2011/1/8 Cédric Beust ♔ <[email protected]>
>
>
> On Sat, Jan 8, 2011 at 5:43 AM, Kevin Wright <[email protected]>wrote:
>
>> and a functional style just leads to more inherently testable code
>
>
> Do you seriously believe that?
>
> Actually, ignore my question because you're going to spin into an endless
> Scala rant yet again.
>
> Anyone who thinks that good quality code is a function of a programming
> language or a programming style and not of a good developer hasn't written
> enough code.
>
>
Yes, I do sincerely believe that. Declarative programming tends towards a
style in which code performs a sequence of transformations.
So whereas, in an imperative style, you might see a snippet like this:
for(i <- intList) {
println("doubled entry: " + i*2)
}
A functional approach would be more like:
val doubledList = intList map { _ * 2 }
doubledList foreach { println("doubled entry: " + _) }
Used throughout a system, this approach leads to a lot more "seams"* in the
code, where it's easy to wrap unit tests, or to inspect/log intermediate
results.
Ultimately code quality *is*, in part, a function of programming style.
Which is itself a function of being a good developer.
*(* I thank Michael Feathers for first introducing use of the word "seam" in
this context.)*
--
> Cédric
>
>
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--
Kevin Wright
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