+1 to pipe-lines of immutable data transformations. That was the biggest 
paradigm shift for me coming to FP and made the world a much better place.

> On 2 Oct 2015, at 16:41, Gary Trakhman <gary.trakh...@gmail.com> wrote:
> 
> There are a lot of strategies to deal with the coupling of reuse.  I find 
> that using pure functions makes it easy to split off responsibilities after 
> the fact and add multiple entry points (the hard thing becomes naming those 
> functions).  Eventually a new 'essence' of the abstraction will show itself 
> and inspire a larger refactor.  That's something I really miss when doing 
> java.  
> 
> Also, I feel that the reusable clojure code is always doing more work than 
> corresponding java code, so my frustration in refactoring is much greater 
> with java and its IDEs.  The refactorings are always superficial compared to 
> what I'm trying to express, and in clojure I can work with data contracts 
> easily.  I often end up writing a new version of the reusable abstraction, 
> writing adapters (just data transformations) from the old to the new, then 
> gutting the old implementation, then hopefully gutting the adapters over 
> time.  Clojure's data focus makes this easy.
> 
> On Fri, Oct 2, 2015 at 11:31 AM Colin Yates <colin.ya...@gmail.com 
> <mailto:colin.ya...@gmail.com>> wrote:
> It might just be me, but I also find the cost of the explicit coupling that 
> is re-use is often far more expensive than any saving offered by re-use of a 
> bunch of text. I also find this _more_ expensive in Clojure than Java as 
> refactoring in Java was pretty robust (IntelliJ is incredibly powerful for 
> this). 
> 
>> On 2 Oct 2015, at 16:25, William la Forge <laforg...@gmail.com 
>> <mailto:laforg...@gmail.com>> wrote:
>> 
>> Refactoring for reuse is a kind of early optimization? Agreed! Generally for 
>> me it waits until the second or third rewrite, as by then I have a bit of an 
>> idea about where I am headed with the code.
>> 
>> OTOH, I finally realized that when I don't know where I am going with 
>> something, keeping the logic in functions instead of methods is probably 
>> safest. I'm thinking now that methods should mostly just be used for their 
>> polymorphism as just a very thin layer over a set of interfaces.
>> 
>> I was so impressed with the advantages of Java over C++ when I started using 
>> it 20 years ago. But now that I've been exposed to Clojure, I'm inclined to 
>> minimize my use of OO and use objects mostly as what I used before OO: 
>> dispatch tables!
>> 
>> 
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