One of the array functions that I rarely see in use is '.from'. It creates an array from the array-like or iterable objects. Though it's often forgotten, it has a callback, just like 'map', and can help with transforming.
I came across this by accident, and I am not sure how I feel about this. You can merge interfaces in
TypeScript Tip You can ease into TS by setting 'strict' to false. If you do this, however, you should set 'strictNullChecks' to true. This will save you from the infamous "Cannot read property of undefined" error! When strict is false, strictNullChecks defaults to false pic.twitter.com/RrcAU8PfLs