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Kotlin enum
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@ -350,11 +350,22 @@ fun helloWorld(val name : String) {
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// Enum classes are similar to Java enum types.
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enum class EnumExample {
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A, B, C
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A, B, C // Enum constants are separated with commas.
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}
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fun printEnum() = println(EnumExample.A) // => A
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// Since each enum is an instance of the enum class, they can be initialized as:
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enum class EnumExample(val value: Int) {
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A(value = 1),
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B(value = 2),
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C(value = 3)
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}
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fun printProperty() = println(EnumExample.A.value) // => 1
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// Every enum has properties to obtain its name and ordinal(position) in the enum class declaration:
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fun printName() = println(EnumExample.A.name) // => A
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fun printPosition() = println(EnumExample.A.ordinal) // => 0
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/*
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The "object" keyword can be used to create singleton objects.
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We cannot instantiate it but we can refer to its unique instance by its name.
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