Created
February 27, 2015 12:52
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object Main extends App { | |
val nomes = Seq("Twing","Twing","Twofi") | |
def imprimirSeq(seq: Seq[String], filtro: Filtro){ | |
val filtrados = filtro.filtrar(seq) | |
filtrados.foreach(println) | |
} | |
imprimirSeq(nomes, new FiltrarPorNome("Twing")) | |
imprimirSeq(nomes, new FiltrarPorComecarCom("Tw")) | |
imprimirSeq(nomes, new Filtro { | |
def override filtrar(valores: seq[String]) = { | |
nomes.filter(n => n.endsWith("fi")) | |
} | |
}) | |
def imprimirSeqFun(seq: Seq[String], filtro: Seq[String] => Seq[String]){ | |
val filtrados = filtro(seq) | |
filtrados.foreach(println) | |
} | |
def imprimirSeqFun2(seq: Seq[String], filtro: String => Boolean) { | |
val filtrados = seq.filter(filtro) | |
filtrados.foreach(println) | |
} | |
def filtrarPorNome(nome: String)(nomes: Seq[String]) = { | |
nomes.filter(n => n.equals(nome)) | |
} | |
def filtrarPorComecarCom(nome: String)(nomes: Seq[String]) = { | |
nomes.filter(n => n.startsWith(nome)) | |
} | |
imprimirSeqFun(nomes, filtrarPorNome("Twing") ) | |
imprimirSeqFun(nomes, filtrarPorComecarCom("Tw")) | |
imprimirSeqFun(nomes, n => n.filter(_.equals("Twofi"))) | |
imprimirSeqFun2(nomes, n => n.equals("Twofi")) | |
imprimirSeqFun2(nomes, _.equals("Twofi")) | |
} | |
abstract class Filtro { | |
def filtrar(lista: Seq[String]): Seq[String] | |
} | |
class FiltrarPorNome(val nome: String) extends Filtro { | |
override def filtrar(lista: Seq[String]): Seq[String] = { | |
import scala.collection.mutable.ListBuffer | |
var novaLista: ListBuffer[String] = ListBuffer.empty | |
for(valor <- lista) { | |
if(valor.equals(nome)) | |
novaLista += valor | |
} | |
novaLista.toSeq | |
} | |
} | |
class FiltrarPorComecarCom(val nome: String) extends Filtro { | |
override def filtrar(lista: Seq[String]): Seq[String] = { | |
import scala.collection.mutable.ListBuffer | |
var novaLista: ListBuffer[String] = ListBuffer.empty | |
for(valor <- lista) { | |
if(valor.startsWith(nome)) | |
novaLista += valor | |
} | |
novaLista.toSeq | |
} | |
} |
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