[clarkdave]

From the interview (it's way down the page):

> The most challenging thing is the absence of the specification. I had to infer everything just from test cases.

> The second thing is the velocity of tsc. It's way too fast, and I was unsure if I could follow it up. So I decided to use semi-automated translation and selected Golang.

> But it was too boring, and more importantly, my programming ability has improved enough to follow tsc only by myself.