macOS init method question (Hillegass)

[GorillaPaws]

I'm working through Hillegass and came across this override of the init method in the lottery app.

- (id) init 
{
     [super init];
     firstNumber = random() % 100 +1;
     secondNumber = random () % 100 + 1;
     return self;
}

It got me wondering when is it ok to "do work" in the init of a class instead of writing a separate method. My instinct would have been to initialize firstNumber and secondNumber to 0, and to use a separate method call to assign their values to a random number. This would make the code more clear as to when/where the values were being randomized (especially in an app who's primary purpose is generating random numbers).

Thanks in advance for any insight you can share.

 

[lee1210]

If any operation on the object depends on those values being set "randomly", then init setting them seems fine to me. Not calling randomize() seems questionable, though.

-Lee