You can however do this ``` fun Shop getCitiesCustomersAreFr kotlinlang #getting-started

You can however do this ``` fun Shop.getCitiesCus...

poohbar

06/14/2017, 3:02 PM

You can however do this

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fun Shop.getCitiesCustomersAreFrom(): Set<City> =
    this.customers.map{ customer -> customer.city }.toSet()

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