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  1. Practice
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  4. Arrays: Left Rotation
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Arrays: Left Rotation

  • mmicael + 2 comments

    In PHP:

    $list = array_merge(array_slice($a, $k), array_slice($a, 0, $k));

echo implode(" ", $list);
    • quliyev_rustam + 0 comments

      Hi!

      You are in right way, but in wrong code.

      You need use this:

      a, a)-a, 0, $k));

    • kuttumiah + 1 comment

      Hi,

      For cases including shifts more than the array size this should work.

      $actual_shift = $d % count($a);
$list =  array_merge(array_slice($a, $actual_shift), array_slice($a, 0, $actual_shift));
      • quliyev_rustam + 1 comment

        It is not necessary. By the hypothesis of the task shifts cant bo more than array size

        • kuttumiah + 1 comment

          Yeah, Thanks for the response. I missed that hypothesis.

          In that case this shouldn't this be just fine?

          array_merge(array_slice($a, $k), array_slice($a, 0, $k));
          • quliyev_rustam + 1 comment

            In this test, for "Tester 8", you need to use third argument for array_slice. Otherwise, an error is returned.

            This is because for "Tester 8" uses a large array of transmitted values

            • kuttumiah + 1 comment

              According to the PHP documentation of array_slice third argument denotes the length of the slice.

              array array_slice ( array $array , int $offset [, int $length = NULL [, bool $preserve_keys = FALSE ]] )

              If I do not pass third argument then it will be NULL by default. As a result the slice will be created until the end of the array. I believe there is nothing to do with the volume of the array. Moreover, without passing the third argument like I denoted in my previous comment I am having all the test cases passed.

              • quliyev_rustam + 0 comments

                Moreover, without passing the third argument like I denoted in my previous comment I am having all the test cases passed.

                It's very strange. But, yesterday, when I tested, it didnt work.

                Yes, you are right! It have to be like you write!