Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@77d5801d
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@c770c35, com.xpn.xwiki.api.Object@5bc271f7, com.xpn.xwiki.api.Object@3ac83e31, com.xpn.xwiki.api.Object@306b211d, com.xpn.xwiki.api.Object@494b0fc0, com.xpn.xwiki.api.Object@5ef72bd7, com.xpn.xwiki.api.Object@355f60f6, com.xpn.xwiki.api.Object@8d6d1da, com.xpn.xwiki.api.Object@4f6b43be]
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