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While working on my last projects I accumulated a collection of pure functions I needed now and then. So I thought, why not write a short pitch as a README and

by Dobiasd 11y ago

While working on my last projects I accumulated a collection of pure functions I needed now and then. So I thought, why not write a short pitch as a README and make it public? So here it is. It would be very nice of you if you could tell me what you think, so I can learn and improve.

Ace17 11y ago
Although an implementation based on streaming combinators (=no intermediate allocations) clearly is faster, the interface you provided definitely corresponds to the way I want to program. You might want to have a look to std.algorithm from Phobos (the D programming language standard library) ; it's full of such utilities : http://dlang.org/phobos/std_algorithm.html http://dlang.org/phobos/std_algorithm.html That's a shame there's nothing similar in the C++ standard library.
frozenport 11y ago
I generally use python when manipulating lists, and C++ for floating point oriented tasks.
- Dobiasd 11y ago
  What do you do if your application needs to do both?
  - frozenport 11y ago
    Thats a great question! In one case I used a python wrapper around a C++ core, but when it came time to re-write it we switched to pure python and have so far hit our performance benchmarks - mostly because libraries like OpenCV or PyCuda are now able to efficiently wrap our critical paths.
- Ace17 11y ago
  The OP's work shows it clearly is possible to manipulate lists in C++, in a simple and concise way.
vitd 11y ago
I'll just say that it looks very interesting, and it's the type of thing that might help me to better learn functional programming. I jumped in with Haskell a year or two ago, and while it was interesting, learning it has been a pain because it's so different from imperative programming. Something like this where I can dip a toe in a little at a time in a language I already understand looks appealing. I'm not concerned about efficiency of code in this case, just efficiency of learning the concepts.
- Dobiasd 11y ago
  Great to hear that. Good luck on your journey to functional programming. I also started with Haskell and had problems with it. Then I found Elm, and that was like of a gateway drug for me. Here is my story in case you are interested: https://github.com/Dobiasd/articles/blob/master/switching_from_imperative_to_functional_programming_with_games_in_Elm.md https://github.com/Dobiasd/articles/blob/master/switching_fr...

by Dobiasd 11y ago

Ace17 11y ago

Although an implementation based on streaming combinators (=no intermediate allocations) clearly is faster, the interface you provided definitely corresponds to the way I want to program. You might want to have a look to std.algorithm from Phobos (the D programming language standard library) ; it's full of such utilities : http://dlang.org/phobos/std_algorithm.html http://dlang.org/phobos/std_algorithm.html That's a shame there's nothing similar in the C++ standard library.

frozenport 11y ago

I generally use python when manipulating lists, and C++ for floating point oriented tasks.

Dobiasd 11y ago
What do you do if your application needs to do both?
- frozenport 11y ago
  Thats a great question! In one case I used a python wrapper around a C++ core, but when it came time to re-write it we switched to pure python and have so far hit our performance benchmarks - mostly because libraries like OpenCV or PyCuda are now able to efficiently wrap our critical paths.
Ace17 11y ago
The OP's work shows it clearly is possible to manipulate lists in C++, in a simple and concise way.

vitd 11y ago

I'll just say that it looks very interesting, and it's the type of thing that might help me to better learn functional programming. I jumped in with Haskell a year or two ago, and while it was interesting, learning it has been a pain because it's so different from imperative programming. Something like this where I can dip a toe in a little at a time in a language I already understand looks appealing. I'm not concerned about efficiency of code in this case, just efficiency of learning the concepts.

Dobiasd 11y ago
Great to hear that. Good luck on your journey to functional programming. I also started with Haskell and had problems with it. Then I found Elm, and that was like of a gateway drug for me. Here is my story in case you are interested: https://github.com/Dobiasd/articles/blob/master/switching_from_imperative_to_functional_programming_with_games_in_Elm.md https://github.com/Dobiasd/articles/blob/master/switching_fr...