Must [sync] methods be always "procedures"?

[Cilleruelo_Gonzalo_Juan_Carlos]

I am having trouble finding documentation about a specific term.

I created a [sync] function that returns a Boolean value, but when I try to call it, I encounter a compilation error that says: "Incompatible types: got 'TJSPromise' expected 'Boolean'" in line 135 of my Tutors.pas file.

I am not sure if I am doing something wrong.

[Tunde (Tünde Keller)]

Hi,

I assume you mean [async] instead of [sync]?
That is because when you mark a method as [async] it will be transpiled to a JavaScript async function and an async JavaScript function is automatically returning a Promise (= TJSPromise) so it cannot return a Boolean.

It can be challenging to understand this concept first, try to read this explanation from earlier:

Hashing and Cryptography in WEB Core

Hi, This comes down to how JavaScript behaves. When you mark a function as async the return value will be a promise. See the relevant MDN docs here. So even though you set the return value to a string, it is still going to return a promise. With this out of the way, consider the following: function resolveAfter2Seconds() { return new Promise(resolve => { setTimeout(() => { resolve('resolved'); }, 2000); }); } async function asyncCall() { const result = await resolveAfter2…

So what you'll probably need is to create a promise that resolves with your boolean value and await that.