How to create a string like "?, ?, ?, ?, ?, ?, ? " in Scala?

Question

I want to definite a function like createString:

def createString(n: Int): String = {
    // do something here
    result = "?, ?, ?, ?, ?, ?, ? " // thera are n "? " in result
    result
}

As I know, ["? "]*n is the easy way in Python. But I don't know how to do it with Scala. What shoule I do?

From the duplicate, it looks like "multiplying" a string by a number works in Scala like in Python. — Silvio Mayolo, Aug 18 '18 at 02:40

score 5 · Accepted Answer · answered Aug 18 '18 at 02:47

5

I think you can find your answer here

scala> List.fill(10)("? ") # Similar to ["? "] * n in Python                                                                                          
res0: List[String] = List("? ", "? ", "? ", "? ", "? ", "? ", "? ", "? ", "? ", "? ")
scala> "?, " * 10                                                                                                    
res1: String = "?, ?, ?, ?, ?, ?, ?, ?, ?, ?, "

answered Aug 18 '18 at 02:47

Minh Ha Pham

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This is what I really want, Thank u! – J.Doe Aug 18 '18 at 02:49
In order to avoid the trailing `","`, you can use: `List.fill(10)("?").mkString(", ")` – Samik R Jul 30 '20 at 08:47

How to create a string like "?, ?, ?, ?, ?, ?, ? " in Scala?

1 Answers1