Memoizing recursive functions via the fixed-point Y combinator ...
If you like the article below, you might also enjoy: Recursion as fixed points Students of algebra are already familiar with recursion and fixed points. They just don't realize it.
How to read Haskell like Python
tl;dr — Save this page for future reference. Have you ever been in the situation where you need to quickly understand what a piece of code in some unfamiliar language does? If the language looks a lot like what you’re comfortable with, you can usually guess what large amounts of the code does; even if you may not be completely familiar how all the language features work.
Use functional programming techniques to write elegant JavaScript
Introduction Functional programming languages have been in academia for quite some time, but historically they do not have extensive tools and libraries available. With the advent of Haskell in the .NET platform, functional programming is becoming more popular. Some traditional programming languages, such as C++ and JavaScript, import constructs and features from functional programming.
Functional Data Structures Out Of Nowhere
I’ve been watching the Structure and Interpretation of Computer Programs videos recently while riding the Caltrain and enjoyed it quite a bit. For some reason I can’t quite grasp, I find these fun. Maybe it’s the fact that these are 20 years old now and still terribly relevant (especially for functional programming), maybe it’s the look of the attendance, very eighties, or maybe the obvious delectation Hal Abelson and Gerald Jay Sussman have teaching. Anyways, pretty intesting stuff. One of the thing they emphasize a lot during their lessons is the blurring line between data structures and functions when programming in a functional style extensively.
VsHaskell
See also [LanguageComparisons]. Haskell Haskell is a modern functional language (like lisp).
Functional Javascript
var Functional; Functional is the namespace for higher-order functions. Functional.install = function(except) This function copies all the public functions in Functional except itself into the global namespace. If the optional argument is present, functions named by its property names are not copied. Higher-order functions
Backus's Idea of Functional Programming
In my earlier post about John Backus, I promised to write something about his later work on functional programming languages. While I was in a doctors office getting treated for an awful cough, I re-read his 1977 Turing Award Lecture. Even 30 years later, it remains a fascinating read, and far from being dated, it’s positively astonishingly to see both how far-sighted Backus was, and how little progress we’ve actually made. Backus started from a pretty solid perspective. Almost all of the common programming languages that we see – ranging from Backus’s own 1950s version of Fortran, to the most modern languages we see widely used today (Java/C/C++), to the various languages that have been proposed as alternatives to those (Modula-3, Oberon, Ada), even to most of the supposedly functional programming languages (Lisp, ML) – all of them are ultimately based quite strongly on the von Neumann model of computing. That division stinks for a lot of reasons.
Why the world needs Haskell - Devalot
This is a technical review of Haskell and why software developers should care about functional programming. For a non-technical review of why your company should be using Haskell you might want to watch this introduction to Haskell video by FP Complete. TL;DR: Writing high-quality, bug-free software isn’t easy. Haskell (and similar languages) provide the programmer with the tools necessary to get closer than ever before. By removing entire categories of bugs (such as those caused by null pointers and nil objects, type coercions, accidental mutation, etc.) and introducing a powerful type system, programmers can write better code in the same amount of time (and often less) than more traditional languages. Null Pointers and Undefined Values
PHPUnit Support
After you set up PHPUnit, Web IDE greatly helps you to run your tests. Namely, to quickly create test run configuration: Right-click the desired target: a directory or a PHP file in the Project view, or a test class/method name in the code editorChoose Run<name> to start or Create<name> to specify additional parameters
Why functional programming?
The canonical answer to that question is probably “Why functional programming matters“, but here’s a specific example that makes the case nicely. Neil Mitchell is working on Supero, an optimizing compiler for Haskell which includes some ideas from supercompilation. But that’s not important right now. What is important is the technique Mitchell uses in the blog post at the second link above.
Hoogle
Hoogle is a Haskell API search engine, which allows you to search many standard Haskell libraries by either function name, or by approximate type signature. Example searches: map (a -> b) -> [a] -> [b] Ord a => [a] -> [a] Data.Map.insert Enter your own search at the top of the page. The Hoogle manual contains more details, including further details on search queries, how to install Hoogle as a command line application and how to integrate Hoogle with Firefox/Emacs/Vim etc. I am very interested in any feedback you may have. Please email me, or add an entry to my bug tracker.
Haskell and Scheme: Which One and Why?
While I was waiting for stuff to install on my new machine, I was doing some browsing around the web, and came across an interesting article at a blog called “The Only Winning Move”, titled [Scheme Death Knell?]( It’s not a bad article at all, but I disagree with its conclusions, and I thought it would be interesting to discuss why. The article was brought on by *another* blog post, this one at [Lambda the Ultimate]( suggesting that someone translate Douglas Hofstadter’s columns introducing Scheme to replace the Scheme with Haskell. Josh over at TOWM was slightly irritated by this idea, and concludes that the only reason why people are suggesting that is because scheme is getting too old to be cool and trendy, and so they want to switch to something newer. I disagree.
