Computer scienceProgramming languagesKotlinObject-oriented programmingObject-oriented programming usage

Extension functions

Declare an extension function

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How can you declare an extension function?

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fun Int.doubled() = 2 * Int

fun Int.doubled() = 2 * this

ext fun Int.doubled() = 2 * Int

ext fun Int.doubled() = 2 * this

extension fun Int.doubled() = 2 * Int

extension fun Int.doubled() = 2 * this

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