Vertically Aligning Roman Numerals in Code

I have a PHP function which uses Roman Numerals. It looks like this:

⧉ PHP$romanNumerals = [
    "Ⅿ"  => 1000,
    "ⅭⅯ" => 900,
    "Ⅾ"  => 500,
    "ⅭⅮ" => 400,
    "Ⅽ"  => 100,
    "ⅩC" =>  90,
    "Ⅼ"  =>  50,
    "ⅩⅬ" => 40,
    "Ⅹ"  => 10,
    "Ⅸ"  => 9,
    "Ⅷ" => 8,
    "Ⅶ"  => 7,
    "Ⅵ"  => 6,
    "Ⅴ"   => 5,
    "Ⅳ"  => 4,
    "Ⅲ"  => 3,
    "Ⅱ"  => 2,
    "Ⅰ"   => 1
];

The problem is, the operators don't line up and the whole thing looks messy. Why? Because the Unicode Roman Numerals are not monospaced! ⅭⅯ is a different width to ⅩC and Ⅷ is only a single character! Copy the above to a text editor and see if you can get neat columns. I bet you can't!

I'm obsessed with vertically aligning my code. So how to solve this ugly problem?

The answer was simple. Assign keys to the values and then flip the array!

⧉ PHP$romanNumerals = array_flip([
    1000 => "Ⅿ",
     900 => "ⅭⅯ",
     500 => "Ⅾ",
     400 => "ⅭⅮ",
     100 => "Ⅽ",
      90 => "ⅩC",
      50 => "Ⅼ",
      40 => "ⅩⅬ",
      10 => "Ⅹ",
       9 => "Ⅸ",
       8 => "Ⅷ",
       7 => "Ⅶ",
       6 => "Ⅵ",
       5 => "Ⅴ",
       4 => "Ⅳ",
       3 => "Ⅲ",
       2 => "Ⅱ",
       1 => "Ⅰ"
]);

There! Doesn't that look much neater!

As was written long ago:

A computer language is not just a way of getting a computer to perform operations but rather … it is a novel formal medium for expressing ideas about methodology. Thus, programs must be written for people to read, and only incidentally for machines to execute.