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Posted to notifications@groovy.apache.org by manouti <gi...@git.apache.org> on 2017/03/23 21:52:35 UTC

[GitHub] groovy pull request #517: Differentiate between XML breadthFirst() traversal...

GitHub user manouti opened a pull request:

    https://github.com/apache/groovy/pull/517

    Differentiate between XML breadthFirst() traversal and * navigation

    The analogy between '*' and breadthFirst() traversal seems wrong. The former only traverses one level, while the latter searches through the next levels as well. See http://stackoverflow.com/questions/42985716/groovy-xml-tree-traversal-breadthfirst-method-using-as-syntactic-sugar:
    
        def books = '''\
        <response>
           <books>
              <book available="20" id="1">
                 <title>foo</title>
                 <author id="1">foo author</author>
              </book>
              <book available="14" id="2">
                 <title>bar</title>
                 <author id="2">bar author</author>
              </book>
           </books>
        </response>'''
    
        def response = new XmlSlurper().parseText(books)
        def bk = response.'*'.find { node ->
           node.name() == 'book' && node['@id'].toInteger() == 2
        }
        assert bk.empty
    
    > whereas using breadthFirst() explicitly does what I expect both to do which is to do breadth-first traversal:
    
        def books = '''\
        <response>
           <books>
              <book available="20" id="1">
                 <title>foo</title>
                 <author id="1">foo author</author>
              </book>
              <book available="14" id="2">
                 <title>bar</title>
                 <author id="2">bar author</author>
              </book>
           </books>
        </response>'''
    
        def response = new XmlSlurper().parseText(books)
        def bk = response.breadthFirst().find { node ->
           node.name() == 'book' && node['@id'].toInteger() == 2
        }
        assert bk.title == 'bar' // bk is no longer an empty list of children


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/manouti/groovy patch-1

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/groovy/pull/517.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #517
    
----
commit e44d36531c46db13bdfe398de7ec852be4b02aa0
Author: manouti <ma...@users.noreply.github.com>
Date:   2017-03-23T21:45:20Z

    Differentiate between XML breadthFirst() traversal and * navigation
    
    The analogy between '*' and breadthFirst() traversal seems wrong. The former only traverses one level, while the latter searches through the next levels as well. See http://stackoverflow.com/questions/42985716/groovy-xml-tree-traversal-breadthfirst-method-using-as-syntactic-sugar.

----


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[GitHub] groovy pull request #517: Differentiate between XML breadthFirst() traversal...

Posted by asfgit <gi...@git.apache.org>.
Github user asfgit closed the pull request at:

    https://github.com/apache/groovy/pull/517


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