Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@3c55346f
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@2cad136b, com.xpn.xwiki.api.Object@16d5ecb7, com.xpn.xwiki.api.Object@36a7ee17, com.xpn.xwiki.api.Object@4b004409, com.xpn.xwiki.api.Object@7e72d156, com.xpn.xwiki.api.Object@240da5f5, com.xpn.xwiki.api.Object@7c0a8a50, com.xpn.xwiki.api.Object@17fec9cf, com.xpn.xwiki.api.Object@58734157]
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