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stdlib: add sumBy(function)

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This commit is contained in:
Ilya Ryzhenkov
2015-01-13 19:35:19 +03:00
parent 4ee64d7283
commit 1d4591d99c
3 changed files with 303 additions and 0 deletions
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libraries/stdlib/src/generated/_Aggregates.kt
+264
View File
@@ -2242,3 +2242,267 @@ public inline fun String.reduceRight(operation: (Char, Char) -> Char): Char {
return accumulator
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun <T> Array<out T>.sumBy(transform: (T) -> Int): Int {
var sum: Int = 0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun BooleanArray.sumBy(transform: (Boolean) -> Int): Int {
var sum: Int = 0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun ByteArray.sumBy(transform: (Byte) -> Int): Int {
var sum: Int = 0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun CharArray.sumBy(transform: (Char) -> Int): Int {
var sum: Int = 0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun DoubleArray.sumBy(transform: (Double) -> Int): Int {
var sum: Int = 0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun FloatArray.sumBy(transform: (Float) -> Int): Int {
var sum: Int = 0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun IntArray.sumBy(transform: (Int) -> Int): Int {
var sum: Int = 0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun LongArray.sumBy(transform: (Long) -> Int): Int {
var sum: Int = 0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun ShortArray.sumBy(transform: (Short) -> Int): Int {
var sum: Int = 0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun <T> Iterable<T>.sumBy(transform: (T) -> Int): Int {
var sum: Int = 0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun <T> Stream<T>.sumBy(transform: (T) -> Int): Int {
var sum: Int = 0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun String.sumBy(transform: (Char) -> Int): Int {
var sum: Int = 0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun <T> Array<out T>.sumByDouble(transform: (T) -> Double): Double {
var sum: Double = 0.0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun BooleanArray.sumByDouble(transform: (Boolean) -> Double): Double {
var sum: Double = 0.0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun ByteArray.sumByDouble(transform: (Byte) -> Double): Double {
var sum: Double = 0.0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun CharArray.sumByDouble(transform: (Char) -> Double): Double {
var sum: Double = 0.0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun DoubleArray.sumByDouble(transform: (Double) -> Double): Double {
var sum: Double = 0.0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun FloatArray.sumByDouble(transform: (Float) -> Double): Double {
var sum: Double = 0.0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun IntArray.sumByDouble(transform: (Int) -> Double): Double {
var sum: Double = 0.0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun LongArray.sumByDouble(transform: (Long) -> Double): Double {
var sum: Double = 0.0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun ShortArray.sumByDouble(transform: (Short) -> Double): Double {
var sum: Double = 0.0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun <T> Iterable<T>.sumByDouble(transform: (T) -> Double): Double {
var sum: Double = 0.0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun <T> Stream<T>.sumByDouble(transform: (T) -> Double): Double {
var sum: Double = 0.0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by `transform` function from elements in the collection
*/
public inline fun String.sumByDouble(transform: (Char) -> Double): Double {
var sum: Double = 0.0
for (element in this) {
sum += transform(element)
}
return sum
}
libraries/stdlib/test/collections/IterableTests.kt
+9
View File
@@ -202,6 +202,15 @@ abstract class IterableTests<T : Iterable<String>>(val data: T, val empty: T) {
expect(0) { empty.count { it.startsWith("x") } }
}
Test
fun sumBy() {
expect(6) { data.sumBy { it.length() } }
expect(0) { empty.sumBy { it.length() } }
expect(3.0) { data.sumByDouble { it.length().toDouble() / 2 } }
expect(0.0) { empty.sumByDouble { it.length().toDouble() / 2 } }
}
Test
fun withIndices() {
var index = 0