REXML::Elements

<<(element=nil)

#

An alias for add

[]( index, name=nil)

#

          
            # File tmp/rubies/ruby-2.3.8/lib/rexml/element.rb, line 766
def []( index, name=nil)
  if index.kind_of? Integer
    raise "index (#{index}) must be >= 1" if index < 1
    name = literalize(name) if name
    num = 0
    @element.find { |child|
      child.kind_of? Element and
      (name.nil? ? true : child.has_name?( name )) and
      (num += 1) == index
    }
  else
    return XPath::first( @element, index )
    #{ |element|
    #       return element if element.kind_of? Element
    #}
    #return nil
  end
end

Fetches a child element. Filters only Element children, regardless of the XPath match.

index: the search parameter. This is either an Integer, which will be used to find the index’th child Element, or an XPath, which will be used to search for the Element. Because of the nature of XPath searches, any element in the connected XML document can be fetched through any other element. The Integer index is 1-based, not 0-based. This means that the first child element is at index 1, not 0, and the +n+th element is at index n, not n-1. This is because XPath indexes element children starting from 1, not 0, and the indexes should be the same.
name: optional, and only used in the first argument is an Integer. In that case, the index’th child Element that has the supplied name will be returned. Note again that the indexes start at 1.
Returns: the first matching Element, or nil if no child matched

doc = Document.new '<a><b/><c id="1"/><c id="2"/><d/></a>'
doc.root.elements[1]       #-> <b/>
doc.root.elements['c']     #-> <c id="1"/>
doc.root.elements[2,'c']   #-> <c id="2"/>

[]=( index, element )

#

lib/rexml/element.rb View on GitHub

          
            # File tmp/rubies/ruby-2.3.8/lib/rexml/element.rb, line 798
def []=( index, element )
  previous = self[index]
  if previous.nil?
    @element.add element
  else
    previous.replace_with element
  end
  return previous
end

Sets an element, replacing any previous matching element. If no existing element is found ,the element is added.

index: Used to find a matching element to replace. See []().
element: The element to replace the existing element with the previous element
Returns: nil if no previous element was found.

doc = Document.new '<a/>'
doc.root.elements[10] = Element.new('b')    #-> <a><b/></a>
doc.root.elements[1]                        #-> <b/>
doc.root.elements[1] = Element.new('c')     #-> <a><c/></a>
doc.root.elements['c'] = Element.new('d')   #-> <a><d/></a>

add(element=nil)

#

lib/rexml/element.rb View on GitHub

          
            # File tmp/rubies/ruby-2.3.8/lib/rexml/element.rb, line 874
def add element=nil
  if element.nil?
    Element.new("", self, @element.context)
  elsif not element.kind_of?(Element)
    Element.new(element, self, @element.context)
  else
    @element << element
    element.context = @element.context
    element
  end
end

Adds an element

element: if supplied, is either an Element, String, or Source (see Element.initialize). If not supplied or nil, a new, default Element will be constructed
Returns: the added Element

a = Element.new('a')
a.elements.add(Element.new('b'))  #-> <a><b/></a>
a.elements.add('c')               #-> <a><b/><c/></a>

collect( xpath=nil ) { |e| ... }

#

lib/rexml/element.rb View on GitHub

          
            # File tmp/rubies/ruby-2.3.8/lib/rexml/element.rb, line 906
def collect( xpath=nil )
  collection = []
  XPath::each( @element, xpath ) {|e|
    collection << yield(e)  if e.kind_of?(Element)
  }
  collection
end

No documentation available

delete(element)

#

lib/rexml/element.rb View on GitHub

          
            # File tmp/rubies/ruby-2.3.8/lib/rexml/element.rb, line 838
def delete element
  if element.kind_of? Element
    @element.delete element
  else
    el = self[element]
    el.remove if el
  end
end

Deletes a child Element

element: Either an Element, which is removed directly; an xpath, where the first matching child is removed; or an Integer, where the n’th Element is removed.
Returns: the removed child

doc = Document.new '<a><b/><c/><c id="1"/></a>'
b = doc.root.elements[1]
doc.root.elements.delete b           #-> <a><c/><c id="1"/></a>
doc.elements.delete("a/c[@id='1']")  #-> <a><c/></a>
doc.root.elements.delete 1           #-> <a/>

delete_all( xpath )

#

lib/rexml/element.rb View on GitHub

          
            # File tmp/rubies/ruby-2.3.8/lib/rexml/element.rb, line 853
def delete_all( xpath )
  rv = []
  XPath::each( @element, xpath) {|element|
    rv << element if element.kind_of? Element
  }
  rv.each do |element|
    @element.delete element
    element.remove
  end
  return rv
end

Removes multiple elements. Filters for Element children, regardless of XPath matching.

xpath: all elements matching this String path are removed.
Returns: an Array of Elements that have been removed

doc = Document.new '<a><c/><c/><c/><c/></a>'
deleted = doc.elements.delete_all 'a/c' #-> [<c/>, <c/>, <c/>, <c/>]

each( xpath=nil ) { |e| ... }

#

lib/rexml/element.rb View on GitHub

          
            # File tmp/rubies/ruby-2.3.8/lib/rexml/element.rb, line 902
def each( xpath=nil )
  XPath::each( @element, xpath ) {|e| yield e if e.kind_of? Element }
end

Iterates through all of the child Elements, optionally filtering them by a given XPath

xpath: optional. If supplied, this is a String XPath, and is used to filter the children, so that only matching children are yielded. Note that XPaths are automatically filtered for Elements, so that non-Element children will not be yielded

doc = Document.new '<a><b/><c/><d/>sean<b/><c/><d/></a>'
doc.root.elements.each {|e|p e}       #-> Yields b, c, d, b, c, d elements
doc.root.elements.each('b') {|e|p e}  #-> Yields b, b elements
doc.root.elements.each('child::node()')  {|e|p e}
#-> Yields <b/>, <c/>, <d/>, <b/>, <c/>, <d/>
XPath.each(doc.root, 'child::node()', &block)
#-> Yields <b/>, <c/>, <d/>, sean, <b/>, <c/>, <d/>

empty?

#

lib/rexml/element.rb View on GitHub

          
            # File tmp/rubies/ruby-2.3.8/lib/rexml/element.rb, line 809
def empty?
  @element.find{ |child| child.kind_of? Element}.nil?
end

Returns true if there are no Element children, false otherwise

index(element)

#

lib/rexml/element.rb View on GitHub

          
            # File tmp/rubies/ruby-2.3.8/lib/rexml/element.rb, line 816
def index element
  rv = 0
  found = @element.find do |child|
    child.kind_of? Element and
    (rv += 1) and
    child == element
  end
  return rv if found == element
  return -1
end

Returns the index of the supplied child (starting at 1), or -1 if the element is not a child

element: an Element child

inject( xpath=nil, initial=nil ) { |initial, e| ... }

#

lib/rexml/element.rb View on GitHub

          
            # File tmp/rubies/ruby-2.3.8/lib/rexml/element.rb, line 914
def inject( xpath=nil, initial=nil )
  first = true
  XPath::each( @element, xpath ) {|e|
    if (e.kind_of? Element)
      if (first and initial == nil)
        initial = e
        first = false
      else
        initial = yield( initial, e ) if e.kind_of? Element
      end
    end
  }
  initial
end

No documentation available

literalize(name)

#

lib/rexml/element.rb View on GitHub

          
            # File tmp/rubies/ruby-2.3.8/lib/rexml/element.rb, line 954
def literalize name
  name = name[1..-2] if name[0] == ?' or name[0] == ?"               #'
  name
end

Private helper class. Removes quotes from quoted strings

size

#

lib/rexml/element.rb View on GitHub

          
            # File tmp/rubies/ruby-2.3.8/lib/rexml/element.rb, line 933
def size
  count = 0
  @element.each {|child| count+=1 if child.kind_of? Element }
  count
end

Returns the number of Element children of the parent object.

doc = Document.new '<a>sean<b/>elliott<b/>russell<b/></a>'
doc.root.size            #-> 6, 3 element and 3 text nodes
doc.root.elements.size   #-> 3

to_a( xpath=nil )

#

lib/rexml/element.rb View on GitHub

          
            # File tmp/rubies/ruby-2.3.8/lib/rexml/element.rb, line 946
def to_a( xpath=nil )
  rv = XPath.match( @element, xpath )
  return rv.find_all{|e| e.kind_of? Element} if xpath
  rv
end

Returns an Array of Element children. An XPath may be supplied to filter the children. Only Element children are returned, even if the supplied XPath matches non-Element children.

doc = Document.new '<a>sean<b/>elliott<c/></a>'
doc.root.elements.to_a                  #-> [ <b/>, <c/> ]
doc.root.elements.to_a("child::node()") #-> [ <b/>, <c/> ]
XPath.match(doc.root, "child::node()")  #-> [ sean, <b/>, elliott, <c/> ]

new(parent)

<<(element=nil)

[]( index, name=nil)

[]=( index, element )

add(element=nil)

collect( xpath=nil ) { |e| ... }

delete(element)

delete_all( xpath )

each( xpath=nil ) { |e| ... }

empty?

index(element)

inject( xpath=nil, initial=nil ) { |initial, e| ... }

literalize(name)

size

to_a( xpath=nil )