Extract string between two strings in Scala

Question

I have a sequence of strings like these:

val foo = Seq("bar scala baz", "bar java baz", "bar python baz")

I need to extract everything between bar and baz such that I get something like this:

val foobarbaz = Seq("scala", "java", "python")

How do I do this using regular expressions in Scala?

elm · Accepted Answer · 2014-08-26 08:57:59Z

8

Not necessarily with regular expressions, consider String strip methods, like this,

foo.map { _.stripPrefix("bar").stripSuffix("baz").trim }
res: Seq[String] = List(scala, java, python)

answered Aug 26, 2014 at 8:57

elm

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Comments

tiran · Accepted Answer · 2014-08-26 08:50:28Z

5

Try this

val regex = "^bar(.*)baz$".r
val foobarbaz = foo.collect { case regex(a) => a.trim }

answered Aug 26, 2014 at 8:50

tiran

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Xavier Guihot · Accepted Answer · 2019-04-06 20:30:20Z

2

Starting Scala 2.13, it's possible to pattern match a Strings by unapplying a string interpolator:

// val foo = Seq("bar scala baz", "bar java baz", "bar python baz")
foo.map { case s"bar $lang baz" => lang }
// List("scala", "java", "python")

answered Apr 6, 2019 at 20:30

Xavier Guihot

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