first(element, path=nil, namespaces=nil, variables={})
Class Public methods
Finds and returns the first node that matches the supplied xpath.
- element
-
The context element
- path
-
The xpath to search for. If not supplied or nil, returns the first node matching '*'.
- namespaces
-
If supplied, a Hash which defines a namespace mapping.
- variables
-
If supplied, a Hash which maps $variables in the query to values. This can be used to avoid XPath injection attacks or to automatically handle escaping string values.
1 2 3 4 | XPath.first( node )XPath.first( doc, "//b"} )XPath.first( node, '/book/publisher/text()=$publisher', {}, {"publisher"=>"O'Reilly"}) |
Please login to continue.