Throwing in case of failed cast

[y-lohse]

Referring to "Raising exception vs. having undefined behavior" from here.

In this codebase, we use parseInt(value) in places where the C# version does (int) value. If the cast is impossible, this produces a runtime error in the C# version whereas we'll keep going with whatever parseInt has returned.

Typescript has no special casting powers (as doesn't do that), so we're left with regular javascript. I guess the best thing to do would be to introduce another helper function that will parseInt the value, but throw if the result is NaN?

[y-lohse]

We can probably use or update asNumberOrThrows for the checking part.