From: Wesley Rishel <lists@...>
Date: 2013-01-03T14:26:56+09:00
Subject: rexml.elements.each vs 1.9.3 documentation for same

http://www.ruby-doc.org/stdlib-1.9.3/libdoc/rexml/rdoc/REXML/Elements.html#method-i-each

includes the following example:

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

However when I run it I get the results below.

Am I doing something wrong? If not, is the documentation or the code
correct? Should I be reporting this somewhere?

(My underlying goal is to find an iterator that yields one element at a
time from an XPath search, rather than doing the whole search to return
a complete array of elements.)

Running the example:

Sleek:iTunes_Library_Update Wes$ rvm 1.9.3

Sleek:iTunes_Library_Update Wes$ ruby -v
ruby 1.9.3p327 (2012-11-10) [x86_64-darwin12.2.0]

Sleek:iTunes_Library_Update Wes$ ruby rexml_question.rb
<b/>
<c/>
<d/>
"sean"
<b/>
<c/>
<d/>
/Users/Wes/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/1.9.1/rexml/parent.rb:40:in
`each': wrong number of arguments (1 for 0) (ArgumentError)
  from rexml_question.rb:10:in `<main>'

Sleek:iTunes_Library_Update Wes$ cat < rexml_question.rb
#! /usr/bin/env ruby
require "rexml/document"
include REXML

STDOUT.sync = true


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

Sleek:iTunes_Library_Update Wes$

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