Yes, _ indicating that a parameter is not relevant is how it's used in Haskell. Though I do feel obligated to point out that, being lazy-evaluated, even if you

Yes, _ indicating that a parameter is not relevant is how it's used in Haskell. Though I do feel obligated to point out that, being lazy-evaluated, even if you do give a parameter a name it still won't be evaluated until you actually use it.