In my first job out of college, I was assigned the task of rewriting the autocomplete feature of a search page. The original code, entombed in a decrepit codebase, was a nauseating monstrosity that others wanted no truck with. The plan was to rewrite it in TypeScript—a dialect of JavaScript—drawing on a library that incorporated some handy features from a language called Haskell.Haskell. It sounded like a good name for a weapon—a well-sharpened blade, like scimitar or katana. The strong German-s...