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...