Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@7e3518f6
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@72149f0a, com.xpn.xwiki.api.Object@27d58409, com.xpn.xwiki.api.Object@32cf7f4d, com.xpn.xwiki.api.Object@54aeb24a, com.xpn.xwiki.api.Object@193b43b5, com.xpn.xwiki.api.Object@1da2d04, com.xpn.xwiki.api.Object@1ac1628f, com.xpn.xwiki.api.Object@e2da802, com.xpn.xwiki.api.Object@57712293]
Retrieve all objects attached to this page and of class XWikiComments and one of their properties
objsAuthors = doc.getObjects('XWiki.XWikiComments').author
objsAuthor = doc.getObjects('XWiki.XWikiComments')[2].author
println objs[0].author
println objsAuthors
println objsAuthor