Would you be interested in reading such a book?
So a few days ago we started seeing the following errors on our Jenkins builds (swapped with fictional model and attribute names):
NoMethodError: undefined method `attack_power=' for #<Ironman:0x00000008525d20>
attack_power is a new attribute we recently added to the
Ironman ActiveRecord model.
I was baffled, as the table column is clearly there but ActiveRecord couldn’t see it.
It was the first time I presented in front of 400+ people so I was really nervous - I blasted through the talk in under 30 minutes even though I was supposed to talk for 45 minutes, oh well. ;)
Also, my slides are available too.
P.S. If you’re located in China, you may view the talk at Railscasts China.
A week ago I went to Shanghai, China to attend and to give a talk at RubyConf China. The day before the conference’s first day a bunch of us were invited to a VIP dinner where we met with Matz and got to play with a device running MRuby. And I heard that earlier on that day Matz was ‘adopted’ by a book publisher to do an interview.
I have found the interview (in Chinese), and found it to be really useful. So I translated it to English. Hope more people will like it. :)
On November 16th, 2012 - a day before RubyConf China, a Chinese book publisher Turing Book has done an interview with Matz on his new book The Future of Computing as well as about a few topics interested to Chinese readers. The interview was conducted by The Future of Computing’s Chinese translator Zi Heng Zhou.
Contrary to what the title of the talk suggests, I am by no means a superstar developer myself. Though I would like to think that I am extremely passionate about what I do, therefore I love to share my thoughts and tips on web development and software engineering.
Below is the version I used for my actual talk:
Since I had been preparing for my talk for over a month, I’ve done many revisions to my slides. Here’s an uncut version that contains every single slide since day one:
Hope you will enjoy them! :)
Update: The video of my talk is up! :)
I had such a wonderful time at RubyConf China! So here are some photos from the conference. :)
Gallery of photos of yours truly on stage:
Gallery of photos I took mostly on the VIP dinner event the day before the conference:
The other day a colleague asked whether or not it’s possible to have SimpleCov return a group that only contains uncommitted changes.
The answer is yes! After some digging around, we found the following way:
# in spec_helper.rb SimpleCov.start 'rails' do add_group 'Changed' do |source_file| `git ls-files --exclude-standard --others \ && git diff --name-only \ && git diff --name-only --cached`.split("\n").detect do |filename| source_file.filename.ends_with?(filename) end end end
git ls-files --exclude-standard --others for untracked files,
git diff --name-only for unstaged files and
git diff --name-only --cached for staged files.
It is fairly simple to use, with the flexibility of adding and removing observers for state transitions.
Recently Node.js has made some changes so that it no longer installs on OS X via homebrew if you don’t have Xcode installed.
If you run
brew install nodejs, you will get the following error:
> Error: Failed executing: make install (node.rb:28)
And if you run
brew install -v nodejs, you will discover this line:
> xcode-select: Error: No Xcode is selected. Use xcode-select -switch , or see the xcode-select manpage (man xcode-select) for further information.
The fix? It’s actually quite easy, simply do:
sudo xcode-select --switch /usr/bin
And voila! You can now install Node.js just fine. :)
Don’t you just hate it when you have a fresh intall of Mountain Lion, RVM and some rubies - then all of a sudden you hit this
OpenSSL::SSL::SSLError error message:
SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed
The fix is quite simple actually, all you need to do is to download a CA root certificate:
curl http://curl.haxx.se/ca/cacert.pem -o ~/.rvm/usr/ssl/cert.pem
And that’s it! Enjoy!
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