21 Matching Annotations
  1. Apr 2020
  2. Feb 2020
    1. Nix is a purely functional package manager. This means that it treats packages like values in purely functional programming languages such as Haskell — they are built by functions that don’t have side-effects, and they never change after they have been built.
  3. Jan 2020
  4. Nov 2019
    1. We might have some dirty mutable objects for performance - but our high-level API should be purely functional. You should be able to follow the React model of modelling your UI as a pure function of application state -> UI.
    1. the abstraction I wished to have was a sort of a pure functional Vim, completely decoupled from terminal UI - where 'vim' is a function of (editor state, input) => (new editor state)
  5. Jan 2019
    1. after the terminal operation of the stream pipeline commences.

      Above is because of the nature of Streams in general: they are lazily executed (or put another way, execution is delayed until the latest convenient method call).

  6. Nov 2018
    1. That is using a specific tool for a specific use case. You don’t actually have a table view of your data. Once it’s in a table, man, you’re good. That is the modeling. A sequel database table, you have this amazing high-level language for doing all sorts of cool operations with it.To turn this into some class hierarchy, it’s almost criminal. There, I said it. It’s like you’re throwing away the power that you have.

      about a situation when you sometime want an is-a relationship but in most cases just have it as loosely structured (table-like) data format

  7. Sep 2018
  8. Aug 2018
  9. Apr 2018
    1. (== 10)

      This confused me. I'm relatively new to Haskell and did not know about sectioning. After learning that detail, this makes sense as a (right) partial application of the (==) function.

  10. Aug 2017
    1. Since Clojure uses the Java calling conventions, it cannot, and does not, make the same tail call optimization guarantees. Instead, it provides the recur special operator, which does constant-space recursive looping by rebinding and jumping to the nearest enclosing loop or function frame. While not as general as tail-call-optimization, it allows most of the same elegant constructs, and offers the advantage of checking that calls to recur can only happen in a tail position.

      Clojure's answer to the JVM's lack to tail call optimization

  11. Apr 2016
  12. Jul 2015
    1. Keeping unpure functions clearly named and organized in such a way that they can be easily identified versus pure functions is a common goal of modularizing and organizing Scala applications.
    2. Much like a Unix power user will compose multiple single-purpose tools into a complex piped command, a functional programmer will combine single-purpose function invocations into chains of operations (think Map/Reduce).