Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@4e1fef8e
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@2fcdb91c, com.xpn.xwiki.api.Object@6b33f5c8, com.xpn.xwiki.api.Object@204d5474, com.xpn.xwiki.api.Object@34e39c3d, com.xpn.xwiki.api.Object@4b2683eb, com.xpn.xwiki.api.Object@4d9edfd8, com.xpn.xwiki.api.Object@797a05b7, com.xpn.xwiki.api.Object@3a0d6faf, com.xpn.xwiki.api.Object@481f67ef]
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