All the FP talks at NDC London
So NDC Oslo has come and gone, and whilst we wait for the videos for NDC Oslo to be available here are all the FP talks from NDC London this year. Enjoy
Javascript
Javascript – string replace all without Regex
I have been working with Node.js and Serverless heavily. It’s the first time I’ve really spent serious amount of time in Javascript, and I’m making plenty of beginner mistakes and learning lots. One peculiar thing I find in Javascript is that String.replace only replaces the first instance of the substring, unless you use a Regex. Fortunately I …
Having fun with HTML5 – Simple painting app using Canvas
It feels like a little while since I last played around with the <canvas> element, so I spent some time over the weekend and put together a simple painting app using the canvas and here is the end result. Here’s some screenshots: Spray Tool One of the interesting things with this simple painting app …
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Reactive Extensions for Javascript – Observable vs ConnectableObservable
For those of you who are familiar with Reactive Extensions you should know all about observables already, but did you know that there’s another kind of observable sequence – Rx.ConnectableObservable. The difference between the two types of observable sequences is well explained here, in short, a connectable observable sequence allows you to share the same …
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Reactive Extensions for Javascript – Causing side effects with Do
I wrote previously about how you can set up multiple observable sequences and subscribe to them with multiple observers and create a many-to-many relationship between them. Whilst this is a very flexible model with a clear separation of responsibilities, often it requires more work to set up and is more than what you need for …
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Reactive Extensions for Javascript – Wikipedia lookup demo
Matthew Podwysocki posted a couple of very good articles on RxJS on codebetter.com and amongst them was a simple demo to do a look up on wikipedia using their open API: Introduction to the Reactive Extensions for JavaScript – Wikipedia Lookup Unfortunately, there wasn’t a live demo you can play around with and see it …
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Reactive Extensions for Javascript – Multiple observers for multiple observables
One of the great things about the Reactive Extensions for Javascript is that you can easily create a many-to-many relationship between observable sequences of values and observers who handles the arrival of new values. You should have a read of these couple of posts first: Introduction to the Reactive Extensions for Javascript – Creating Observables …
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Drag and Drop using Reactive Extensions for Javascript
Been a while since I’ve been meaning to check out Reactive Extensions for Javascript, I have been using the .Net version for a while now and blogged about some of the cool things you can do with the .Net version. Although there are many sources where you can learn about it from they don’t have …
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Test your maths skills at the MathDOJO!
Another productive weekend bares fruit for another mini game! This time I’ve put together a dojo-themed mini game whose sole purpose is to test your ability to do simple (well, mostly) arithmetic calculations in your head and your tolerance for my sense of humour (which is not so bad I hope ;-) ). Screenshots Here’s …
Creating a count down meter with CSS3 and JQuery
Whilst working on the MathDOJO mini game one of the neat little things I tried to do was implement a time meter which steadily counts down and changes colour (from green to yellow to glowing red) as it approaches 0: First, you need something to represent the meter, a simple <span> element will do: 1: …
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