The F# team at Microsoft have kindly released a draft of their F# Component Design Guidelines. This document provides a wealth of advice for professional F# developers covering both F#-facing code and code exposed to other .NET languages.
Recommended reading for all F# programmers!
The F#.NET Journal just published an article about typeful programming:
"The pedagogical calculator sample demonstrates how a program can evaluate mathematical expressions originating from the user interface of a calculator. This article describes the design and implementation of a calculator application that uses Windows Presentation Foundation to provide a graphical user interface similar to that of a traditional calculator. In particular, every effort is made to leverage static checking in order to catch as many bugs at compile time as possible. This includes not only sophisticated union types to represent the state of the state machine but also exhaustiveness and redundancy checking of the advanced pattern matches that result as well as their factoring to reduce code size..."
To read this article and more, subscribe to The F#.NET Journal today!
Creator of the F# programming language and all-around great guy Don Syme will be giving a lecture at the F#unctional Londoners Meetup, Skills Matter eXchange, on 9th September 2010.
The Skills Matter eXchange have kindly uploaded the video of my recent lecture as well as the accompanying slides.
The core of this lecture is an explanation of why purely functional code that looks embarrassingly parallel often does not scale and how scalability can be achieved through the use of mutation.
The example used is QR decomposition where pure code achieves less than 2× speedup on 8 cores but impure F# code achieves over 7× speedup and beats the reference implementation of BLAS and LAPACK with 99% less code. However, the lessons learned are not specific to this algorithm or even to numerical methods in general but apply to all software running on .NET.
For vastly more information on this subject, stay tuned for our forthcoming Multicore .NET book.
The F#.NET Journal just published an article about data structures:
"A min-heap is a tree-based data structure that satisfies the constraint that the children at any given branch are always larger than their parent and, consequently, the minimum element is at the root. Heaps are most notable as an efficient way to implement priority queues which, in turn, underpin a variety of algorithms including some seen in previous F#.NET Journal articles. This article examines skew heaps, leftist heaps, pairing heaps and splay heaps..."
To read this article and more, subscribe to The F#.NET Journal today!
Zach Bray of Trayport and Jon Harrop of Flying Frog Consultancy Ltd. will be presenting lectures at Skills Matter eXchange London (UK) at 6:30pm on Wednesday 28th July 2010.
Many thanks to Carolyn Miller and Phil Trelford for organizing F#unctional Londoners Meetup Group, an excellent series of events!
The F#.NET Journal just published an article about image processing and the new charting functionality in .NET 4:
"Over- and under-exposed images have their intensity distributions skewed to the high or low end of the range. Histogram equilization is one technique to combat this effect digitally by spreading out the distribution of intensities in an image via the intensity histogram. This article describes a program for image enhancement using histogram equalization with an interactive WPF-based GUI using the new charting functionality in .NET 4 to visualize the intensity histograms in real time..."
To read this article and more, subscribe to The F#.NET Journal today!
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