Re: [OT] Interesting blog post on disadvantages of the pure functional paradigm

2016-12-09 Thread Timon Gehr via Digitalmars-d

On 10.12.2016 00:25, qznc wrote:

On Friday, 9 December 2016 at 10:25:49 UTC, Kagamin wrote:

On Friday, 9 December 2016 at 10:01:13 UTC, qznc wrote:

http://beza1e1.tuxen.de/articles/functional.html


What about python and javascript?


Python and Javascript are mixed paradigm languages. You could argue if
purity and immutability are part of FP, then Python and Javascript lack
essential parts of FP and are not mixed. That is a good point. It is
also what hardcore FP programmers think about those languages. They pity
them.
...


I don't think it is necessarily the best approach to start with an 
imperative language and then say that purity and immutability are 
somehow features you add on top in order to obtain FP. [1]


It is just as valid to consider impure languages as restrictions of pure 
functional programming languages where all computations take place in a 
specific non-customizable monad.


If the starting point is logic, functional is more fundamental, if the 
starting point is current hardware, imperative is more fundamental. I 
think it is useful to understand both of those perspectives well.




If FP is about being declarative, then logic programming (Prolog) is
even more so.


Questionable.

Quick google search finds this post, there might be better explanations: 
https://synthese.wordpress.com/2010/08/21/prologs-death/





[1] Also, immutability, in the D sense, is not essential. What is 
important is value semantics. Immutability actually prevents lazy 
functional programming.


Re: [OT] Interesting blog post on disadvantages of the pure functional paradigm

2016-12-09 Thread qznc via Digitalmars-d

On Friday, 9 December 2016 at 10:25:49 UTC, Kagamin wrote:

On Friday, 9 December 2016 at 10:01:13 UTC, qznc wrote:

http://beza1e1.tuxen.de/articles/functional.html


What about python and javascript?


Python and Javascript are mixed paradigm languages. You could 
argue if purity and immutability are part of FP, then Python and 
Javascript lack essential parts of FP and are not mixed. That is 
a good point. It is also what hardcore FP programmers think about 
those languages. They pity them.


If FP is about being declarative, then logic programming (Prolog) 
is even more so.


Re: [OT] Interesting blog post on disadvantages of the pure functional paradigm

2016-12-09 Thread Kagamin via Digitalmars-d

On Friday, 9 December 2016 at 10:01:13 UTC, qznc wrote:

http://beza1e1.tuxen.de/articles/functional.html


What about python and javascript?


Re: [OT] Interesting blog post on disadvantages of the pure functional paradigm

2016-12-09 Thread Kagamin via Digitalmars-d

On Friday, 9 December 2016 at 10:01:13 UTC, qznc wrote:
What is your definition of Functional Programming? Mine: 
http://beza1e1.tuxen.de/articles/functional.html


I think, it's more about being declarative.


Re: [OT] Interesting blog post on disadvantages of the pure functional paradigm

2016-12-09 Thread qznc via Digitalmars-d

On Friday, 9 December 2016 at 09:58:27 UTC, Kagamin wrote:

Functional doesn't imply purity and immutability


I disagree.

What is your definition of Functional Programming? Mine: 
http://beza1e1.tuxen.de/articles/functional.html




Re: [OT] Interesting blog post on disadvantages of the pure functional paradigm

2016-12-09 Thread Kagamin via Digitalmars-d
Functional doesn't imply purity and immutability, and mutable 
functional has cognitive problems: mutation is important, but 
functional code is too high level, so whatever happens is hidden 
from the programmer; D suffers from this too as people are 
confused whether ranges are taken by value or by reference - this 
is important because they are mutable.


Re: [OT] Interesting blog post on disadvantages of the pure functional paradigm

2016-12-08 Thread Stefan Koch via Digitalmars-d
On Thursday, 8 December 2016 at 13:40:21 UTC, Andrei Alexandrescu 
wrote:

http://flyingfrogblog.blogspot.com/2016/05/disadvantages-of-purely-functional.html
 -- Andrei


Great Find! Thanks for sharing it.

This article expresses in nice words what is wrong with 
mono-paradigm languages.

Performance always has to yield to the Paradigm.


[OT] Interesting blog post on disadvantages of the pure functional paradigm

2016-12-08 Thread Andrei Alexandrescu via Digitalmars-d
http://flyingfrogblog.blogspot.com/2016/05/disadvantages-of-purely-functional.html 
-- Andrei