Flowdock
each_element_with_attribute( key, value=nil, max=0, name=nil ) public

Iterates through the child elements, yielding for each Element that has a particular attribute set.

key:the name of the attribute to search for
value:the value of the attribute
max:(optional) causes this method to return after yielding for this number of matching children
name:(optional) if supplied, this is an XPath that filters the children to check.
 doc = Document.new "<a><b @id='1'/><c @id='2'/><d @id='1'/><e/></a>"
 # Yields b, c, d
 doc.root.each_element_with_attribute( 'id' ) {|e| p e}
 # Yields b, d
 doc.root.each_element_with_attribute( 'id', '1' ) {|e| p e}
 # Yields b
 doc.root.each_element_with_attribute( 'id', '1', 1 ) {|e| p e}
 # Yields d
 doc.root.each_element_with_attribute( 'id', '1', 0, 'd' ) {|e| p e}
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