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patryk-scalac-io/BasicLensUsage.scala

Created June 15, 2017 06:47
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BasicLensUsage.scala
// first create some Street value to play with
val street = Street("Abbey Road", 44)
street: Street = Street(Abbey Road,44)
// "focus" to street
nameLens.get(street)
// res0: String = Abbey Road
// set new street name
nameLens.set("Newton Street")(street)
// res2: Street = Street(Newton Street,44)
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