Groovy
Retrieve the first object (index [0]) among all objects attached to this page and class XWikiComments
com.xpn.xwiki.api.Object@5b3507ce
Retrieve all objects attached to this page and of class XWikiComments
[com.xpn.xwiki.api.Object@6572cb48, com.xpn.xwiki.api.Object@53801800, com.xpn.xwiki.api.Object@7ea7d2d3, com.xpn.xwiki.api.Object@3c025b9b, com.xpn.xwiki.api.Object@3ecc3be4, com.xpn.xwiki.api.Object@527015f1, com.xpn.xwiki.api.Object@3cb0ab7f, com.xpn.xwiki.api.Object@72cb3df9, com.xpn.xwiki.api.Object@7d51e14f]
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