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Scala foi projetado para interoperar bem com ambientes de programação populares

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Descrição
Exemplo
object HelloWorld { def main(args: Array[String]) { println("Hello, world!") } }   Scala foi projetado para interoperar bem com ambientes de programação populares tais como Java (JRE ou Runtime Environment) e C# (.NET CLR) que combinam compilação e interpretação  
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> scalaca HelloWorld.scala   Para compilar o código deve usar o scalac (compilador Scala).  
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> scala - classpath . HelloWorld   O código fonte após compilado é hora de executar o progrma, para isso deve invocar a classe gerada pelo compilador.  
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import scala.util.matching.Regex object Test { def main(args: Array[String]) { val pattern = new Regex("(S|s)cala") val str = "Scala is scalable and cool" println((pattern findAllIn str).mkString(",")) } }   O método mkString() pode ser usado para concatenar a lista resultante, em seguida usar um pipe (|) para procurar variações da palavra Scala e pode usar a classe Regex.  
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object Test { def main(args: Array[String]) { val pattern = "(S|s)cala".r val str = "Scala is scalable and cool" println(pattern replaceFirstIn(str, "Java")) } }   O método replaceFirstIn() substitui a primeira palavra (Scala) de uma cadeia de sting pela palavra Java.  
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import scala.util.matching.Regex object Test { def main(args: Array[String]) { val pattern = "Scala".r val str = "Scala is Scalable and cool" println(pattern findFirstIn str) } }   Scala suporta expressões regulares através da classe Regex disponível no pacote scala.util.matching.  
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