Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@647efd4f
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@2d8ad4ca, com.xpn.xwiki.api.Object@75983121, com.xpn.xwiki.api.Object@5ac1a9d7, com.xpn.xwiki.api.Object@607590cd, com.xpn.xwiki.api.Object@4675b434, com.xpn.xwiki.api.Object@5989e60f, com.xpn.xwiki.api.Object@6c5f10b5, com.xpn.xwiki.api.Object@554212a8, com.xpn.xwiki.api.Object@64d6ff52]
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