@cities = (qw(London Oslo Paris Amsterdam Berlin ));
@visited = (qw(Berlin Oslo));
    
say "Still need to visit:",
   grep { ! ({ $_, 0 } ~~ @visited) } @cities;

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In reply to Re^3: Difference between two arrays - is there a better way? by Anonymous Monk
in thread Difference between two arrays - is there a better way? by blindluke

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