SP.Social.SocialPost.authorIndex property (sp.userprofiles)
Gets the index of the post's author within the parent thread's actors.
Applies to: apps for SharePoint | Office 365 | SharePoint Foundation 2013 | SharePoint Server 2013
var value = SP.Social.SocialPost.get_authorIndex()
Return value
Int32
The index of the post's author within the parent thread's actors.