10000 Examples for binding patterns to variables by gkepka · Pull Request #3071 · scala/docs.scala-lang · GitHub
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Merged
merged 2 commits into from
Oct 26, 2024
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Examples for binding patterns to variables #3071

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07a0c46
Examples for binding patterns to variables
gkepka Sep 8, 2024
8ec1d34
Fix double declaration of classes and functions
gkepka Sep 15, 2024
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Fix double declaration of classes and functions
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@gkepka
gkepka committed Sep 15, 2024
commit 8ec1d34527adb813140a26254b47510ffddcf3aa
20 changes: 2 additions & 18 deletions _tour/pattern-matching.md
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Expand Up @@ -242,31 +242,15 @@ You can use variable binding to get type-dependent behavior while simultaneously
{% tabs pattern-matching-variable-binding class=tabs-scala-version %}
{% tab 'Scala 2' for=pattern-matching-variable-binding %}
```scala mdoc
sealed trait Device
case class Phone(model: String) extends Device {
def screenOff = "Turning screen off"
}
case class Computer(model: String) extends Device {
def screenSaverOn = "Turning screen saver on..."
}

def goIdle(device: Device): String = device match {
def goIdleWithModel(device: Device): String = device match {
case p @ Phone(model) => s"$model: ${p.screenOff}"
case c @ Computer(model) => s"$model: ${c.screenSaverOn}"
}
```
{% endtab %}
{% tab 'Scala 3' for=pattern-matching-variable-binding %}
```scala
sealed trait Device
case class Phone(model: String) extends Device:
def screenOff = "Turning screen off"

case class Computer(model: String) extends Device:
def screenSaverOn = "Turning screen saver on..."


def goIdle(device: Device): String = device match
def goIdleWithModel(device: Device): String = device match
case p @ Phone(model) => s"$model: ${p.screenOff}"
case c @ Computer(model) => s"$model: ${c.screenSaverOn}"
```
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