Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@245bc4
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@750b0b1c, com.xpn.xwiki.api.Object@2806974c, com.xpn.xwiki.api.Object@48b7131b, com.xpn.xwiki.api.Object@6b4776e8, com.xpn.xwiki.api.Object@20cfb05e, com.xpn.xwiki.api.Object@2343fc26, com.xpn.xwiki.api.Object@445f34e0, com.xpn.xwiki.api.Object@46888131, com.xpn.xwiki.api.Object@2bd9dc24]
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