October 2021
Intermediate to advanced
500 pages
16h 23m
English
Content preview from Kotlin Programming: The Big Nerd Ranch Guide, 2nd Edition
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Defining Shared Code
Doubloons4Gold’s core logic will be defined in the commonMain directory. This will allow you to write the parts of your application that are specific to your problem – and not the platform – once, including the exchange rate, prompts shown to the user, and input requests. You can then use these implementations on all platforms without modifications. (In fact, if you accidentally tried to use a platform-specific API in this directory, IntelliJ would respond with an error.)
Get started by making a new file in src/commonMain/kotlin called Converter.kt. Create a convertCurrency function take care of your currency conversion:
Listing 24.2 Converting currencies (commonMain/kotlin/Converter.kt)
val pricePerDoubloon ...
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