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I have no knowledge in J, but I saw that it is with this language that you can use scripts and delete social network items like by Exp on twitter:
setInterval(function(){t=$(".following").find(".follow-button");if(!t[0]){window.scrollTo(0,$(document).height());}else{ console.log(t.attr("class")); t.trigger("click");}},10)
I would like to know / help with a script to delete the Ikes and comments made on facebook by this page : fb.com/user-here/allactivity