mobile | mac | business | development blog
Thank you for so much, Steve.
I was deeply moved by Your commencement speech in Stanford as I am when I watch it today …
I had a lot of trouble with some rubygem warnings after upgrading to Ruby 1.9.1 and Rails 3.0 on Mac OS x Snow Leopard. They always occurred when I started the server within the project with the command
At first, when running on bundler 0.9.3, I had two types of errors. The first NoMethodError populated the terminal with hundreds lines of code, like …
WARNING: # NoMethodError: undefined method ` ' for nil:NilClass # -*- encoding: utf-8 -*- ... WARNING: Invalid .gemspec format in \ '.rvm/gems/ruby-1.9.1-p378/specifications/spec.gemspec'
The bundler-team around Carlhuda fixed that issue within bundler 0.9.4. So that problem will not occur any more.
The other problem was quite persistent. When starting the server via
or doing a test via
within the rails-3-project resulted in a bunch of warnings:
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:14: \ warning: already initialized constant VERSION /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:14: \ warning: already initialized constant RubyGemsVersion /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:194: \ warning: already initialized constant MUTEX /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:196: \ warning: already initialized constant RubyGemsPackageVersion /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:202: \ warning: already initialized constant WIN_PATTERNS /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:1079:\ warning: already initialized constant MARSHAL_SPEC_DIR /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:1084: \ warning: already initialized constant YAML_SPEC_DIR /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/version.rb:72: \ warning: already initialized constant VERSION_PATTERN /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/requirement.rb:20: \ warning: already initialized constant OPS /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/requirement.rb:30: \ warning: already initialized constant OP_RE /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/version.rb:246: \ warning: already initialized constant Requirement /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:18: \ warning: already initialized constant TYPES /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/platform.rb:171: \ warning: already initialized constant RUBY /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/platform.rb:177: \ warning: already initialized constant CURRENT /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:39: \ warning: already initialized constant NONEXISTENT_SPECIFICATION_VERSION /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:50: \ warning: already initialized constant CURRENT_SPECIFICATION_VERSION /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:56: \ warning: already initialized constant SPECIFICATION_VERSION_HISTORY /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:72: \ warning: already initialized constant MARSHAL_FIELDS /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:75: \ warning: already initialized constant TODAY /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/source_index.rb:593: \ warning: already initialized constant Cache /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:14: \ warning: already initialized constant DEFAULT_BACKTRACE /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:15: \ warning: already initialized constant DEFAULT_BENCHMARK /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:16: \ warning: already initialized constant DEFAULT_BULK_THRESHOLD /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:17: \ warning: already initialized constant DEFAULT_VERBOSITY /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:18: \ warning: already initialized constant DEFAULT_UPDATE_SOURCES /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:24: \ warning: already initialized constant OPERATING_SYSTEM_DEFAULTS /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:30: \ warning: already initialized constant PLATFORM_DEFAULTS /usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:53: \ warning: already initialized constant SYSTEM_WIDE_CONFIG_FILE
Jeremy Kemper from the Rails core team pointed out that this is not a Rails problem, but a RubyGems issue. Ruby 1.9 ships with an outdated RubyGems … like 1.9.1p378 ships with RubyGems 1.3.1. I did update RubyGems to Version 1.3.5 by
sudo gem update --system
but this resulted in some duplicated rubygem files, which cause the error.
So how can the problem be solved? Deleting and reinstalling Ruby 1.9.1 does not have any effect … but the solution is quite simple:
1. Be sure that you do NOT install RubyGems 1.3.5 separately after the installation of Ruby 1.9.1 – this would result in a double installation. So have that in mind when following the excellent instructions to installing Ruby, RubyGems, and Rails on Snow Leopard of Dan Benjamin.
2. If you already installed Ruby 1.9.1, updated to RubyGems 1.3.5 and bundler 0.9.4 and also installed Rails 3.0, the only thing you have to do is:
sudo gem uninstall rubygems-update
That’s it. No errors any more!
1. You may start with Dan Benjamin’s recipe and modify it so you download, make and install the ruby-1.9.1-p378.tar.gz but NOT the rubygems-1.3.5.tgz.
2. Then update RubyGems with the command
sudo gem update --system
3. Ensure that the rake and the sqlite3-ruby gems are installed, too.
4. Now install the needed gems and rails –pre as described in the Rails 3.0 beta release notes
5. After the successful installation of Rails 3.0 beta, you now have to do the vitally important step:
sudo gem uninstall rubygems-update
6. Finally check, if any gem needs an update before diving into Rails 3.0 by
sudo gem update
Hope this helps … and saves some time. Thx Andy for the hint
MAMP, a local webserver environment for the Mac, is perfect for testing, developing and designing with WordPress. MAMP comes with a ready to use configuration of Apache, MySQL and PHP in a single folder.
But after installing and configuring a WordPress blog, you may loose the access to the MAMP start page:
You don’t have permission to access /MAMP/ on this server.
Apache/2.0.63 (Unix) PHP/5.2.11 DAV/2 Server at localhost Port XXXX
That’s a big issue, as the start page links to the local phpMyAdmin page for MySQL-database configuration. So you cannot admin the database anymore.
I traced down the problem to a wrong placed file: When I configured the WordPress installation via the web-interface, an .htaccess file was placed in the root directory of my harddrive. Quite scary … but a problem which can be fixed easily
As always: no guarantee and on your own risk … especially the Terminal is a wonderful tool … but if you do the wrong thing, you may be in serious trouble!
You normally do not recognize the .htaccess file within the Finder: all filenames starting with a dot are hidden files in a UNIX system … and the Finder does not show those hidden files. But if you use the Terminal, you can look at all the hidden files easily.
So fire up the Terminal app and go to the root directory of your hard drive:
then looks at all the files in your root directory:
If you find a .htaccess there … you probably found your problem. But look inside the file before your rename or delete it:
The easiest way to proceed is to rename the htaccess file:
mv .htaccess htaccess-backup
This way the file is shown in the Finder again and does not confuse your MAMP installation. If you know what to do you can delete the renamed file now within the Finder and drag it to the trash
Adobe announced the export capability from Adobe Flash Professional CS5 to built native iPhone apps. This is the next round in the battle for market shares in the field of mobile application platforms.
Adobe tried to position Flash with their shrinked down Flash Light as a global OS independent application development platform for mobile devices. Today more than 800 million mobile devices are Flash Light enabled. It looked like they found the philosopher’s stone – but when you dig deeper, Adobe is facing a lot of issues:
But on March 6, 2008 an other threat to Flash and Flash Light appeared: Steve Jobs introduced the iPhone SDK which provided a easy way to create third party applications for the iPhone with high mobile performance and the ability to take advantage of most of the sensors – like touchsceen, accelerometer, microphone, camera. And Apple solved one of the biggest hurdles for mobile application developers: They provided an easy application store solution for the developers to sell their apps or distribute them for free. And also the market for these native iPhone applications is quite attractive: There are more than 50 million iPhones and iPod touch devices out there – all of them having the exact same screen size, all of them having a touch sceen, all of them having an accelerometer. Apple attracted a lot of independent developers as well the big names in game industry with their mobile application ecosystem.
Bringing Flash support to the iPhone Safari web browser was blocked by Apple because of those big performance issues. Apple also did not license Flash Light for the iPhone – quite logic because they built up their own developer base and their own mobile app ecosystem.
The only chance Adobe had was to built up an “injection”-strategy and develop their Flash authoring tool into an Objective-C & Cocoa code generator which allows Flash developers to create native iPhone applications by the press of a button. Then the Flash developers can upload their app to the iTunes AppStore and use it as a selling and distribution channel.
This probably wasn’t an easy job and it will be quite interesting to watch Apple’s reaction on this move. It probably will have a massive effect on the AppStore as this will flood the store with new apps: More creativity and more junk.
Louis Gerbarge spotted the technical issues of the Adobe Flash to native iPhone code generation – and takes a look on the performance and private API issues of the beta version of the CS5 solution. His post makes clear that taking the Flash way won’t offer the Flash developers the features and beauty of the uncountable iPhone SDK 3.x APIs.
The registration for the – again – biggest Ruby-on-Rails conference in the US is now open: RailsConf 2009. O’Reilly organizes the conference again. but this time it’s not Portland but Las Vegas where the rails community meets again. Las Vegas is not only the US center of gambling and entertainment – it’s also one of the much sought-after conference locations
If you register before March 16th 11:59pm you’ll get an early-bird bonus and save 200 USD.
All rails-pros who want to share their knowledge and give a presentation at the conference, the Call for Participation deadline is extended to February 17th 2009. So you have to be fast!
The conference will be at the Las Vegas Hilton from May 4th to 7th 2009.
Viva Las Vegas!