justaddwater.dk

In a Ruby on Rails app, I wanted a list to be at least of two items. This could be done in several ways. Here is a first naïve impementation: # Naïve implementation, just return whatever number I need def sum_up_a(existing) return 2 if existing == 0 return 1 if existing == 1 return 0 end […]

In a current project I use a lot of Subversion (svn) from the command-line. Subversion recently has lost terrain to Git for several reasons. But actually, svn is capable of doing many of the things I love from Git. Here are some less known commands I find extremely helpful.   Undo last commit svn merge […]

(UPDATED) The GWT developer plugin has been updated to works with Firefox 9, a couple of days ago. Its not yet officially available, but can be downloaded directly from the codebase: google-web-toolkit.googlecode.com/svn/trunk/ prebuilt folder in here  is the gwt-dev-plugin.xpi, and it works like a charm :) Previously i wrote when the plugin was updated to […]

For projects I sometimes have lots of screenshots which I have to repeat whenever I change subtle things in the CSS or HTML. I ended up creating this little handy script based on webkit2png (download source) #!/usr/bin/env sh HOST=”http://localhost:8080/myproject/viewer” /usr/bin/python webkit2png -F -o “01dashboard” $HOST/dashboard /usr/bin/python webkit2png -F -o “02showdetail” $HOST/detail /usr/bin/python webkit2png -F -o […]

Using maven behind a firewall in environments with an internal repository can be troublesome, and even break the build. Here is an option to set up Maven

Just a quick tip for intellij users. For an old project i wanted to convert JUnit 3 testcases to JUnit4 format. Most stuff was already in place, but after the conversion, i found that some of the old “assertTrue”, “assertFalse”, and “assertEquals” statements were failing. So i ended up with some short search/replace, which are really […]

UPDATED 2011-12-14: Prebuilt folder now contains Firefox 8 version of the GWT developer plugin. Since Firefox 7 was released, i have defered upgrading for one simple reason: At work I am dependent on GWT Developer plugin. Today I found the ready-to-release plugin which actually works with Firefox 7: http://google-web-toolkit.googlecode.com/svn/trunk/plugins/xpcom/prebuilt/ in here  is the gwt-dev-plugin.xpi, and […]

Time for a little geeky gimmick. Some developers see and express a lot of “WTF??” while trying to understand code IN this spirit, i created a quick @WTF annotation for Java. Besides being completely useless (its removed at compile time), its only purpose is to give developers a new way to express themselves in code. […]

At a current project I work on, we use a Windows server to run our subversion repository. I wanted to set up the pre-commit hook so that commits with empty comment are automatically rejected. All commit-hook example files that go with Subversion are written in bash (as unix servers tend to be the normal). Here […]

Grabbing data from Restful webservices has never been easier. I use this code in the Rails /db/seeds.rb file to grab data from the Danish webservice with addresses, municipalities, regions, etc. I decided to import the data into a local database to ensure it could work offline. Code from /db/seeds.rb file: Now I can access municipalities […]

Hudson continuous integration server has a console which is good for testing scripts and access to commands that your Hudson jobs need. The hudson console only let’s you run Groovy script. To run commands on the machine, Groovy has the method “string”.execute(). So now I can use this snippet to test versions of Ruby, JRuby, […]

For a project I’m working on, I had to change some files with personal settings, and the files kept showing up with a git status. Adding files to .gitignore that are already tracked does not work. (and it’s actually pretty well documented in the documentation). In stead, it’s possible to use this command: git update-index […]

When it comes to source code, i am a perfectionist. I cant stand to see trailing whitespace, interchanged tabs/spaces, etc. This Stackoverflow user asked How To Remove Trailing Whitespace Of All Files Recursively. This reply helped me to work around the fact that \s and \t are not supported in the mac version of sed: […]

For my own convenience I created this script to identify css files where colors like #aaaaaa can be rewritten in the short form #aaa (saves bandwith, but can also make it easier to identify similar colors) grep -nE ‘#([0-9a-f])\1([0-9a-f])\2([0-9a-f])\3’ **/*.css output from a random project: css/actions.css:19: color: #000000; css/actions.css:38: color: #000000 !important; css/actions.css:53: color: #ffffff […]

I often want to extract parts of HTML page. Often I find myself parsing a doc with Nokogiri and extracting it with a CSS selector. It’s pretty straight-forward from scratch. To follow the Don’t Repeat Yourself principle, I created a script to make it a one-liner. Just run ruby parsepage.rb [url] [css_selector] Feel free to […]

Here is a short one-liner that really annoyed my colleagues today. I set my mac to read aloud all changes in the repository since yesterday: git log –pretty=format:”%an commit %s, %ad.” –date=relative –since=yesterday |say if you remove the “say” command in the end it’s actually pretty readable: pagerbak commit VA17, 34 minutes ago. pagerbak commit […]

I made this addition today after (once again) struggling with option groups for a nested Rails model. My solution: create a new tag for FormOptionsHelper: grouped_select http://gist.github.com/179075

UPDATE 9 hours later: Changed to “remote = origin” to the specific branch “remote = dean” which works! Short explanation on how to pull changes from different Git repositories into your local Git repository. Last week I worked with three different Github forks of a project. Now for standard, when you clone a Github repository, […]

Many of my colleagues know svn but are in general not (yet) ready jump over to using Git for bigger projects. Today I had to import my existing Git repository into SVN. I had been working locally with a Git repos and wanted to keep my history before giving access to my colleagues. The guide […]

My problem this week: I wanted to share some work with a colleague. Unfortunately we have not yet setup our caplab environment with git server. Nor did i want to push this particular project to GitHub or Unfuddle. My alternative was a file-based setup: Each developer’s machine has it’s own Git repository. On my machine […]

A side benefit of switching from Subversion to Git for source control is that Git does not use shadow files and directories to find out what has changed. I created two checkouts of a svn project — one using traditional svn and one using git (which can actually clone a svn repos — see explanation […]

If you’re using Resource Controller for Ruby on Rails, you may want to look atthe plugin I just created. From the readme file: ResouceControllerRespondTo ========================== Extends ResourceController plugin for Rails to make it respond_to .xml and .json formats Based on code by Florent Piteau and Joe Fiorini… Jesper merely provided the glue and packed as […]