Article 23
A couple of MacPorts errors I just encountered:Error: Unable to execute port: can't read "frameworks_dir": no such variableI had version 1.6 and it seems the recommendation to fix this is to update to...
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When sorting complex structures in Perl is is common to use syntax like:sort { $lname{$a} <=> $lname{$b} || $fname{$a} <=> $fname{$b} } @namesThe Perl sort documentation lists examples with...
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Speaking of Perl, Ruby and sorting, sort in both Perl and Ruby allow you to specify a code block to implement your own arbitrary sorting routine. Perl's documentation shows you how you can define this...
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I was working on building the mysql ruby gem. My mysql install is in a non-standard location. I could get the gem to build with syntax like:gem install mysql --...
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With the Oracle client 10.2.0.1.0 installer if you are automating the install with a response file, set UNIX_GROUP_NAME to something like say 'dba', then run the install but you are not in the dba...
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Update: SourceForge no longer offers the Wikispaces wiki, this post is left up for historical curiosity.The default wiki for SourceForge projects is used to be called Wikispaces. The CSS stylesheet...
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How to insert a new line above the current line in TextMate? A la capital O in vi? I couldn't find it in the TextMate book, nor searching around online. A few seconds of fiddling on the keyboard turned...
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Excel on the Mac defaults to portrait mode. Nearly all spreadsheets I create I want in landscape and finally tracked down how to set this as the default.Open up a new documentSet it to landscape via...
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I've been using the workaround shown at http://blog.zenspider.com/2008/05/httpsssl-warning-cleanup.html for a while now to eliminate the "using default DH parameters" warning you get when using https...
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If your Ruby app using https or some other form of SSL is complaining about:net/http.rb:567: warning: can't set verify locationsThen you probably passed in a bogus path to your CA file or path. In my...
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I needed to set the UID for an account on my Mac OS X 10.6 (Snow Leopard) box. Various posts online said that you can right click on an account in System Preferences -> Accounts to access the...
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User-Friendly RESTful Routes in Rails RESTful routes created via map.resources use the :id field for URLs for individual resources. I.e. if user 'joebob' has an id of 42 then the URL for his resource...
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Filesystem Hierarchy Standard for Mac OS X I frequently refer to the Filesystem Hierarchy Standard when trying to figure out where to put files on Linux systems. I recently started doing some Mac...
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I'm working on a MacRuby project in Xcode. I upgraded Xcode from 4.0 to 4.0.1 and Interface Builder stopped working right for my project. New outlets weren't showing up so I couldn't connect them to...
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Upgraded to Mac OS 10.7 (Lion)? Tried to update Macports with sudo port selfupdate and get: Error: /opt/local/bin/port: port selfupdate failed: Error installing new MacPorts base: shell command failed...
View ArticlePython Packages
I'm new to the Python and Django world, having primarily worked with Ruby and Ruby on Rails for the last few years. In reading about how to manage dependencies several folks referred to pip and...
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FIOS Router CLI and DHCP I recently got Verizon FIOS service. The router Verizon provides is an Actiontec MI424WR. Verizon goes to some trouble to hide the Actiontec branding; but, for example, the...
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Ruby, OptionParser, and Switches with Optional Arguments Ruby's OptionParser supports switches with optional arguments. Both the official documentation and the pickaxe book give examples of various...
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Versioning RESTful APIs There seems to be general (but definitely not complete) consensus among REST experts that the proper way to version a REST API is via custom MIME/media types. You can Google...
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Rails, as_json, undefined method `serializable_hash' as_json was failing in one of my Rails models with: NoMethodError: undefined method `serializable_hash' for ["id", 3]:Array Eventually figured out...
View ArticleRails.root is the new Rails.configuration.root_path
In older versions of Rails the Rails.configuration.root_path method would give you the base directory of your application in the filesystem. In Rails 3 this is now Rails.root.
View ArticleRails, simple_form, Twitter Bootstrap, and append
I wanted to put a little delete button at the end of a form field. We start with the standard simple_form syntax for a form field. <%= f.input :name %> The generated HTML has the form elements...
View ArticleReporting Input Errors from a Rails Model
There are several places outside of the standard validations where you might process user input in a Rails model and want to inform the user that they supplied bad data. It is not immediately obvious...
View ArticleRaspberry Pi, Raspian Debian Wheezy, Boot Single User Mode
In short, eject the SD card from your Pi, mount it somewhere, and add "single" to the end of cmdline.txt. I was able to stick the card in my Mac and edit the file. Eject the card from that computer,...
View ArticleKerberos propagation and unusual networking
My Kerberos servers are scattered around the Internet, behind NAT in some cases, connected with VPNs, etc. As such the hostname or IP that one server might use to connect to another is often different...
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