Rubular: a really usefull ruby regex tool
Working with regular expressions is always a try and fail and retry … experience. It really helps to have an interactive tool with which to tune up your expr...
Recent posts
How to evaluate an xpath in chrome ?
According to stack overflow, simply use something like the following from the chrome console : $x("//img")
How to stub around a call to the original method with rspec ?
Update 05/23/2014: I created a gem for this, read an introduction here
#1 rule for monitoring emails
I just spent a few hours debugging my rails app on Heroku to understand why the hell I did not systematically receive the monitoring emails that my app was s...
The poor man’s memory profiling
While working on www.mes-courses.fr, a background scheduled task that was running fine on heroku started to fail with out of memory errors. After searching a...
TOO_MANY_REDIRECTS when changing ssl requirements
While I was trying to enforce no ssl on a page of www.mes-courses.fr with Rack::SslEnforcer, I lost a few hours trying to fix a TOO_MANY_REDIRECTS error … Th...
How to copy a database from an heroku app to another
For mes-courses.fr, I am using another heroku app as “integration” app, where I can do late verifications before deploying to my production app. If you don’t...
How to install a patched ruby interpreter with rbenv and ruby-build
A background scheduled task I am trying to run on heroku is failing because it gets out of memory. I needed to use a ruby memory profiler to understand exact...