I had the great pleasure to speak at CodeMash this week, and, on my way back, ended up spending a couple of hours at the Atlanta airport waiting for my connecting flight back to the warmer climate of San Francisco – a perfect opportunity for some light-hearted coding fun. A couple of days earlier, I came across this really nice tweet, rendering the results of an L-system: {start:'FFPF',rules:{F:'PF++F[FF-F+PF+FPP][F]FFPF',P:''},'α':60} pic.twitter.com/JZGDV4ghFy— LSystemBot (@LSystemBot) January 10, 2015 [...]

By now, most everyone is aware of Pi Day, celebrating the famous mathematical constant on 3/14. On this day each year, students and math enthusiasts eat pie and engage in light-hearted -related activities. Then there is e Day, a day for commemorating the equally-important-if-somewhat-less-famous constant on 2/7. The activities are similar, though it's less clear-cut what food … Continue reading Today is Phi Day -- at least, it ought to be →

By now, most everyone is aware of Pi Day, celebrating the famous mathematical constant \(\pi \approx 3.14159\) on 3⁄14. On this day each year, students and math enthusiasts eat pie and engage in light-hearted \(\pi\)-related activities. Then there is e Day, a day for commemorating the equally-important-if-somewhat-less-famous constant \(e \approx 2.71828\) on 2⁄7. The activities are similar, though it’s less clear-cut what food one should eat (a high school teacher of mine insisted that the proper e Day [...]

Well, we are in the last hours of 2014, and I am nearly recovered from the craziness that was the F# Europa Tour 2014, so here we go – the Tour, in cold, hard facts (after all, I am a numbers’ guy): 40 days of travelling across Europe. 16 talks. 5 workshops (about 50 hours total). 9 countries. 6991 miles (11,250 kilometers) travelled, roughly (this is straight-line city to city, so the actual number is probably a good deal larger). 14 hours of bus. roughly 50 hours of train. roughl[...]

Een generieke functie kan soms aardig wat tijd besparen. Een nadeel is dat je als programmeur soms ideeën hebt die verder gaan, dan wat de programmeertaal toestaat. Duck Typing is een techniek die de mogelijkheden weer een beetje oprekt.  Wat is Duck Typing en hoe kun je het toepassen in F#?  Laten we vertrekken vanaf bekend terrein in de OO wereld. Stel we hebben twee classes, van type “Rechthoek” en type “Cirkel”, en beide hebben de member-functie “TekenOpScherm() [...]