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Obfuscated Quine

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"Impossible to understand Javascript" is an understatement. Here's the code

_=$_=+[],$=+!_,_$=!_+",_$$=!$+",__=({})+",_$_=($/_)+",__$=__[$+$+$+$+$];$_$=[][__$+__[$]+_$_[$]+__$+_$$[$]+_$[_]];$__=($_$+")[$$$$=(($+$)+''+(($<<$)*($+$+$)))]+($_$+'')[$$$$-$]+_$$[$]+_$$[$+$];__$$=(__$=$_$+'')[$_++]+__$[$_++]+__$[$_++]+__$[$_++]+__$[$_++]+__$[$_++]+__$[$_++]+__$[$_++];$_$()[_][$__](''+_$$[_]+__[$]+_$[$]+'($$=_,$$$=[];$$<($<<($+$+$));$$++)$$$[$$]=($<<$$)');_$_$=$_$()[_][$__](''+_$$[_]+__[$]+_$[$]+'($$ '+_$_[($<<($+$))+$]+_$_[$]+' $_$()[_])'+_$_[($<<($+$))+$]+_$$[_]+'($$[_]==_$$[$+$+$]&&$$[$]==$__[_]&&$$[$+$]==_$$[$+$+$])$$');$__$=__$$+' (){'+_$[$]+_$[$+$+$]+_$[_]+__$$[$]+_$[$]+_$_[$]+'(';_$__=$_$()[_][$__](''+_$$[_]+__[$]+_$[$]+'($$ '+_$_[($<<($+$))+$]+_$_[$]+' $_$()[_])'+_$_[($<<($+$))+$]+_$$[_]+'($$[_]==_$_$[($<<($+$))*($+$+$)]&&$$[$]==_$[$+$+$]&&$$[$+$]==_$[_]&&$$[$<<($+$)]==__[$])$$');_$$$=$_$()[_][$__](''+_$$[_]+__[$]+_$[$]+'($$ '+_$_[($<<($+$))+$]+_$_[$]+' $_$()[_])'+_$_[($<<($+$))+$]+_$$[_]+'($$[_]==__[$]&&$$[$]==_$_[$]&&$$[$+$]==__[$+$+$+$+$])$$');__$_=$_$()[_][$__](_$_$[($<<($+$+$))-$]+_$[_]+_$[$]+_$_[$+$+$]+_$_[$]+_$_$[($<<($+$))*($+$+$)]+'.'+_$$[_]+_$[$]+__[$]+_$__[($+$+$+$+$)]+_$__[$+$+$]+_$$$[$+$+$]+_$$[$]+_$[$]+_$__[$+$+$]+__[$]+_$__[($+$+$+$+$)*($+$)]+_$[$+$+$]);;$_$()[_][$__]('$_$_='+__$$+'($$,$_$_$,$_$_$_$_){'+_$[$]+_$[$+$+$]+_$[_]+__$$[$]+_$[$]+_$_[$]+' $$.'+_$[$]+_$[$+$+$]+__$_($$$[($+$+$)*($+$)]+$$$[$+$+$+$+$]+$$$[($+$+$+$)])+_$$[$+$]+_$$[$]+_$$$[$+$]+_$[$+$+$]+'($_$_$,$_$_$_$_)'+'}');_$$_=__$_($$$[$+$+$+$+$]+$+$);$_$$=__$_(($<<($+$+$+$))+(($<<($+$))+$+$+$)<<($+$))+_$$_;;___=__$_((($+$+$)+(($+$)*($+$+$+$+$)))*($+$+$));$_$()[_][$__]("($$_="+$__$+"$_$_('_=$_=+[],$=+!_,_$=!_+______,_$$=!$+______,__=({})+______,_$_=($/_)+______,__$=__[$+$+$+$+$];$_$=[][__$+__[$]+_$_[$]+__$+_$$[$]+_$[_]];$__=($_$+______)[$$$$=(($+$)+______+(($<<$)*($+$+$)))]+($_$+______)[$$$$-$]+_$$[$]+_$$[$+$];__$$=(__$=$_$+______)[$_++]+__$[$_++]+__$[$_++]+__$[$_++]+__$[$_++]+__$[$_++]+__$[$_++]+__$[$_++];$_$()[_][$__](______+_$$[_]+__[$]+_$[$]+___($$=_,$$$=[];$$<($<<($+$+$));$$++)$$$[$$]=($<<$$)___);_$_$=$_$()[_][$__](______+_$$[_]+__[$]+_$[$]+___($$ ___+_$_[($<<($+$))+$]+_$_[$]+___ $_$()[_])___+_$_[($<<($+$))+$]+_$$[_]+___($$[_]==_$$[$+$+$]&&$$[$]==$__[_]&&$$[$+$]==_$$[$+$+$])$$___);$__$=__$$+___ (){___+_$[$]+_$[$+$+$]+_$[_]+__$$[$]+_$[$]+_$_[$]+___(___;_$__=$_$()[_][$__](______+_$$[_]+__[$]+_$[$]+___($$ ___+_$_[($<<($+$))+$]+_$_[$]+___ $_$()[_])___+_$_[($<<($+$))+$]+_$$[_]+___($$[_]==_$_$[($<<($+$))*($+$+$)]&&$$[$]==_$[$+$+$]&&$$[$+$]==_$[_]&&$$[$<<($+$)]==__[$])$$___);_$$$=$_$()[_][$__](______+_$$[_]+__[$]+_$[$]+___($$ ___+_$_[($<<($+$))+$]+_$_[$]+___ $_$()[_])___+_$_[($<<($+$))+$]+_$$[_]+___($$[_]==__[$]&&$$[$]==_$_[$]&&$$[$+$]==__[$+$+$+$+$])$$___);__$_=$_$()[_][$__](_$_$[($<<($+$+$))-$]+_$[_]+_$[$]+_$_[$+$+$]+_$_[$]+_$_$[($<<($+$))*($+$+$)]+___.___+_$$[_]+_$[$]+__[$]+_$__[($+$+$+$+$)]+_$__[$+$+$]+_$$$[$+$+$]+_$$[$]+_$[$]+_$__[$+$+$]+__[$]+_$__[($+$+$+$+$)*($+$)]+_$[$+$+$]);;$_$()[_][$__](___$_$_=___+__$$+___($$,$_$_$,$_$_$_$_){___+_$[$]+_$[$+$+$]+_$[_]+__$$[$]+_$[$]+_$_[$]+___ $$.___+_$[$]+_$[$+$+$]+__$_($$$[($+$+$)*($+$)]+$$$[$+$+$+$+$]+$$$[($+$+$+$)])+_$$[$+$]+_$$[$]+_$$$[$+$]+_$[$+$+$]+___($_$_$,$_$_$_$_)___+___}___);_$$_=__$_($$$[$+$+$+$+$]+$+$);$_$$=__$_(($<<($+$+$+$))+(($<<($+$))+$+$+$)<<($+$))+_$$_;',$_$()[_][$__](__$_(''+($<<($+$+$))+($+$),''+$+_+$,''+$+_+($+$+$),''+($+$+$+$+$+$)+($+$+$)*($+$+$),''+$+($+$)+_,''+$+$+($+$))+'('+__$_((($+$+$)+(($+$)*($+$+$+$+$)))*($+$+$))+'___'+__$_((($+$+$)+(($+$)*($+$+$+$+$)))*($+$+$))+','+__$_(''+($+$+$)+(($+$+$)*($+$+$)),''+$+_+($+$+$),''+$+_+($+$+$+$+$),''+($+$+$)+(($+$+$)*($+$+$)))+')'),___)+';___=__$_((($+$+$)+(($+$)*($+$+$+$+$)))*($+$+$));$_$()[_][$__](\"($$_='+$_$_($_$_(($$_+''),_$$_,$_$$),$__$,_$$_+'+$__$+'+_$$_)+')()'+_$$_+')')})()")

The 1st comment about sums it up "Looks like Brainfuck gone mad". Eat that Obfuscated C programmers! :-)

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