($=[][(__=!$+$)[_=-~-~-~$]+({}+$)[_/_]+ ($$=($_=!''+$)[_/_]+$_[+[]])])()[__[_/_]+__ [_+~$]+$_[_]+$$](_/_) on the last string trick to write 'sort' it fails if

($=[][(__=!$+$)[_=-~-~-~$]+({}+$)[_/_]+ ($$=($_=!''+$)[_/_]+$_[+[]])])()[__[_/_]+__ [_+~$]+$_[_]+$$](_/_) on the last string trick to write 'sort' it fails if there's no $=[$=[]] all the other parts just $=[] works just fine. and they are in the same scope as the 't' i can't understand