Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change
 
PerlMonks  

Re: Chaining string ops

by seattlejohn (Deacon)
on Aug 28, 2003 at 17:20 UTC ( #287458=note: print w/replies, xml ) Need Help??


in reply to Chaining string ops

Something like this?

package StringObject; use strict; use warnings; use overload q{""} => \&to_string; sub new { my ($class, $string) = @_; return bless \$string, $class; } sub s { my ($self, $match, $substitute) = @_; $$self =~ s/$match/$substitute/; return $self; } sub to_string { my ($self) = @_; return $$self; } 1;

Quick inspection tests:

use strict; use warnings; use StringObject; my $s1 = StringObject->new("the boy walked the dog"); print $s1, "\n"; $s1->s('walked', 'fed')->s('boy', 'girl')->s('dog', 'Audrey II'); print $s1, "\n"; exit;

You'd probably want to overload the other stringy functions (comparisons, concat) as well to make the semantics consistent.

As written, this won't handle backreferences in the replacement string. There are probably other limitations. I personally don't see a lot of benefits to this substitution chaining idiom in the first place, but I thought it might be fun to show an example of blessing something other than a hashref.

        $perlmonks{seattlejohn} = 'John Clyman';

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://287458]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others perusing the Monastery: (3)
As of 2023-02-04 20:59 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    I prefer not to run the latest version of Perl because:







    Results (31 votes). Check out past polls.

    Notices?