Writed this code but looks just like java with different sin

Question

Writed this code but looks just like java with different sintax what would be a kotliner way to write such function ``` fun StringValues getUuidParam name String UUID val id = getAll name firstOrNull if id = null try return UUID fromString id catch e InvalidArgumentException httpException developerMessage = Parameter $name does not contain a valid UUID else httpException developerMessage = Required param $name is not present ```

Alex Crafford · Answer

```getAll name firstOrNull let try return UUID fromString it catch e catch e InvalidArgumentException httpException developerMessage = Parameter $name does not contain a valid UUID httpException developerMessage = Required param $name is not present ```

Alex Crafford · Answer

Using let allows you to kotlin ize the null check and get rid of that val

Alowaniak · Answer

personally I would find `val id = orNull throw httpExc name not present` Easier to read

Shawn · Answer

folks overuse `let ` without realizing their callsite just looks like if else but weirder to read

Casey Brooks · Answer

I agree with < Shawn> I tend to find it cognitively difficult to understand what s happening with most ` let` blocks Sometimes they can be nice but if you re doing it to avoid an in else it s easier to understand if you just go ahead and use the if else `let` can also cause subtle but hard to detect bugs due to them returning the lambda result and not the receiver such as this one so you have to be careful when using them

Alex Crafford · Answer

I mainly use them to check null cases For returns on the lambda don t you have to annotate it like for example ```return lambda```

Alowaniak · Answer

Yea imo you might want to use them if you don t have the else branch and need to do some stuff with `it` but otherwise there s probably a clearer construct you can use

Alowaniak · Answer

< Alex Crafford> the last expression in a lambda is the return value for that lambda If you want to return early you ll need to use label at least iirc

Alex Crafford · Answer

Right so in comparison ```return thing returns at the method level return thing returns at the lambda level```

Alowaniak · Answer

Yes and ` a let null == null` Oh sorry just noticed that in op s case it wouldn t be a problem

Vinicius Araujo · Answer

Thanks everyone based on comments I ended up like this ``` fun StringValues getUuidParam name String UUID = try val id = getAll name firstOrNull httpException not present UUID fromString id catch e IllegalArgumentException httpException developerMessage = not valid ```

Alex Crafford · Answer

I like it