jessitron If some team members use git-svn locally, they might have a local working branch. When the team moves to a central git repository, that work needs to come with them. In the old git-svn repo: 1) Find the revision where the local branch of interest branched off master: git svn find-rev `git merge-base $branch master` … Read moreConverting from svn to git: salvaging local branches
“Idempotent” is a big word. It’s one of the four-dollar words thrown around by functional programmers, and it confuses people — including functional programmers. This is because we don’t use it consistently. In math, idempotence describes only unary functions that you can call on their own output. Math-idempotence is, “If you take the absolute value … Read moreIdempotence in math and computing
TL;DR – use def all the time, and things just work. Remember that old adage from Java, “Never call a nonfinal method in your constructor”?Yeah, that still applies in Scala, and it keeps biting me. It’s easier to get wrong in Scala. Here’s a refresher:When a class is instantiated, the superclass is initialized first. Its … Read moreDef and Val in Scala constructors
Your home and your bank account: one of these is an asset, and one is money. Enter the real estate market, and they become interchangeable, with substantial effort. Matter and energy: they’re the same at some level. If it were easy to go back and forth, we’d all move around at the speed of light. … Read moreProgram relativity: F = d*c^2
Preface: I studied physics in college, yet there were parts of it that didn’t click with me. Special relativity with all its “a flashlight on a train” examples, that’s counterintuitive and hard. Yesterday in Surfaces & Essences, the authors explain Einstein’s thought process when he came up with it, and it makes sense this way. … Read moreSpecial Relativity finally makes sense
3 + 2 = 5 can there be two ways of looking at that? Turns out there are.[1] One can see = as equivalence, which means that 5 = 3 + 2 is the same statement. Or, one can read = as “results in”, seeing “the operation of adding 2 to 3 yields 5.” In … Read moreEquations
When we feel like we’re good at something, that’s when we can really learn it, sink our teeth in and love it and do it until we’re experts. It is a great motivator, this feeling of confidence. This belief that we can accomplish what we want to do is called self-efficacy. There are four sources … Read moreWhy Aren’t There More Women Programmers
The other day someone told the story of a mom and teenage kid on a long car trip. At some point the mom says, “I can’t talk anymore, I have to focus on driving.” The kid was like, “It’s no fair, you get to play the whole time.” The kid perceived driving as a game, … Read moreFrom Mario Kart to Version Control
Sometimes it behooves one to erase commits of large binaries from history. Binaries don’t play nicely in git. They slow it down. This post will help you find them and remove them like they were never there. In svn, people only download the latest version of the repository, so if you commit a large binary, … Read moreFinding and removing large files in git history
Moving from svn to git, git-svn is your best friend. However, it is a recent best friend and doesn’t understand you some days. I’m working on moving a repository from sourceforge (in svn) to bitbucket (in git). Theoretically, I should be able to clone the repo into git locally, then push all the history up … Read moreConverting from svn to git