Created
October 4, 2020 06:25
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Kotlin: Find sum of all values produced by the selector function applied to each element in the collection
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| val sumByDouble = | |
| data.sumByDouble { serviceGroup: PackageDetails.ServiceGroup -> serviceGroup.serviceItems.price } | |
| ++++++++++++++++++++++++++++++++++++++++++ | |
| val nums = listOf(10, 20, 30) | |
| println(nums.sum()) | |
| val totalQuantity: Int = products.map { it.quantity }.sum() | |
| ++++++++++++++++++++++++++++++++++++++++++ | |
| val nums = listOf(10, 20, 30) | |
| println(nums.sumBy { it }) | |
| println(nums.sumBy { it * 2 }) | |
| val doubles = listOf(1.05, 2.05, 3.65) | |
| println(doubles.sumBy { it.roundToInt() }) |
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