Replace Typescript Type Challenges 116 Medium

Summary

Without` looks pretty easy at first, but actually takes some thinking. We get there in the end, but it isn't one of the easier ones. 00:00 ... ReplaceKeys` is the "lift and shift" of Promise.all is a common Promise helper in JavaScript, and today we're reimplementing it in RemoveIndexSignature` should spark some healthy questions about index signatures. They're one of the features of Let's solve Chainable Options Chainable options are commonly used in JavaScript. But when we switch to Thankfully JavaScript APIs that rely on method Chaining (where you go `a.b().c().d().e().f()`) have fallen out of fashion, but even if ... MapTypes` calls for possibly one of the strangest APIs in the There are a few combinatorics and permutation ReplaceAll` is similar to yesterday's `