On: Pattern Matching with TypeScript

[koolba]

Shouldn't the uppercase of a number be a string?

    const makeUpperCase = t.pattern(
      (input: string) => input.toUpperCase(),
      (input: number) => '' + input
    );

Otherwise you get odd behaviours like:

    makeUpperCase('1') + makeUpperCase('1') = '11' (probably what you want)
    makeUpperCase(1) + makeUpperCase(1) = 2 (probably not what you want)

[rezistik → koolba]

...wait. Why would the uppercase of '1' be '11'? It would just be '1'.

[livingparadox → rezistik]

I had to reread it a few times to parse it. Its result of "adding" the uppercase of 1 that should be 11, not the uppercase itself.

In other words, the result of "makeUppercase" should be a string, not a number.

[rezistik → livingparadox]

I see it now.

[phpnode → koolba]

Yeah probably, but it's just an example