exercises-stdlib
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scala-exercises
Fix Sets "tuple" example because it's misleading
This example is incorrect. The statement
Set(1,2,3) - (1,2)
(for example) does not use a tuple at all, it's the same thing as this:
Set(1,2,3).-(1,2)
Which is calling the overloaded version of the - method of Set which
accepts two initial arguments plus a varadiac list of however many
elements you want which allows you to do things like
Set(1,2,3,4) - (1,2,3,4,5) // etc
No where in this are tuples ever actually used. And to say so (as it does currently) is misleading to programmers trying to use scala-exercises as a way of learning the standard library. If you DID try to use a tuple it would not work:
Set(1,2,3) - ((1,2)) //this will not compile
because the types to not align.
@EdgeCaseBerg thanks for the clarifications. Can we keep the number of args in the exercise the same as before so already answered exercises remain correct for users that have already completed them? thanks!
Hey @raulraja
Sorry for the late response, I can change the number of arguments in the exercise to be the same. I think I'll have to remove the example around val anotherNewSet = mySet - ("Michigan", "Ohio", "Iowa") // You can pass as 2 or more arguments, this method is varadiac! and just note that the method is varadiac and what that means in the comment for the pre-existing test.