array-to-multidimensional-array.ps1

# Genereate Dummy array of numbers (does not matter that they are sequental)
$array = 1..20

# Get group size
$size = (($array.Count / 5 )) 

# Create empty array to populate with multidemensional array
$rules = @()

# For 0 to count of array. 
for ($currentIndex = 0; $currentIndex -lt $array.Count;) {
  # set next counter by adding size to current
    $nextIndex = $currentIndex + $size
    # check if we are going past the end of the array
    if ($nextIndex > $array.count) {
        # set to end of the array
        $nextIndex = $array.count
    }
    # append next array of values to rules
    $rules += @($array[$currentIndex], $array[($nextIndex)] )
    # So we dont repeat the last index add 1
    $currentIndex = $nextIndex + 1
}
# Print rules
$rules