so working through the Koans and I m on Collections Filter m kotlinlang #getting-started

so working through the Koans and I'm on Collection...

jordan_k_miles

06/14/2017, 2:59 PM

so working through the Koans and I'm on Collections - Filter map. why does

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

work but

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

gives me the error: ``No value passed for parameter name``

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