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Implement reduceIndexedOrNull and reduceRightIndexedOrNull #KT-36866

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This commit is contained in:
Abduqodiri Qurbonzoda
2020-03-06 13:49:22 +03:00
parent b60633d79a
commit b1fac4e721
13 changed files with 964 additions and 0 deletions
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libraries/stdlib/samples/test/samples/collections/collections.kt
+2
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@@ -698,6 +698,7 @@ class Collections {
fun reduceOrNull() {
val strings = listOf("a", "b", "c", "d")
assertPrints(strings.reduceOrNull { acc, string -> acc + string }, "abcd")
assertPrints(strings.reduceIndexedOrNull { index, acc, string -> acc + string + index }, "ab1c2d3")
assertPrints(emptyList<String>().reduceOrNull { _, _ -> "" }, "null")
}
@@ -706,6 +707,7 @@ class Collections {
fun reduceRightOrNull() {
val strings = listOf("a", "b", "c", "d")
assertPrints(strings.reduceRightOrNull { string, acc -> acc + string }, "dcba")
assertPrints(strings.reduceRightIndexedOrNull { index, string, acc -> acc + string + index }, "dc2b1a0")
assertPrints(emptyList<String>().reduceRightOrNull { _, _ -> "" }, "null")
}