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Fixing Git Commit Signing

Today I went to commit something to a repo and this happened: $ git commit error: gpg failed to sign the data fatal: failed to write commit object I know that I successfully committed somethin...

Combinations Part 5 - (wrapping it up)

The original problem as posed by Eric Lippert was to write a function to produce all the combinations of k elements from a collection of n elements. So far I’ve ported the code to product all the c...

Combinations - Part 4 (combinations of booleans)

In this article we’ll implement the combinations function from Eric Lippert’s post. Here he implements a function that returns all the combinations of n booleans with k of them set to true. See ...

Combinations - Part 3 (SequenceOf extensions)

I want to continue on with my implementation of Combinations. But first, when working on this problem I determined I really needed some helper methods on SequenceOf. Initially these were very comp...

Combinations - Part 2

Last time I started working on the combinations problem that Eric Lippert wrote about: Collections We’ll be working a lot with SequenceType, SequenceOf, GeneratorType and GeneratorOf. I’m more fam...

Combinations - Part 1

I’ve had a difficult time trying to understand the collections in the Swift programming language from Apple. In particular, I’ve been trying to identify the analog of the IEnumerable type from C#. ...

Math from scratch in Haskell: addition

Last time I developed a representation of Natural numbers following Eric Lippert’s lead. In this post I’ll continue to follow him and implement addition. Eric did all the hard work of explai...

Math from scratch in Haskell: zero and one

I’ve been following a set of posts written by where he is implementing arbitrary size naturals and the corresponding arithmetic in C#. As I follow along I’m writing an implementation in Haskell ...

Importing Subversion Into Git

Over the years I’ve accumulated some Subversion repositories. I used Subversion to control the source code I wrote for my masters courses. These repositories are sprinkled around a couple of comp...

Using git instaweb on a Mac

Today I discovered git instaweb. This is a very cool feature that allows you to instantly view your local repository (the one in your current working directory) in a web browser. It was incredib...