export function groupConsecutiveDuplicates(nums: number[]): number[][] {
  // Escribe tu solución aquí
  let someArr = []
  let dupArr = []
  for ( let i = 0; i < nums.length; i++ ) {
    if ( i === 0 ) {
      dupArr.push(nums[i])
      continue
    }
    if ( nums[i] === nums[i-1] ) {
      dupArr.push(nums[i])
    } else {
      someArr.push( dupArr )
      dupArr = []
      dupArr.push( nums[i])
    }
  }

  if ( dupArr.length !== 0 ) someArr.push( dupArr )
  
  return someArr;
}