Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@764b4702
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@334723a6, com.xpn.xwiki.api.Object@3758197, com.xpn.xwiki.api.Object@178ee247, com.xpn.xwiki.api.Object@25a9af66, com.xpn.xwiki.api.Object@273a64db, com.xpn.xwiki.api.Object@6ab379fb, com.xpn.xwiki.api.Object@2d0d8477, com.xpn.xwiki.api.Object@5273b7bc, com.xpn.xwiki.api.Object@2b23c1ee]
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