Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@535635a0
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@2701c2d2, com.xpn.xwiki.api.Object@649d7cff, com.xpn.xwiki.api.Object@1f797cf4, com.xpn.xwiki.api.Object@60fa8750, com.xpn.xwiki.api.Object@5fc9c6ed, com.xpn.xwiki.api.Object@382322bc, com.xpn.xwiki.api.Object@abd816f, com.xpn.xwiki.api.Object@1f7ca3eb, com.xpn.xwiki.api.Object@2feda973]
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