginning again
while (my $line = <$fh>) {
  print $line;
}
close $fh;

In this example, we open a file input.txt for reading and read its contents using a while loop. After reading all the lines, we check if the end of the file is reached using the eof function. If it is reached, we print a message.

Then, we reset the file handle using the reset function, which clears the end-of-file flag. After resetting the file handle, we can read the file from the beginning again using the same file handle. Finally, we close the file using the close function.