Class: Nokogiri::XML::NodeSet

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/nokogiri/xml/node_set.rb,
ext/nokogiri/xml_node_set.c

Overview

A NodeSet contains a list of Nokogiri::XML::Node objects. Typically a NodeSet is return as a result of searching a Document via Nokogiri::XML::Node#css or Nokogiri::XML::Node#xpath

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(document, list = []) {|_self| ... } ⇒ NodeSet

Create a NodeSet with document defaulting to list

Yields:

  • (_self)

Yield Parameters:



14
15
16
17
18
19
# File 'lib/nokogiri/xml/node_set.rb', line 14

def initialize document, list = []
  @document = document
  document.decorate(self)
  list.each { |x| self << x }
  yield self if block_given?
end

Instance Attribute Details

#documentObject

The Document this NodeSet is associated with



11
12
13
# File 'lib/nokogiri/xml/node_set.rb', line 11

def document
  @document
end

Instance Method Details

#&(node_set) ⇒ Object

Set Intersection — Returns a new NodeSet containing nodes common to the two NodeSets.



163
164
165
166
167
168
169
170
171
172
173
174
175
176
# File 'ext/nokogiri/xml_node_set.c', line 163

static VALUE intersection(VALUE self, VALUE rb_other)
{
  nokogiriNodeSetTuple *tuple, *other;
  xmlNodeSetPtr intersection;

  if(! rb_obj_is_kind_of_(rb_other, cNokogiriXmlNodeSet))
    rb_raise(rb_eArgError, "node_set must be a Nokogiri::XML::NodeSet");

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  Data_Get_Struct(rb_other, nokogiriNodeSetTuple, other);

  intersection = xmlXPathIntersection(tuple->node_set, other->node_set);
  return Nokogiri_wrap_xml_node_set(intersection, rb_iv_get(self, "@document"));
}

#-(node_set) ⇒ Object

Difference - returns a new NodeSet that is a copy of this NodeSet, removing

each item that also appears in +node_set+


231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
# File 'ext/nokogiri/xml_node_set.c', line 231

static VALUE minus(VALUE self, VALUE rb_other)
{
  nokogiriNodeSetTuple *tuple, *other;
  xmlNodeSetPtr new;
  int j ;

  if(! rb_obj_is_kind_of_(rb_other, cNokogiriXmlNodeSet))
    rb_raise(rb_eArgError, "node_set must be a Nokogiri::XML::NodeSet");

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  Data_Get_Struct(rb_other, nokogiriNodeSetTuple, other);

  new = xmlXPathNodeSetMerge(NULL, tuple->node_set);
  for (j = 0 ; j < other->node_set->nodeNr ; ++j) {
    xmlXPathNodeSetDel(new, other->node_set->nodeTab[j]);
  }

  return Nokogiri_wrap_xml_node_set(new, rb_iv_get(self, "@document"));
}

#==(other) ⇒ Object

Equality – Two NodeSets are equal if the contain the same number of elements and if each element is equal to the corresponding element in the other NodeSet



321
322
323
324
325
326
327
328
# File 'lib/nokogiri/xml/node_set.rb', line 321

def == other
  return false unless other.is_a?(Nokogiri::XML::NodeSet)
  return false unless length == other.length
  each_with_index do |node, i|
    return false unless node == other[i]
  end
  true
end

#>(selector) ⇒ Object

Search this NodeSet’s nodes’ immediate children using CSS selector selector



143
144
145
146
# File 'lib/nokogiri/xml/node_set.rb', line 143

def > selector
  ns = document.root.namespaces
  xpath CSS.xpath_for(selector, :prefix => "./", :ns => ns).first
end

#[](*args) ⇒ Object

start, length

-> NodeSet or nil

range

-> NodeSet or nil

slice(index) -> Node or nil
slice(start, length) -> NodeSet or nil
slice(range) -> NodeSet or nil

Element reference - returns the node at index, or returns a NodeSet containing nodes starting at start and continuing for length elements, or returns a NodeSet containing nodes specified by range. Negative indices count backward from the end of the node_set (-1 is the last node). Returns nil if the index (or start) are out of range.



310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
# File 'ext/nokogiri/xml_node_set.c', line 310

static VALUE slice(int argc, VALUE *argv, VALUE self)
{
  VALUE arg ;
  long beg, len ;
  xmlNodeSetPtr node_set;
  nokogiriNodeSetTuple *tuple;
  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  node_set = tuple->node_set;

  if (argc == 2) {
    beg = NUM2LONG(argv[0]);
    len = NUM2LONG(argv[1]);
    if (beg < 0) {
      beg += node_set->nodeNr ;
    }
    return subseq(self, beg, len);
  }

  if (argc != 1) {
    rb_scan_args(argc, argv, "11", NULL, NULL);
  }
  arg = argv[0];

  if (FIXNUM_P(arg)) {
    return index_at(self, FIX2LONG(arg));
  }
  
  /* if arg is Range */
  switch (rb_range_beg_len(arg, &beg, &len, (long)node_set->nodeNr, 0)) {
  case Qfalse:
    break;
  case Qnil:
    return Qnil;
  default:
    return subseq(self, beg, len);
  }

  return index_at(self, NUM2LONG(arg));
}

#add_class(name) ⇒ Object

Append the class attribute name to all Node objects in the NodeSet.



183
184
185
186
187
188
189
# File 'lib/nokogiri/xml/node_set.rb', line 183

def add_class name
  each do |el|
    classes = el['class'].to_s.split(/\s+/)
    el['class'] = classes.push(name).uniq.join " "
  end
  self
end

#after(datum) ⇒ Object

Insert datum after the last Node in this NodeSet



59
60
61
# File 'lib/nokogiri/xml/node_set.rb', line 59

def after datum
  last.after datum
end

#at(path, ns = document.root ? document.root.namespaces : {}) ⇒ Object Also known as: %

If path is a string, search this document for path returning the first Node. Otherwise, index in to the array with path.



151
152
153
154
# File 'lib/nokogiri/xml/node_set.rb', line 151

def at path, ns = document.root ? document.root.namespaces : {}
  return self[path] if path.is_a?(Numeric)
  search(path, ns).first
end

#at_css(*rules) ⇒ Object

Search this NodeSet for the first occurrence of CSS rules. Equivalent to css(rules).first See NodeSet#css for more information.



171
172
173
# File 'lib/nokogiri/xml/node_set.rb', line 171

def at_css *rules
  css(*rules).first
end

#at_xpath(*paths) ⇒ Object

Search this NodeSet for the first occurrence of XPath paths. Equivalent to xpath(paths).first See NodeSet#xpath for more information.



162
163
164
# File 'lib/nokogiri/xml/node_set.rb', line 162

def at_xpath *paths
  xpath(*paths).first
end

#attr(key, value = nil, &blk) ⇒ Object Also known as: set, attribute

Set the attribute key to value or the return value of blk on all Node objects in the NodeSet.



214
215
216
217
218
219
220
221
222
223
224
# File 'lib/nokogiri/xml/node_set.rb', line 214

def attr key, value = nil, &blk
  unless Hash === key || key && (value || blk)
    return first.attribute(key)
  end

  hash = key.is_a?(Hash) ? key : { key => value }

  hash.each { |k,v| each { |el| el[k] = v || blk[el] } }

  self
end

#before(datum) ⇒ Object

Insert datum before the first Node in this NodeSet



53
54
55
# File 'lib/nokogiri/xml/node_set.rb', line 53

def before datum
  first.before datum
end

#childrenObject

Returns a new NodeSet containing all the children of all the nodes in the NodeSet



333
334
335
# File 'lib/nokogiri/xml/node_set.rb', line 333

def children
  inject(NodeSet.new(document)) { |set, node| set += node.children }
end

#css(*paths) ⇒ Object

Search this NodeSet for css paths

For more information see Nokogiri::XML::Node#css



96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
# File 'lib/nokogiri/xml/node_set.rb', line 96

def css *paths
  handler = ![
    Hash, String, Symbol
  ].include?(paths.last.class) ? paths.pop : nil

  ns = paths.last.is_a?(Hash) ? paths.pop : nil

  sub_set = NodeSet.new(document)

  each do |node|
    doc = node.document
    search_ns = ns || (doc.root ? doc.root.namespaces : {})

    xpaths = paths.map { |rule|
      [
        CSS.xpath_for(rule.to_s, :prefix => ".//", :ns => search_ns),
        CSS.xpath_for(rule.to_s, :prefix => "self::", :ns => search_ns)
      ].join(' | ')
    }

    sub_set += node.xpath(*(xpaths + [search_ns, handler].compact))
  end
  document.decorate(sub_set)
  sub_set
end

#delete(node) ⇒ Object

Delete node from the Nodeset, if it is a member. Returns the deleted node if found, otherwise returns nil.



128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
# File 'ext/nokogiri/xml_node_set.c', line 128

static VALUE
delete(VALUE self, VALUE rb_node)
{
    nokogiriNodeSetTuple *tuple;
    xmlNodePtr node;
    xmlNodeSetPtr cur;
    int i;

    if (!(RTEST(rb_obj_is_kind_of(rb_node, cNokogiriXmlNode)) || RTEST(rb_obj_is_kind_of(rb_node, cNokogiriXmlNamespace))))
	rb_raise(rb_eArgError, "node must be a Nokogiri::XML::Node or Nokogiri::XML::Namespace");

    Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
    Data_Get_Struct(rb_node, xmlNode, node);
    cur = tuple->node_set;

    if (xmlXPathNodeSetContains(cur, node)) {
	for (i = 0; i < cur->nodeNr; i++)
	    if (cur->nodeTab[i] == node) break;

	cur->nodeNr--;
	for (;i < cur->nodeNr;i++)
	    cur->nodeTab[i] = cur->nodeTab[i + 1];
	cur->nodeTab[cur->nodeNr] = NULL;
	return rb_node;
    }
    return Qnil ;
}

#dupObject

Duplicate this node set



75
76
77
78
79
80
81
82
83
84
85
# File 'ext/nokogiri/xml_node_set.c', line 75

static VALUE duplicate(VALUE self)
{
  nokogiriNodeSetTuple *tuple;
  xmlNodeSetPtr dupl;

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);

  dupl = xmlXPathNodeSetMerge(NULL, tuple->node_set);

  return Nokogiri_wrap_xml_node_set(dupl, rb_iv_get(self, "@document"));
}

#each(&block) ⇒ Object

Iterate over each node, yielding to block



237
238
239
240
241
# File 'lib/nokogiri/xml/node_set.rb', line 237

def each(&block)
  0.upto(length - 1) do |x|
    yield self[x]
  end
end

#empty?Boolean

Is this NodeSet empty?

Returns:

  • (Boolean)


40
41
42
# File 'lib/nokogiri/xml/node_set.rb', line 40

def empty?
  length == 0
end

#filter(expr) ⇒ Object

Filter this list for nodes that match expr



177
178
179
# File 'lib/nokogiri/xml/node_set.rb', line 177

def filter expr
  find_all { |node| node.matches?(expr) }
end

#first(n = nil) ⇒ Object

Get the first element of the NodeSet.



23
24
25
26
27
28
29
30
# File 'lib/nokogiri/xml/node_set.rb', line 23

def first n = nil
  return self[0] unless n
  list = []
  0.upto(n - 1) do |i|
    list << self[i]
  end
  list
end

#include?(node) ⇒ Boolean

Returns true if any member of node set equals node.

Returns:

  • (Boolean)


185
186
187
188
189
190
191
192
193
194
195
196
197
# File 'ext/nokogiri/xml_node_set.c', line 185

static VALUE include_eh(VALUE self, VALUE rb_node)
{
  nokogiriNodeSetTuple *tuple;
  xmlNodePtr node;

  if(!( rb_obj_is_kind_of_(rb_node, cNokogiriXmlNode) || rb_obj_is_kind_of_(rb_node, cNokogiriXmlNamespace)))
    rb_raise(rb_eArgError, "node must be a Nokogiri::XML::Node or Nokogiri::XML::Namespace");

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  Data_Get_Struct(rb_node, xmlNode, node);

  return (xmlXPathNodeSetContains(tuple->node_set, node) ? Qtrue : Qfalse);
}

#index(node) ⇒ Object

Returns the index of the first node in self that is == to node. Returns nil if no match is found.



46
47
48
49
# File 'lib/nokogiri/xml/node_set.rb', line 46

def index(node)
  each_with_index { |member, j| return j if member == node }
  nil
end

#inner_html(*args) ⇒ Object

Get the inner html of all contained Node objects



252
253
254
# File 'lib/nokogiri/xml/node_set.rb', line 252

def inner_html *args
  collect{|j| j.inner_html(*args) }.join('')
end

#inner_textObject Also known as: text

Get the inner text of all contained Node objects



245
246
247
# File 'lib/nokogiri/xml/node_set.rb', line 245

def inner_text
  collect{|j| j.inner_text}.join('')
end

#inspectObject

Return a nicely formated string representation



350
351
352
# File 'lib/nokogiri/xml/node_set.rb', line 350

def inspect
  "[#{map { |c| c.inspect }.join ', '}]"
end

#lastObject

Get the last element of the NodeSet.



34
35
36
# File 'lib/nokogiri/xml/node_set.rb', line 34

def last
  self[length - 1]
end

#lengthObject Also known as: size

Get the length of the node set



93
94
95
96
97
98
99
# File 'ext/nokogiri/xml_node_set.c', line 93

static VALUE length(VALUE self)
{
  nokogiriNodeSetTuple *tuple;
  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);

  return tuple->node_set ? INT2NUM(tuple->node_set->nodeNr) : INT2NUM(0);
}

#popObject

Removes the last element from set and returns it, or nil if the set is empty



304
305
306
307
# File 'lib/nokogiri/xml/node_set.rb', line 304

def pop
  return nil if length == 0
  delete last
end

#push(node) ⇒ Object Also known as: <<

Append node to the NodeSet.



107
108
109
110
111
112
113
114
115
116
117
118
119
# File 'ext/nokogiri/xml_node_set.c', line 107

static VALUE push(VALUE self, VALUE rb_node)
{
  nokogiriNodeSetTuple *tuple;
  xmlNodePtr node;

  if(!( rb_obj_is_kind_of_(rb_node, cNokogiriXmlNode) || rb_obj_is_kind_of_(rb_node, cNokogiriXmlNamespace)))
    rb_raise(rb_eArgError, "node must be a Nokogiri::XML::Node or Nokogiri::XML::Namespace");

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  Data_Get_Struct(rb_node, xmlNode, node);
  xmlXPathNodeSetAdd(tuple->node_set, node);
  return self;
}

#remove_attr(name) ⇒ Object

Remove the attributed named name from all Node objects in the NodeSet



230
231
232
233
# File 'lib/nokogiri/xml/node_set.rb', line 230

def remove_attr name
  each { |el| el.delete name }
  self
end

#remove_class(name = nil) ⇒ Object

Remove the class attribute name from all Node objects in the NodeSet. If name is nil, remove the class attribute from all Nodes in the NodeSet.



195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
# File 'lib/nokogiri/xml/node_set.rb', line 195

def remove_class name = nil
  each do |el|
    if name
      classes = el['class'].to_s.split(/\s+/)
      if classes.empty?
        el.delete 'class'
      else
        el['class'] = (classes - [name]).uniq.join " "
      end
    else
      el.delete "class"
    end
  end
  self
end

#reverseObject

Returns a new NodeSet containing all the nodes in the NodeSet in reverse order



340
341
342
343
344
345
346
# File 'lib/nokogiri/xml/node_set.rb', line 340

def reverse
  node_set = NodeSet.new(document)
  (length - 1).downto(0) do |x|
    node_set.push self[x]
  end
  node_set
end

#search(*paths) ⇒ Object Also known as: /

Search this document for paths

For more information see Nokogiri::XML::Node#css and Nokogiri::XML::Node#xpath



71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
# File 'lib/nokogiri/xml/node_set.rb', line 71

def search *paths
  handler = ![
    Hash, String, Symbol
  ].include?(paths.last.class) ? paths.pop : nil

  ns = paths.last.is_a?(Hash) ? paths.pop : nil

  sub_set = NodeSet.new(document)

  paths.each do |path|
    sub_set += send(
      path =~ /^(\.\/|\/|\.\.|\.$)/ ? :xpath : :css,
      *(paths + [ns, handler]).compact
    )
  end

  document.decorate(sub_set)
  sub_set
end

#shiftObject

Returns the first element of the NodeSet and removes it. Returns nil if the set is empty.



312
313
314
315
# File 'lib/nokogiri/xml/node_set.rb', line 312

def shift
  return nil if length == 0
  delete first
end

#slice(*args) ⇒ Object

start, length

-> NodeSet or nil

range

-> NodeSet or nil

slice(index) -> Node or nil
slice(start, length) -> NodeSet or nil
slice(range) -> NodeSet or nil

Element reference - returns the node at index, or returns a NodeSet containing nodes starting at start and continuing for length elements, or returns a NodeSet containing nodes specified by range. Negative indices count backward from the end of the node_set (-1 is the last node). Returns nil if the index (or start) are out of range.



310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
# File 'ext/nokogiri/xml_node_set.c', line 310

static VALUE slice(int argc, VALUE *argv, VALUE self)
{
  VALUE arg ;
  long beg, len ;
  xmlNodeSetPtr node_set;
  nokogiriNodeSetTuple *tuple;
  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  node_set = tuple->node_set;

  if (argc == 2) {
    beg = NUM2LONG(argv[0]);
    len = NUM2LONG(argv[1]);
    if (beg < 0) {
      beg += node_set->nodeNr ;
    }
    return subseq(self, beg, len);
  }

  if (argc != 1) {
    rb_scan_args(argc, argv, "11", NULL, NULL);
  }
  arg = argv[0];

  if (FIXNUM_P(arg)) {
    return index_at(self, FIX2LONG(arg));
  }
  
  /* if arg is Range */
  switch (rb_range_beg_len(arg, &beg, &len, (long)node_set->nodeNr, 0)) {
  case Qfalse:
    break;
  case Qnil:
    return Qnil;
  default:
    return subseq(self, beg, len);
  }

  return index_at(self, NUM2LONG(arg));
}

#to_aObject Also known as: to_ary

Return this list as an Array



357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
# File 'ext/nokogiri/xml_node_set.c', line 357

static VALUE to_array(VALUE self, VALUE rb_node)
{
  xmlNodeSetPtr set;
  VALUE *elts;
  VALUE list;
  int i;
  nokogiriNodeSetTuple *tuple;

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  set = tuple->node_set;

  elts = calloc((size_t)set->nodeNr, sizeof(VALUE *));
  for(i = 0; i < set->nodeNr; i++) {
    if (XML_NAMESPACE_DECL == set->nodeTab[i]->type)
      elts[i] = Nokogiri_wrap_xml_namespace2(rb_iv_get(self, "@document"), (xmlNsPtr)(set->nodeTab[i]));
    else
      elts[i] = Nokogiri_wrap_xml_node(Qnil, set->nodeTab[i]);
  }

  list = rb_ary_new4((long)set->nodeNr, elts);

  /*free(elts); */

  return list;
}

#to_html(*args) ⇒ Object

Convert this NodeSet to HTML



275
276
277
278
279
280
281
282
283
284
# File 'lib/nokogiri/xml/node_set.rb', line 275

def to_html *args
  if Nokogiri.jruby?
    options = args.first.is_a?(Hash) ? args.shift : {}
    if !options[:save_with]
      options[:save_with] = Node::SaveOptions::NO_DECLARATION | Node::SaveOptions::NO_EMPTY_TAGS | Node::SaveOptions::AS_HTML
    end
    args.insert(0, options)
  end
  map { |x| x.to_html(*args) }.join
end

#to_sObject

Convert this NodeSet to a string.



269
270
271
# File 'lib/nokogiri/xml/node_set.rb', line 269

def to_s
  map { |x| x.to_s }.join
end

#to_xhtml(*args) ⇒ Object

Convert this NodeSet to XHTML



288
289
290
# File 'lib/nokogiri/xml/node_set.rb', line 288

def to_xhtml *args
  map { |x| x.to_xhtml(*args) }.join
end

#to_xml(*args) ⇒ Object

Convert this NodeSet to XML



294
295
296
# File 'lib/nokogiri/xml/node_set.rb', line 294

def to_xml *args
  map { |x| x.to_xml(*args) }.join
end

Unlink this NodeSet and all Node objects it contains from their current context.



389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
# File 'ext/nokogiri/xml_node_set.c', line 389

static VALUE unlink_nodeset(VALUE self)
{
  xmlNodeSetPtr node_set;
  int j, nodeNr ;
  nokogiriNodeSetTuple *tuple;

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  node_set = tuple->node_set;
  nodeNr = node_set->nodeNr ;
  for (j = 0 ; j < nodeNr ; j++) {
    if (XML_NAMESPACE_DECL != node_set->nodeTab[j]->type) {
      VALUE node ;
      xmlNodePtr node_ptr;
      node = Nokogiri_wrap_xml_node(Qnil, node_set->nodeTab[j]);
      rb_funcall(node, rb_intern("unlink"), 0); /* modifies the C struct out from under the object */
      Data_Get_Struct(node, xmlNode, node_ptr);
      node_set->nodeTab[j] = node_ptr ;
    }
  }
  return self ;
}

#wrap(html, &blk) ⇒ Object

Wrap this NodeSet with html or the results of the builder in blk



258
259
260
261
262
263
264
265
# File 'lib/nokogiri/xml/node_set.rb', line 258

def wrap(html, &blk)
  each do |j|
    new_parent = document.parse(html).first
    j.add_next_sibling(new_parent)
    new_parent.add_child(j)
  end
  self
end

#xpath(*paths) ⇒ Object

Search this NodeSet for XPath paths

For more information see Nokogiri::XML::Node#xpath



126
127
128
129
130
131
132
133
134
135
136
137
138
139
# File 'lib/nokogiri/xml/node_set.rb', line 126

def xpath *paths
  handler = ![
    Hash, String, Symbol
  ].include?(paths.last.class) ? paths.pop : nil

  ns = paths.last.is_a?(Hash) ? paths.pop : nil

  sub_set = NodeSet.new(document)
  each do |node|
    sub_set += node.xpath(*(paths + [ns, handler].compact))
  end
  document.decorate(sub_set)
  sub_set
end

#|(node_set) ⇒ Object Also known as: +

Returns a new set built by merging the set and the elements of the given set.



207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
# File 'ext/nokogiri/xml_node_set.c', line 207

static VALUE set_union(VALUE self, VALUE rb_other)
{
  nokogiriNodeSetTuple *tuple, *other;
  xmlNodeSetPtr new;

  if(! rb_obj_is_kind_of_(rb_other, cNokogiriXmlNodeSet))
    rb_raise(rb_eArgError, "node_set must be a Nokogiri::XML::NodeSet");

  Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
  Data_Get_Struct(rb_other, nokogiriNodeSetTuple, other);

  new = xmlXPathNodeSetMerge(NULL, tuple->node_set);
  new = xmlXPathNodeSetMerge(new, other->node_set);

  return Nokogiri_wrap_xml_node_set(new, rb_iv_get(self, "@document"));
}