This week’s challenge is the first a series of cross-backend technology challenges (JVM, .NET, and PHP). Code can be submitted in any language, and each submission will only be graded against like-languaged submissions.

First, some background: The oxford comma is a type of comma that is employed when there are more than two items in a list. It is also the source of countless pretentious debates.

This week’s challenge is to create a set of methods that do two things: remove oxford commas from a string, and add oxford commas to a string.

class Oxfordinator
{
    public function AddOxfordCommas($input);

    public function RemoveOxfordCommas($input);
}

Example input strings:

• I like flour, sugar and chocolate in my brownies.
• My peripherals include headphones, keyboards and mice.
• Our presidents, Lady and Tom O’Neill.
• They went to the Nerdery with Joe, a client and an employee.

Winners will be selected using a secret input that we will keep hidden. The individual who adds the most correct commas to the input, while having the least errors, will be selected.

1. composer install

1. Run php index.php