Re: Refactoring to a Closure

Hello,

I'd expect it to go the other way around: Convert Closure to Function.
I've always seen lambda expressions as the most 'concrete' form of
code partitioning. As I see it, you create one because you need a
function pointer to pass to someone else, and the code you want to
pass isn't already isolated in a function.

Once it's useful to name the expression (e.g. for reuse or clarity),
you can extract the code block into a named function.

Of course, I rarely use closures myself, working in C++, so I could be
missing something.

- Kim

On Fri, Dec 18, 2009 at 22:48, jcsextro <[email protected]> wrote:
> Below is a blog post I have written about Java and a straw-man proposal to add closures to Java 7.  I am interested in your thoughts about this.
>
> http://www.agileevidence.com/
> Does Java Need an 'Extract Closure' Refactoring?
>
> A straw-man writeup has been proposed by Mark Reinhold for including Lambda expressions (or Closures) in Java 7.
>
> Over the course of my career as a developer I have never used a language where closures were a tool in the developers' toolbox. Because of this my brain does not create solutions using closures. Since my conversion to Test Driven Development I work hard to ensure that I am implementing the simplest solution possible for the feature that I am developing. For this reason I have titled this post "Does Java Need an 'Extract Closure' Refactoring?" rather than something more obvious, such as "Does Java Need Closures?"
>
> I won't write any code using closures because a closure isn't the simplest thing that can work. I know this because of the millions of bits of code that I have already written in Java without closures.
>
> The only way I can envision myself using a closure would be as the result of a refactoring. For me to extract code into a closure it will have to make the code easier to read and/or improve the reusability of the code.


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