Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling
 
PerlMonks  

Re^3: $. - smarter than you might think

by shmem (Chancellor)
on Jun 22, 2006 at 23:13 UTC ( [id://557037]=note: print w/replies, xml ) Need Help??


in reply to Re^2: $. - smarter than you might think
in thread $. - smarter than you might think

heh.. that makes me think about a $SIG{__DIE__} handler which not only says harshly "Can't do method foo in context bar in file quux line 1024" or such, but prints the 3 lines above and below the error as well...
don't talk nonsense at blah.pl line 23. 21 learn('nothing'); 22 sub blah (\[&]) { 23 warn "don't talk nonsense"; > 24 $_[0]->(); 25 } 26 sub learn { 27 my $self->teach(shift); Can't use string ("bar") as a subroutine ref while "strict refs" in us +e at blah.pl line 24.

I discovered this playing with your code, btw. Thanks!

cheers,
--shmem

#!/usr/bin/perl use strict; $SIG{__DIE__} = sub { if(my ($d) = $_[0] =~ /line (\d+)/) { seek DATA,0,0; while(<DATA>) { if($. == $d) { warn '> '.$..' '.$_; } else { warn ' '.$..' '.$_ if ($. > $d - 4) && ($. < $d + 4); } } } }; my $foo = 'bar'; blah($foo); learn('nothing'); sub blah (\[&]) { warn "don't talk nonsense"; $_[0]->(); } sub learn { my $self->teach(shift); warn "got it"; } __END__
hmm.. why does it succeed to compile and run whilst calling blah() with a scalar and not a subref?

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

Replies are listed 'Best First'.
Re^4: $. - smarter than you might think
by radiantmatrix (Parson) on Jun 26, 2006 at 15:56 UTC
      Hey, good on ye... it's always nice to see bad hacks smoothened into a reasonable thing.

      radiantmatrix ++ if $self->($points_left).

      But! you have an extra ) on line two of your code ;) And if would get picky, I'd rather write warn +($. == $d ? '>' : ' ') than print STDERR. Flavours :)

      thx & greets,
      --shmem

      _($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                                    /\_¯/(q    /
      ----------------------------  \__(m.====·.(_("always off the crowd"))."·
      ");sub _{s,/,($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e,e && print}
      

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://557037]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others studying the Monastery: (8)
As of 2024-03-28 12:28 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found