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println("Hello world!") |
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/** | |
* A base trait for custom enumerations | |
* | |
* <ol> | |
* <li>Have an abstract super class E for all your enum items.</li> | |
* <li>Generate case objects for each enumeration item of type E.</li> | |
* <li>Then add them to values set when you implement it.</li> | |
* </ol> | |
* | |
* Example: |
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object MerhabaScala { | |
def main(args: Array[String]): Unit = { | |
println("Merhaba Scala!") | |
} | |
} |
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def topla(sayi1: Int, sayi2: Int): Int = sayi1 + sayi2 | |
def toplamCiftMi(sayi1: Int, sayi2: Int): Boolean = { | |
val toplam: Int = topla(sayi1, sayi2) | |
val mod2: Int = toplam % 2 | |
mod2 == 0 | |
} |
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case class Insan(yas: Int) | |
object NedenScala { | |
def main(args: Array[String]) { | |
val insanlar = for (i <- 1 to 10) yield Insan(scala.util.Random.nextInt(30) + 5) | |
println("İnsanlar:") | |
insanlar foreach println | |
println("Yaşları toplamı:") | |
println(insanlar.foldLeft(0)(_ + _.yas)) | |
} |
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class Insan { | |
private int yas; | |
public Insan(int yas) { | |
this.yas = yas; | |
} | |
public int yas() { | |
return yas; | |
} |
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val a: Char = 'a' | |
val b: Int = 3 | |
val c: Long = 5 | |
val d: Boolean = true | |
// Scala Double'ı Float'a tercih eder. Özellikle Float istediğimiz için tür dönüşümü yapıyoruz. | |
val e: Float = (3.14).asInstanceOf[Float] | |
val f: String = "e" | |
val any1: Array[Any] = Array(a, b, c, d, e, f) |
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def dogru(a: String, b: Int, c: Boolean): Long = { | |
// Burada Long türünde bir değer olacak. | |
} | |
// Metodun dönüş değerinin türü de çıkarımla bulunabilir çünkü gövdedeki son ifadenin değeri geri döndürülecek. | |
// Haliyle metodun dönüş değerinin türü de bu son ifadenin değerinin türü olacak. | |
// Dolayısıyla metod imzasından dönüş türünü atabiliriz. | |
def buDaDogru(a: String, b: Int, c: Boolean) = dogru(a, b, c) | |
// Bu hata verecek çünkü Scala statik türlü. |
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var sayi: Int = 6 | |
var metin = "Sayı çift mi?" | |
var ciftMi: Boolean = _ | |
println("Sayı: " + sayi) | |
println(metin + " " + ciftMi) | |
ciftMi = sayi % 2 == 0 | |
println("Tekrar bak.") |
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val sayi: Int = 6 | |
val metin = "Sayı çift mi?" | |
// Bu hata verecek. | |
val ciftMi: Boolean = _ | |
// Bu da hata verecek. | |
sayi = 5 |
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