From: Robert Klemme <shortcutter@...>
Date: 2011-04-04T16:13:05+09:00
Subject: Re: Can you search in REXML by attributes?

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On Fri, Apr 1, 2011 at 9:22 PM, Kyle X. <haebooty@yahoo.com> wrote:
> Thank you Jesus, that is exactly what I was looking for and it works
> great!

Here's the same with REXML.

09:12:25 Temp$ ./rx2.rb
Approach 1
117.4
119.7
0.
Approach 2
117.4
119.7
0.
Approach 3
117.4
119.7
0.0
09:12:45 Temp$ cat -n rx2.rb
     1  #!/bin/env ruby19
     2
     3  require 'rexml/document'
     4
     5  doc = REXML::Document.new(DATA.read)
     6
     7  puts 'Approach 1'
     8
     9  REXML::XPath.each(doc, "//*[@id='i1671']//@ref") do |e|
    10    REXML::XPath.each(doc,
"//*[@id='#{e.value}']//IfcLengthMeasure/text()") do |lm|
    11      puts lm
    12    end
    13  end
    14
    15  puts 'Approach 2'
    16
    17  refs = REXML::XPath.each(doc, "//*[@id='i1671']//@ref").map
{|e| e.value}
    18  values = refs.map {|r| REXML::XPath.each(doc,
"//*[@id='#{r}']//IfcLengthMeasure/text()").to_a}.flatten
    19  puts values
    20
    21  puts 'Approach 3'
    22
    23  refs = REXML::XPath.each(doc, "//*[@id='i1671']//@ref").map
{|e| e.value}
    24  values = refs.map {|r| REXML::XPath.each(doc,
"//*[@id='#{r}']//IfcLengthMeasure/text()").map {|x|
x.value.to_f}}.flatten
    25  puts values
    26
    27  __END__
    28  <root xmlns:exp="http://foo" xmlns:xsi="http://bar">
    29  <IfcWallStandardCase id="i1677">
    30   <ObjectPlacement>
    31     <IfcLocalPlacement xsi:nil="true" ref="i1671"/>
    32   </ObjectPlacement>
    33  </IfcWallStandardCase>
    34
    35  <IfcAxis2Placement3D id="i1671">
    36   <Location>
    37     <IfcCartesianPoint xsi:nil="true" ref="i1667"/>
    38   </Location>
    39  </IfcAxis2Placement3D>
    40
    41  <IfcCartesianPoint id="i1667">
    42   <Coordinates id="i1670" exp:cType="list">
    43     <IfcLengthMeasure exp:pos="0">117.4</IfcLengthMeasure>
    44     <IfcLengthMeasure exp:pos="1">119.7</IfcLengthMeasure>
    45     <IfcLengthMeasure exp:pos="2">0.</IfcLengthMeasure>
    46   </Coordinates>
    47  </IfcCartesianPoint>
    48  </root>
09:12:46 Temp$


Have fun!

Cheers

robert


-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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