Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@4e9e4ef4
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@78bd57de, com.xpn.xwiki.api.Object@56d3edbf, com.xpn.xwiki.api.Object@739dc321, com.xpn.xwiki.api.Object@7a75e6d3, com.xpn.xwiki.api.Object@52856574, com.xpn.xwiki.api.Object@33c7ccff, com.xpn.xwiki.api.Object@26393e8, com.xpn.xwiki.api.Object@57836591, com.xpn.xwiki.api.Object@73813f79]
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