Beefy Boxes and Bandwidth Generously Provided by pair Networks
good chemistry is complicated,
and a little bit messy -LW

Re: Making variables visible between calls.

by friedo (Prior)
on Dec 12, 2008 at 18:12 UTC ( #730004=note: print w/ replies, xml ) Need Help??

in reply to Making variables visible between calls.

Your anonymous subroutine can't see $var since it's compiled in a lexical scope separate from where it's executed. But it can have values passed into it as arguments.

sub create_f { my $func = shift; return sub { my $var = "xpto"; $func->( $var ); } } my $function = create_f( sub { print ">> $_[0] <<\n" } ); $function->();

Update: And if you want to specify the value at runtime, it's as easy as passing it into create_f.

sub create_f { my $func = shift; my $var = shift; return sub { $func->( $var ); } } my $function = create_f( sub { print ">> $_[0] <<\n" }, 'xpto' ); $function->();

Comment on Re: Making variables visible between calls.
Select or Download Code

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://730004]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others lurking in the Monastery: (12)
As of 2016-02-09 16:08 GMT
Find Nodes?
    Voting Booth?

    How many photographs, souvenirs, artworks, trophies or other decorative objects are displayed in your home?

    Results (319 votes), past polls