It’s time to clean out some old branches from the team’s git repository. In memory of them, I record useful tricks here. First, Sharon’s post talks about finding branches that are ripe for deletion, by detecting branches already merged. This post covers those, plus how to find out more about the others. This post is …
How much data can our Hadoop instance hold, and how can I make it hold more? Architectural Background Hadoop is a lot of things, and one of those is a distributed, abstracted file system. It’s called HDFS (for “hadoop distributed file system,” maybe), and it has its uses. HDFS isn’t a file system in the …
Or, What underlying implementation is clojure.tools.logging using? Today I want to change the logging configuration of a Clojure program. Where is that configuration located? Changing the obvious resources/log4j.properties doesn’t seem to change the program’s behavior. The program uses clojure.tools.logging, but that’s a wrapper around four different underlying implementations. Each of those implementations has its own ideas …
In bash (the default shell on Mac), today we wanted to execute a command over each line of some output, separately. We wanted to grep (aka search) for some text in a file, then count the characters in each matching line. For future reference… Perform a command repeatedly, once per line of input: grep “the” …
Read moreRepeating commands in bash: per line, per word, and xargs
This should be easier, but here it is for reference: curl -w “status: %{http_code}\n”
Testing is easier when you can see what messages are received by your actors. To do this, add logging to your real code, and then change your configuration. This post shows how to hard-code some debugging configuration for testing purposes. Step 1: put logging into your receive method, by wrapping your existing receive definition in …
test { exclude ‘**/Manual*’} this is here because I know I will forget it.
How do you test whether a JavaScript object is empty?The short answer (if you’re using JQuery) is: $.isEmptyObject(obj) The longer answer is, you loop through its properties. This is the method JQuery is using. for(var prop in obj) { // it is not empty if this hits} The even longer answer is, you loop through …
Reference post. Don’t expect this to be interesting. We had a particular subdirectory of a repository (repoA) that really belonged in repoB. The goal is to transfer all files and history from repoA to repoB, permanently. Thanks to Nikolai in this blog post, the move isn’t too bad. I’m not going to repeat his instructions. …
Read moreStupid git tricks: transferring part of one git repo to another
And there was pain… I imported an existing Android project into IntelliJ Idea Community Edition 10.5.1. Some things started complaining “Please select Android SDK.” The help pages are out of date; they say to do this in the Android facet settings. It isn’t there. Here is the secret do-things-right button: Module settings (ctrl-alt-shift-S), then pick …