Argument of type 'X' is not assignable to parameter of type 'X'

Question

Good day. I\'m new to Type Script, using VSCode.

Getting following errors:

1. error TS2322: Type \'() => string\' is not assignable to type

Answer 1

I'm doing angular 2 and typescript and I didn't realize I had a space in my arrow notation

I had .map(key = > instead of .map(key =>

Definitely keep your eyes open for stupid syntax errors