Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@603af323
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@31c9f904, com.xpn.xwiki.api.Object@42fb8f25, com.xpn.xwiki.api.Object@1172e87e, com.xpn.xwiki.api.Object@efdb125, com.xpn.xwiki.api.Object@3178fbd3, com.xpn.xwiki.api.Object@7ddcf304, com.xpn.xwiki.api.Object@34d6cc2a, com.xpn.xwiki.api.Object@1f5f480, com.xpn.xwiki.api.Object@3a870081]
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