CODEWITHSUNDEEP
scalarandom
FelixHJ
FelixHJ

Reputation: 1101

Generate alphanumeric string

I need some test company-names, like "rnd_company_blah23haf9", "rnd_company_g356fhg57" etc.

Is it possible to do something like

import scala.util.Random
val company = s"rnd_company_${Random.alphanumeric take 10 ?????}"

provided someone can fill out ????? of course.

Upvotes: 6

Views: 14841

Answers (3)

rogermenezes
rogermenezes

Reputation: 1143

Something verbose than the above answers but this one helps you to constrain the alphabet:

def randomText(textLength: Int = 10, alphabet: List[Char] = ('a' to 'd').toList) = {
    (1 to textLength).toList.map { charPos =>
        val randomIndex = (Math.random() * alphabet.length).floor.toInt
        alphabet(randomIndex)
    }.mkString("")
}

Upvotes: 0

Marth
Marth

Reputation: 24812

Use .mkString("") to create a String from the Stream :

scala> val company = s"rnd_company_${Random.alphanumeric take 10 mkString}"
company: String = rnd_company_BbesF0EY1o

Upvotes: 23

Carlos Vilchez
Carlos Vilchez

Reputation: 2804

You have an example here

scala> val x = Random.alphanumeric
x: scala.collection.immutable.Stream[Char] = Stream(Q, ?)

scala> x take 10 foreach println
Q
n
m
x
S
Q
R
e
P
B

So you can try this:

   import scala.util.Random 
   val company = s"rnd_company_${(xx take 10).mkString}"

Upvotes: 3

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