Module: WWW::Delicious::XMLUtils
- Included in:
- REXML::Element
- Defined in:
- lib/www/delicious.rb
Overview
:nodoc:
Instance Method Summary collapse
-
#if_attribute_value(xmlattr, &block) ⇒ Object
Returns the
xmlattr
attribute value for currentREXML::Element
. -
#if_element(expression, &block) ⇒ Object
Executes the content of
block
onexpression
child of this element, if it exists. -
#if_element_value(expression, &block) ⇒ Object
Returns the value of
expression
child of this element, if it exists.
Instance Method Details
#if_attribute_value(xmlattr, &block) ⇒ Object
Returns the xmlattr
attribute value for current REXML::Element
.
If block is given and attribute value is not nil, the content of the block is executed.
Examples
dom = REXML::Document.new('<a name="1"><b>foo</b><b>bar</b></a>')
dom.root.if_attribute_value(:name)
# => "1"
dom.root.if_attribute_value(:name) { |v| v.to_i }
# => 1
dom.root.if_attribute_value(:foo)
# => nil
dom.root.if_attribute_value(:name) { |v| v.to_i }
# => nil
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# File 'lib/www/delicious.rb', line 872 def if_attribute_value(xmlattr, &block) #:nodoc: value = if attr = self.attribute(xmlattr.to_s) attr.value else nil end value = yield value if !value.nil? and block_given? value end |
#if_element(expression, &block) ⇒ Object
Executes the content of block
on expression
child of this element, if it exists. Returns the result or nil
if xmlelement
doesn’t exist.
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# File 'lib/www/delicious.rb', line 900 def if_element(expression, &block) raise LocalJumpError, "no block given" unless block_given? if element = self.elements[expression.to_s] yield element else nil end end |
#if_element_value(expression, &block) ⇒ Object
Returns the value of expression
child of this element, if it exists. If blog is given, block is called on expression
element value and the result is returned.
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# File 'lib/www/delicious.rb', line 887 def if_element_value(expression, &block) if_element(expression) do |element| value = element.text value = yield value if block_given? value end end |