Working with Nokogiri::XML::Node with Rails

I am using gem 'nokogiri' for Nokogiri::XML::Node manipulations.here are the some examples of performing the basics operations on the Nokogiri::XML::Node.
you can perform these operations with Nokogiri::XML::Node.

say for the example you have the Nokogiri::XML::Node named node,now here are some basic operation with this node.

1.Get parent: you can fetch the parent of the node by,
node.parent // will return the parent of the node.

2. Get xpath :
node.path // will return of the xpath of the node in document.
 

3.Get node at some path in document:
_node = doc.xpath('some_path')
where doc is a nokogiri document.it will return a nodeset if you want to get the exact node then do this

_node = doc.xpath('some_path')[0] or _node = doc.xpath('some_path').first

4.Get children:
node.children // will return the nodeset of childs of node your can select them according to your need.

5.Add children:
node.add_child('child_html') // add child in as the last child.

6.Add siblings:
node.add_next_sibling('some_html') // add a sibling node after the node in parent.
node.add_previous_sibling('some_html') // add a sibling node before the node in parent node.

7.Replace a node:
node.replace('replace_node's_html')// replace a node by given html.

8. Styling a node:
node['class'] = 'some_css_class' // add a css class to node.
css_class = node['class'] // get the css_class of the node.

9. Show html:
node.to_html // will return html of the node.