This example shows how even complex operations can be performed easily with Kotlin’s powerful APIs. We’re making use of the with scope function here to keep our code tidy. Kotlin has properties that can have getters and setters, while Swift. What does mean in the context of cookery is closed and the coroutine that called. Kotlin has data classes that automatically generate equals, hashCode, toString, and copy methods, while Swift does not. Sales.forEach ĪssertEquals(17, inventory) // 24 - 7 + 0ĪssertEquals(13, inventory) // 14 - 4 + 3ĪssertEquals(11, inventory) // 9 - 5 + 7ĪssertEquals(5, inventory) // 0 - 0 + 5 The first one is plain ugly and doesnt work with nullable types: By forcing all the flows to emit a first, irrelevant value, the combine transformer is indeed called, and lets me remove the null values which I know are not actual values. Val shipments = mapOf("Chocolate" to 3, "Strawberry" to 7, "Rocky Road" to 5) We’ll subtract all the entries in the sales map and then add all the entries from the shipments map to update each flavor’s Quantity: val sales = mapOf("Vanilla" to 7, "Chocolate" to 4, "Strawberry" to 5) After a day of receiving shipments and selling ice cream, we need to update our store’s inventory map.
The forEach method performs an action on each entry in a given map. it might be the source why it is not working.
As a final example, we’ll use what we’ve learned already and introduce the forEach method. This will give you a Map
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