How often do you use lambda expressions?

clankill3r · July 2015

I was wondering how often you guys use lambda expressions? I really love them, it allows me to write quick short really flexible code.

Instead of a 100% solution class I often go with a 80% solution and do the remaining 20% with lambda expressions.

It really sucks processing IDE can't deal with them. I think lambda's could have made processing a lot better.

GoToLoop · July 2015

We don't even have enum or even a 100% Java 5 compliant IDE! ~X(

clankill3r · July 2015

To give an example, I work on a GUI. Now I can code what a toggle should do instead of relying on reflection.

    boolean useALP;
    
    public void setup() {
    
        toggle(10, 10, 30, 30)
                            .released(btn -> useALP = btn.on);
    
    }

Chrisir · July 2015

can you post us a link to a wikipedia or other ressource pls?

clankill3r · July 2015

https://docs.oracle.com/javase/tutorial/java/javaOO/lambdaexpressions.html

Chrisir · July 2015

Thanks!

clankill3r · July 2015

Np!

clankill3r · November 2016

I just tested, enums ~~and lambda's~~ finally work!

GoToLoop · November 2016

Enum compatibility arrived along P3. But lambda didn't.
I'm still using Processing version 3.1.2. And it doesn't recognize the -> operator! :(
At least JS got lambdas via the => operator: \m/
https://developer.Mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions

clankill3r · November 2016

Would have been nice for GSOC

clankill3r · October 2017

or GSOC 2017...

colouredmirrorball · October 2017

I've used lambdas but to be 100% honest it's mostly because IntelliJ told me so. This was using Processing as an external library.

jeremydouglass · October 2017

Is this a functionality issue or a style issue? Is there anything that you need lambdas for that you cannot do already with anonymous functions, or is it just that the functional style makes the code seem concise / elegant?

clankill3r · October 2017

I don't think it ever can be a functional issue cause what is possible with a lambda is in some way possible without.

As for elegance, take this:

button(20, 20, "saveframe").click(() -> saveFrame());

vs:

button(20, 20, "saveframe").click(new Click(){
            public void click() {
                saveFrame();
            }
        });

The last example requires so much code that I totally change my design to keep away from using interfaces.

neilcsmith_net · October 2017

Also lambdas are not just about cleaner, shorter code - they offer better performance than anonymous classes too!

I'm supporting lambdas a lot now in the non-Processing specific bits of Praxis LIVE. Streams, etc. are also great!

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How often do you use lambda expressions?

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