Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@2fbf1061
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@2e06b84a, com.xpn.xwiki.api.Object@3b2d19e1, com.xpn.xwiki.api.Object@dfe2121, com.xpn.xwiki.api.Object@273104b4, com.xpn.xwiki.api.Object@32bd986, com.xpn.xwiki.api.Object@33d5ee0a, com.xpn.xwiki.api.Object@21feed1c, com.xpn.xwiki.api.Object@6780dab3, com.xpn.xwiki.api.Object@3c9652db]
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