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David Tchepak
Lives in Sydney
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David Tchepak

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I really enjoy trying to understand how and why things like work, but for this post I’m going to try to skip all that wonderful stuff and …
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F# gave me the following error when working with some C# code: error FS0729: This field is not a literal and cannot be used in a pattern I’m …
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I recently had loads of fun attending a Nodebots AU event in Sydney. (Thanks a lot to Damon and Andrew for organising, and NICTA for the venue!) I …
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There are a few different libraries that provide test assertions for F#. I went through a couple today and tried a trivial example in each. I’m …
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http://www.davesquared.net/2014/05/platformless-haskell.html

Installing the latest GHC and Cabal on Mac, rather than installing the full Haskell Platform. Corrections welcome!
Apparently it can be a bit tricky to get some Haskell libraries working on Windows, in which case the Haskell Platform is a great way to get going …
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Not sure if this is a bug or I'm doing something wrong. The code samples in my feed are not showing up when viewed in feedly (http://feedly.com/index.html#subscription%2Ffeed%2Fhttp%3A%2F%2Ffeeds.feedburner.com%2Fdavesquared, "a hasty introduction to the Either type"). The samples appear in the raw feed from feedburner (http://feeds2.feedburner.com/davesquared), albeit wrapped in <notextile> and <figure> elements.

Observed in Chrome, Press Reader for Android, and Reeder app for iPhone.
Feedly connects you to the information and knowledge you care about. We help you get more out of you work, education, hobbies and interests. The feedly platform lets you discover sources of quality content, follow and read everything those sources publish with ease and organize everything in one place.
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David Tchepak

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I’ve been tring to learn D3.js via Mike Bostock’s excellent "Let’s make a bar chart" tutorial series. This post is my …
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Exercise 1.41 of SICP asks us to work out what the following expression will evaluate to, given the definition of double: (define (double f) (lambda …
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Every so often I want to quickly sketch out what should be a simple diagram. Irrespective of what drawing program I use, I always seem to take much …
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tl;dr: Make invalid regular expression strings and attempts to access non-existent capture groups a compile-time error, thanks to the Regex type …
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The Either type, also called Choice in F# parlance, is a way of representing a value that can be either one of two types. This can be extremely …
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Have him in circles
279 people
Richard Banks's profile photo
Peter Moustrides's profile photo
David Thambiratnam's profile photo
Jeremiah Peschka's profile photo
Stephen Godbold's profile photo
Ko-Lin Chang's profile photo
Martin Suchanek's profile photo
Doug Paice's profile photo
Dave Wheeler's profile photo
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