Snipplr - cczona

(Other) port install ruby -> malloc error

Thu, 10 Jul 2008 04:35:47 GMT

'port install ruby' sometimes results in malloc errors near the final phase (just after destroot completes). It appears that macports may be out of memory while installing documentation.

(Bash) Add paths to Ruby 'require'

Mon, 12 May 2008 17:52:58 GMT

Suppose you created a script chart.rb in /home/foo/ruby/mylib direcory. Now, you want to use this in the app.rb located in /home/foo/ruby/scripts. In ~/.bash_profile:

(Ruby) Irb power tricks with Wirble & Utility-Belt

Fri, 28 Mar 2008 12:24:12 GMT

Note: most of these will be available to the shell and Rails' console too.

(Rails) Rails link to an image instead of text

Fri, 28 Mar 2008 11:49:22 GMT

(Ruby) Haml 'nesting within a tag' error

Fri, 28 Mar 2008 11:28:26 GMT

"When using haml, an HTML tag is represented using %tagname, but in the case of an HTML tag with attributes, the representation is %tagname{:attribute => value}. It turns out there must be no whitespace between %tagname and {:attribute => value}. This was the source of a lot of errors when I was trying to write haml forms, since the error message was the cryptic: Illegal Nesting: Nesting within a tag that already has content is illegal."

(Rails) Rendering partials in Rails 2.0

Fri, 28 Mar 2008 05:08:36 GMT

"The new naming scheme for template (eg. .html.erb) does not seem to work for partials. When using :partial => 'form' a filename "_form.html.erb" is not recognized. " Rails now requires the partial to be referenced by dotted format

(Ruby) order/format of params in method definition

Mon, 24 Mar 2008 22:41:16 GMT

See also p. 348 ("Invoking a Method") of Pickaxe 2nd edition

(Ruby) What version of Ruby and Rails is this using?

Mon, 24 Mar 2008 14:25:44 GMT

(Ruby) Ruby heredoc tricks

Fri, 14 Mar 2008 19:31:08 GMT

Following a

(Ruby) Use regex to match a Ruby substring, and reference it like an index

Thu, 13 Mar 2008 21:41:41 GMT

(Ruby) to_str vs to_s

Thu, 13 Mar 2008 21:25:21 GMT

(Ruby) optimize Ruby memory usage by avoiding string accumulation

Thu, 13 Mar 2008 18:55:05 GMT

(Ruby) make Ruby strings behave like files

Thu, 13 Mar 2008 18:38:19 GMT

This is handy for testing, when you need to simulate an open file or open URI. Why, and the Pickaxe book, have better examples

(Other) parse URI object, and fetch response from it, in one step

Thu, 13 Mar 2008 16:26:14 GMT

URI objects can be opened directly by open-uri

(Ruby) Execute arbitrary code with different level of error messaging

Thu, 13 Mar 2008 03:27:01 GMT

You can turn off warnings for a section of your code by setting $VERBOSE to nil. Even better is to codify this in a method. Since this method takes a block as its parameter, you can now pass it arbitrary chunks of code to execute without warnings.

(Ruby) 'uninitialized constant Gem::GemRunner'

Thu, 13 Mar 2008 00:00:08 GMT

(Ruby) CGI library gotcha

Wed, 12 Mar 2008 23:58:07 GMT

Beware of requiring 'CGI'. There's trouble in them thar hills/