Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@176c68e4
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@643435c9, com.xpn.xwiki.api.Object@1fb75284, com.xpn.xwiki.api.Object@3c8a6860, com.xpn.xwiki.api.Object@22ca95ad, com.xpn.xwiki.api.Object@2228a2b3, com.xpn.xwiki.api.Object@19d1a74a, com.xpn.xwiki.api.Object@133df884, com.xpn.xwiki.api.Object@4986abfa, com.xpn.xwiki.api.Object@2884cfcc]
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