what does it do undef $/;

[rasmidas]

Hi,
I am new to Perl and could not understand the below line from an existing Perl Code.

undef $/;

Could anyone please let me know, what does it do? Thanks in advance.

Regards...

[mohanprasadgutta]

re: what does it do undef $/;

Hi,

$/ is the input record seperator.
By default its newline. if you set it to undef no record seperator is matched. usually people used to do

undef $/;

to read everything to the end of current file.

Below code will read all the sample.txt into a scalar

open(FILE, "</tmp/sample.txt");
undef $/;
my $content = <FILE>;
close(FILE);

Regards,
Mohan

[rasmidas]

Thanks. Thanks a lot