Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@65b24146
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@4d1b80ed, com.xpn.xwiki.api.Object@48ad6f27, com.xpn.xwiki.api.Object@725c8eb7, com.xpn.xwiki.api.Object@1a9dcb09, com.xpn.xwiki.api.Object@6d7cc985, com.xpn.xwiki.api.Object@1b9272eb, com.xpn.xwiki.api.Object@2bb6b071, com.xpn.xwiki.api.Object@66f9e122, com.xpn.xwiki.api.Object@1f2bb3ff]
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