Building a tiny little broken calculator with parser combinators

from blog blog.jfo.click, | ↗ original
Perhaps I have a string lying around somewhere... const testString = "Abcd123"; What a lovely little string. I will start with a function that takes a string as input and tells you if the input passes some test you've set out for it. This is not yet a parser, not really. Usually, a parser does quite a lot mor...