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  1. #!/usr/bin/perl
  2. use 5.016;
  3. use warnings;
  4. no warnings qw(once);
  5. use List::Util qw(reduce first);
  6. use Data::Dumper;
  7. local $Data::Dumper::Terse = 1;
  8. local $Data::Dumper::Indent = 0;
  9.  
  10. sub f {
  11. 	@{
  12. 		+reduce{
  13. 			my $x = first{ $a->[$_] == $b } (0 .. $#{$a});
  14. 			defined $x ? [@{$a}[0 .. $x - 1, $x + 1 .. $#{$a}]] : $a;
  15. 		} [@{$_[0]}], @{$_[1]}
  16. 	} == 1
  17. }
  18.  
  19. foreach(
  20. 	[[1,2,3],[5,6,7]],
  21. 	[[1,1,1],[1,1,2]],
  22. 	[[1,1,2],[2,2,1]],
  23. 	[[9,8,9],[8,6,4]],
  24. 	[[9,7,2],[2,2,9]],
  25. ){
  26. 	say Dumper($_), " => ", (f(@{$_}) ? "true" : "false");
  27. }
  28.  
Success #stdin #stdout 0.02s 5200KB
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[[1,2,3],[5,6,7]] => false
[[1,1,1],[1,1,2]] => true
[[1,1,2],[2,2,1]] => true
[[9,8,9],[8,6,4]] => false
[[9,7,2],[2,2,9]] => true
https://ideone.com/1wRDJI
language:
Perl (perl 5.28.1)
created:
9 years ago
visibility:
public

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