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

  • shilpaJayashekar + 2 comments

    If u are using javascript, this will work var b = a.splice(0, d); a = a.concat(b);

    • belolapotkov_v + 0 comments

      Super weird but checked twice

      function rotLeft(a, d) {
    const headIndex = d % a.length
    const head = a.splice(0, headIndex)
    return a.concat(head) // fails test 9 as it creates a new array
}

      function rotLeft(a, d) {
    const headIndex = d % a.length
    const head = a.splice(0, headIndex)
    a.push(...head)
    return a // passes test 9 as it modifies initial array
}
    • code_angry + 0 comments

      why not just...

      function rotLeft(a, d) {

      return [...a.slice(d),...a.slice(0,d)]

      }

      Am i being overlooking somewhere?