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krisajenkins/wat.scala

Created November 25, 2013 12:46
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Scala, we need to talk about what 'immutable' means.
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wat.scala
class Thing { var x = 5 }
val things = scala.collection.immutable.List(new Thing)
println(things.head.x) // Prints 5
things.head.x = 10 // WAT?
println(things.head.x) // Prints 10
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