As long as one of the two D's is yellow and the other is gray, I would not say it's wrong since it does give the same level of information. The official Wordle algorithm would have the yellow before the gray, though.

Looks cool. Great intro to TDD. You might want to double-check your solution using my examples (THOSE/GEESE, DREAD/ADDED). It looks to me like your code would have the same output as the first solution in my post.

Thanks so much, Edidiong Asikpo ! I really appreciate it. I totally did not expect this to gain so much attention, but I'm really glad to have been able to help! :)

Great explanation. Only 1 thing -- the 2 snippets are not equivalent. This will log the output the console only if person and socialMedia are defined: if (person?.socialMedia?.twitter) { console .log (person.socialMedia.twitter); // outputs @catalinmpit } This will log undefined to the console when person or socialMedia not defined: console .log ( person ? .socialMedia ? .twitter )