Tweaks to Bonus Challenge

# will reuse this
$maxLength = ($z | % Length | measure -max).maximum

# array count = length of properties (first line of $z), all 0's
# 0 will represent a whitespace column
# 1 will represent a non-whitespace column
$splitGuesses = ,0*$maxLength

# iterate over columns and rows, if any char is not empty, change the guesses array value to 1 and break
# the column at that index of the $splitGuesses array represents if the column is whitespace or not
for ($column=0; $column -lt $maxLength; $column++) {
    for ($row=0; $row -lt $z.Count; $row++) {
        if($z[$row][$column] -ne " ") {
            $splitGuesses[$column] += 1
            break
        }
    }
}

# now we need the indices of the split guesses, but need to start w/ 0
$splitGuessesIndices= @(
  0
  # iterate over the guesses and add index
  for($i=0; $i -lt $splitGuesses.count; $i++){
      if(-not $splitGuesses[$i]) {
          $i
      }
  }
)

# this also needs the max length $z
$splitGuessesIndices += $maxLength

# next we need to check each guess (empty column) to confirm the next guess isn't also empty
# if the next guess was also empty, then the end of the interval is not the beginning of a new property
# the beginning of a new property must start with a character
$splitIndices =
for($i=0; $i -lt $splitGuessesIndices.count - 1; $i++) {

    $index1 = $splitGuessesIndices[$i]
    $index2 = $splitGuessesIndices[$i+1]

    # get substring the text of the first line/row
    $text = -join $z[0][$index1..$index2]

    # if the first line/row is not empty, then the first index is the beginning of a new property column
    if ($text -notmatch '^\s+$') {
        $index1
    }
}

# we need the max length of $z to be at the end of the array of indices at which to split
$splitIndices += $maxLength

# get property names from first line/row
$properties = $z[0].Split() | ? {$_}

# split up the values now
for($row=1; $row -lt $z.count; $row++) {
    $tempHash = @{}

    # indexes of indexes!
    for($i=0; $i -lt $splitIndices.Count - 1; $i++) {
        # index into $properties for the key name for hash
        # concat the text from the row and trim for value for hash
        $tempHash.Add($($properties[$i]), (-join $z[$row][$splitIndices[$i]..($splitIndices[$i+1])]).Trim())
    }

    # init output array and/or add the hashtable cast as pscustomobject
    [pscustomobject]$tempHash
}