July 2018
Intermediate to advanced
242 pages
8h 6m
English
Content preview from Kotlin Standard Library Cookbook
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We could also use another version of the joinToString() function to simplify the logic of our generateRecipientsString() function implementation:
fun generateRecipientsString(recipients: List<Address?>): String = recipients.filterNotNull() .joinToString(", ", "To: ", "<br/>") { it.emailAddress }
As you can see, it takes the additional argument in the form of an inlined lambda block, which acts as a transformation function that is being applied to each of the recipients collection elements.
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