shunwen shunwen

## mountain-lion-brew-setup.markdown

      
              1 file
            
          
              74 forks
            
          
              64 comments
            
          
              280 stars
            
          
                myobie
                / mountain-lion-brew-setup.markdown
            
            
              Created
              February 18, 2012 20:14
            
              
                Get Mountain Lion and Homebrew to Be Happy
              
          
    Get Mountain Lion and Homebrew to Be Happy

1) Install XCode 4.4 into /Applications

Get it from the App Store.
2) Install Command Line Tools

In XCode's Preferences > Downloads you can install command line tools.

  
## NokogiriXPathNamespaces
2 ways to extract elements from within XML namespaces using Nokogiri
When trying to select elemenets in the default namespace, e.g. "xmlns= http://www.w3.org/2005/Atom", try the following two ways. Note the xmlns=" attribute on entry element:

Original xml:
Nokogiri::XML(@xml_string).xpath("//author/name").each do |node|
    puts node
  end


1. Define a namespace context for your XPath expression and point your XPath steps to match elements in that namespace. Define a namespace-to-prefix mapping and use this prefix (a) in the XPath expression.
	2 ways to extract elements from within XML namespaces using Nokogiri
	When trying to select elemenets in the default namespace, e.g. "xmlns= http://www.w3.org/2005/Atom", try the following two ways. Note the xmlns=" attribute on entry element:

	Original xml:
	Nokogiri::XML(@xml_string).xpath("//author/name").each do \|node\|
	puts node
	end


	1. Define a namespace context for your XPath expression and point your XPath steps to match elements in that namespace. Define a namespace-to-prefix mapping and use this prefix (a) in the XPath expression.