On Sun, Aug 29, 2010 at 7:58 PM, Chas. Owens <chas.ow...@gmail.com> wrote:
> On Sun, Aug 29, 2010 at 09:41, Kaushal Shriyan <kaushalshri...@gmail.com>
> wrote:
> snip
>> Thanks a lot Chas. Understood now.
>> Also what does $_ default variable means exactly, any example would
>> really help me understand it
> snip
>
> The default variable is set or read by many Perl 5 functions. For
> instance, if you use the readline operator (<>) in a while loop's test
> it sets $_ and print uses $_ if no arguments are passed to it, so
>
> #!/usr/bin/perl
>
> use strict;
> use warnings;
>
> while (<DATA>) {
> print;
> }
>
> __DATA__
> foo
> bar
> baz
>
> will print the lines "foo\n", "bar\n", and "baz\n". $_ is also the
> default target for regexes, so
>
> #!/usr/bin/perl
>
> use strict;
> use warnings;
>
> while (<DATA>) {
> next unless /b/;
> print;
> }
>
> __DATA__
> foo
> bar
> baz
>
> Will print "bar\n" and "baz\n", but not "foo\n" because it does not
> match the regex.
>
> --
> Chas. Owens
> wonkden.net
> The most important skill a programmer can have is the ability to read.
>
Hi Chas,
Thanks Chas.
Much appreciated :-)
I am referring to http://www.perl.org/books/beginning-perl/. so I am
planning to read upto chapter 10. is it recommended to even go beyond
chapter 10.
Please suggest.
How do i start writing my own perl scripts. Please suggest. Do you
recommend something else.
Kaushal
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