I am not only in the 'love it' camp, i am also responsible
for helping spread this:
# stackable method calls:
print DBIx::XHTML_Table
->new($data_source,$usr,$pass)
->exec_query('select foo,baz from bar')
->output()
;
The first time i saw this (and it was in
SOAP::Lite as well, BTW) i was a bit perplexed, but
once i understood the convience it gave to the client, i
loved it. Could it make debugging harder for the client?
Sure! Answer? Don't use it!
my $table = DBIx::XHTML_Table->new($data_source,$usr,$pass);
$table->exec_query('select foo,baz from bar');
print $table->output();
I went back over my CVS tree to see when i added the change,
and what comments i added:
Version 0.98 (12/31/2001)
- all methods that normally returned void now
return $self (this allows stacking methods)
However, i must admit that the large number of folks who
don't like this does impact me a bit. I will keep an eye
out for bugs that 'stackable methods' might introduce, but
i have honestly had no troubles with them, be it debugging
or what not. The key is to use the 'plain old boring' style
while testing.
Finally, this 'stackable method' style is most likely only
for certain OO candidates. DBIx::XHTML_Table (while feature
loaded) is a very simple module. All methods serve to get
the final output, and i think that is what makes chaining
them okay for that module. Other modules might be better off
sticking to individual calls.
Damn good question again, perrin :)
jeffa
L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)
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