Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@1f214e06
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@59bd3e51, com.xpn.xwiki.api.Object@174665de, com.xpn.xwiki.api.Object@ec9ddc2, com.xpn.xwiki.api.Object@66fdf323, com.xpn.xwiki.api.Object@2a65b3a8, com.xpn.xwiki.api.Object@7af5f056, com.xpn.xwiki.api.Object@2875dd2b, com.xpn.xwiki.api.Object@520b46cd, com.xpn.xwiki.api.Object@625566cf]
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