I just noticed that if a base class returns an instance of it's child from a method, then you can write this dumb code:
print $o->bar->bar->bar->bar->bar->bar->bar->bar->bar->bar->bar->bar->
+bar->bar->baz;
My questions are:
- Is there a technical term for this thing (other than "method chaining" of course!)?
- Is it possible to detect it? (caller does not seem to give any info for this)
Full code:
#!/usr/bin/perl -w
use strict;
package BaseClass;
use strict;
sub new {
my $class = shift;
my $self = {};
bless $self, $class;
$self;
}
sub bar {
return Foo->new;
}
package Foo;
use strict;
use base qw(BaseClass);
sub baz {"Some data"}
package main;
use strict;
my $o = Foo->new;
print $o->bar->bar->bar->bar->bar->bar->bar->bar->bar->bar->bar->bar->
+bar->bar->baz;
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|