Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@4bead1d
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@53853922, com.xpn.xwiki.api.Object@4f6a1204, com.xpn.xwiki.api.Object@3cc4ed57, com.xpn.xwiki.api.Object@24ba09ec, com.xpn.xwiki.api.Object@31e177ca, com.xpn.xwiki.api.Object@497f885b, com.xpn.xwiki.api.Object@53d1340f, com.xpn.xwiki.api.Object@4bb0efc6, com.xpn.xwiki.api.Object@4d4dd6fc]
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