Class: REXML::Parent (Ruby 2.3.4)

In Files

  • rexml/parent.rb

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REXML::Parent

A parent has children, and has methods for accessing them. The Parent class is never encountered except as the superclass for some other object.

Public Class Methods

new(parent=nil)

Constructor @param parent if supplied, will be set as the parent of this object

 
               # File rexml/parent.rb, line 13
def initialize parent=nil
  super(parent)
  @children = []
end
            

Public Instance Methods

<<( object )
Alias for: push
[]( index )

Fetches a child at a given index @param index the Integer index of the child to fetch

 
               # File rexml/parent.rb, line 57
def []( index )
  @children[index]
end
            
[]=( *args )

Set an index entry. See Array.[]= @param index the index of the element to set @param opt either the object to set, or an Integer length @param child if opt is an Integer, this is the child to set @return the parent (self)

 
               # File rexml/parent.rb, line 70
def []=( *args )
  args[-1].parent = self
  @children[*args[0..-2]] = args[-1]
end
            
add( object )
 
               # File rexml/parent.rb, line 18
def add( object )
  object.parent = self
  @children << object
  object
end
            
Also aliased as: push
children()
Alias for: to_a
deep_clone()

Deeply clones this object. This creates a complete duplicate of this Parent, including all descendants.

 
               # File rexml/parent.rb, line 148
def deep_clone
  cl = clone()
  each do |child|
    if child.kind_of? Parent
      cl << child.deep_clone
    else
      cl << child.clone
    end
  end
  cl
end
            
delete( object )
 
               # File rexml/parent.rb, line 32
def delete( object )
  found = false
  @children.delete_if {|c| c.equal?(object) and found = true }
  object.parent = nil if found
  found ? object : nil
end
            
delete_at( index )
 
               # File rexml/parent.rb, line 47
def delete_at( index )
  @children.delete_at index
end
            
delete_if( &block )
 
               # File rexml/parent.rb, line 43
def delete_if( &block )
  @children.delete_if(&block)
end
            
each(&block)
 
               # File rexml/parent.rb, line 39
def each(&block)
  @children.each(&block)
end
            
Also aliased as: each_child
each_child(&block)
Alias for: each
each_index( &block )
 
               # File rexml/parent.rb, line 51
def each_index( &block )
  @children.each_index(&block)
end
            
index( child )

Fetches the index of a given child @param child the child to get the index of @return the index of the child, or nil if the object is not a child of this parent.

 
               # File rexml/parent.rb, line 123
def index( child )
  count = -1
  @children.find { |i| count += 1 ; i.hash == child.hash }
  count
end
            
insert_after( child1, child2 )

Inserts an child after another child @param child1 this is either an xpath or an Element. If an Element, child2 will be inserted after child1 in the child list of the parent. If an xpath, child2 will be inserted after the first child to match the xpath. @param child2 the child to insert @return the parent (self)

 
               # File rexml/parent.rb, line 102
def insert_after( child1, child2 )
  if child1.kind_of? String
    child1 = XPath.first( self, child1 )
    child1.parent.insert_after child1, child2
  else
    ind = index(child1)+1
    child2.parent.delete(child2) if child2.parent
    @children[ind,0] = child2
    child2.parent = self
  end
  self
end
            
insert_before( child1, child2 )

Inserts an child before another child @param child1 this is either an xpath or an Element. If an Element, child2 will be inserted before child1 in the child list of the parent. If an xpath, child2 will be inserted before the first child to match the xpath. @param child2 the child to insert @return the parent (self)

 
               # File rexml/parent.rb, line 82
def insert_before( child1, child2 )
  if child1.kind_of? String
    child1 = XPath.first( self, child1 )
    child1.parent.insert_before child1, child2
  else
    ind = index(child1)
    child2.parent.delete(child2) if child2.parent
    @children[ind,0] = child2
    child2.parent = self
  end
  self
end
            
length()
Alias for: size
parent?()
 
               # File rexml/parent.rb, line 162
def parent?
  true
end
            
push( object )
Also aliased as: <<
Alias for: add
replace_child( to_replace, replacement )

Replaces one child with another, making sure the nodelist is correct @param to_replace the child to replace (must be a Child) @param replacement the child to insert into the nodelist (must be a Child)

 
               # File rexml/parent.rb, line 140
def replace_child( to_replace, replacement )
  @children.map! {|c| c.equal?( to_replace ) ? replacement : c }
  to_replace.parent = nil
  replacement.parent = self
end
            
size()

@return the number of children of this parent

 
               # File rexml/parent.rb, line 130
def size
  @children.size
end
            
Also aliased as: length
to_a()
 
               # File rexml/parent.rb, line 115
def to_a
  @children.dup
end
            
Also aliased as: children
unshift( object )
 
               # File rexml/parent.rb, line 27
def unshift( object )
  object.parent = self
  @children.unshift object
end