i've adopted this style within the last year and have settled on it as
a standard. I had the same problem that Zac states, because I tried
using method chaining to reduce number of lines -- but I had it within
the context of Hibernate and criteria queries, so I started doing
this:
result = session.createCriteria(My.class)
.add(....)
.add(....)
.add(....)
.list();
And that's what I do for CF, too.
It doesn't reduce the number of lines, but it looks less verbose in
context, and that's my goal with chaining. I'd rather see:
<cfset foo.setThis()
.setThat()
.setThisHereThingie()>
than
<cfset foo.setThis()>
<cfset foo.setThat()>
<cfset foo.setThisHereThingie()>
for what it's worth, I think method chaining's goal is clarity and
compactness, not so much reduction in lines.
best,
marc
On Sun, Jan 4, 2009 at 6:20 AM, Alan Livie <[email protected]> wrote:
> Thanks Zac. That's one reason I hadn't thought of.
>
> ________________________________
> From: Zac Spitzer <[email protected]>
> To: [email protected]
> Sent: Sunday, January 4, 2009 10:12:35 AM
> Subject: [CFCDEV] Re: Method chaining
>
>
> i have seen sometimes with CF is that exceptions with this style ( or
> nesting ) throw
> somewhat confusing error messages, i found that CF is easier to debug with
> the
> classic line at a time
>
> z
>
> On Sun, Jan 4, 2009 at 8:50 PM, Alan Livie <[email protected]> wrote:
>>
>> I have just read some code in a Hibernate book that uses a lot of
>> method chaining ie setFoo(1).setBar('myvar').setThis(x).setThat(y) etc
>>
>> I remember some old Open University days doing Smalltalk when method
>> chaining was common as there was no VOID return type on methods so
>> setter methods tended to return THIS.I have also seen this a lot
>> recently doing jQuery work ie $("a").addClass("test").show().html
>> ("foo"); The methods return the jQuery object so chaining is possible.
>>
>> In CF (at least the code I've read and written) we don't tend to do
>> this.
>>
>> Is this for readability reasons or something else I'm not aware of?
>>
>> I think setter methods (and maybe other methods that return VOID)
>> returning THIS is a sensible idea so we can chain or not chain as we
>> see fit.
>>
>>
>> >
>>
>
>
>
> --
> Zac Spitzer -
> http://zacster.blogspot.com
> +61 405 847 168
>
>
> >
>
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