how to implement variable length argument function in scala

Question

I have to concatenate k different lengths of strings into one string res and save res string into ArrayBuffer[String]().
But the k is variable.
For example,

val result = new ArrayBuffer[String]()
result.+=("1\t" + A.toString() + "\t" + ls.pid + "\t" + ls.did + "\t" + ls.sid + "\t" + ls.request_time.substring(0,10))

result.+=("2\t" + B.toString() + "\t" + ls.pid + "\t" + ls.did + "\t" + ls.sid + "\t")

result.+=("2\t" + B.toString() + "\t" + ls.pid + "\t" + ls.did + "\t")

result.+=("2\t" + B.toString() + "\t")

How to use a function with a variable-length argument to implement it?

Thanks in advance.

Bondarenko · Accepted Answer · 2021-08-19 13:15:42Z

4

You can use the following syntax:

def f(args: String*) = {
    args.map{s =>
    //todo: process single item
    s
  }
}

answered Aug 19, 2021 at 13:15

Bondarenko

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1 Comment

Luis Miguel Mejía Suárez Over a year ago

I would just add the note that String* means is just a Seq[Sring] inside the method body so OP can do anything you can do on a sequence, like map or foldLef or foreach, etc.

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