CODEWITHSUNDEEP
scalafunctionmethodsvariadic-functions
Daniel
Daniel

Reputation: 105

Scala - Variable amount of function arguments as method parameters

I am a newbie fascinated by Scala looking for a way of creating a method/function that takes a variable amount of functions as parameters.

Example with the * notation used in regular VarArgs

def someMethod(aNumber: Int, multipleFunctions: Int => Boolean*) = {
    var flag = true
    for (func <- multipleFunctions; if (!func(aNumber)) flag = false
    flag
}

I realize I could accept an array of functions, but if that works it just feels like there must be a way of doing it with var args.

Upvotes: 1

Views: 109

Answers (1)

stefanobaghino
stefanobaghino

Reputation: 12804

The * token is evaluated with precedence over =>, so you can simply solve your problem by wrapping the Int => Boolean type in parentheses:

def someMethod(aNumber: Int, multipleFunctions: (Int => Boolean)*)
//                                              ^     here!    ^

Upvotes: 1

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