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Merge branch 'main' of github.com:duke-git/lancet

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dudaodong
2023-03-29 10:15:56 +08:00
parent 05772d8d7d 3b497532f3
commit da69b77892
2 changed files with 6 additions and 5 deletions
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2
slice/slice.go
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@@ -1094,7 +1094,7 @@ func IndexOf[T comparable](arr []T, val T) int {
// LastIndexOf returns the index at which the last occurrence of the item is found in a slice or return -1 if the then cannot be found. // LastIndexOf returns the index at which the last occurrence of the item is found in a slice or return -1 if the then cannot be found.
// Play: https://go.dev/play/p/DokM4cf1IKH // Play: https://go.dev/play/p/DokM4cf1IKH
func LastIndexOf[T comparable](slice []T, item T) int { func LastIndexOf[T comparable](slice []T, item T) int {
for i := len(slice) - 1; i > 0; i-- { for i := len(slice) - 1; i >= 0; i-- {
if item == slice[i] { if item == slice[i] {
return i return i
} }

5
slice/slice_test.go
View File

@@ -873,8 +873,9 @@ func TestIndexOf(t *testing.T) {
func TestLastIndexOf(t *testing.T) { func TestLastIndexOf(t *testing.T) {
assert := internal.NewAssert(t, "TestLastIndexOf") assert := internal.NewAssert(t, "TestLastIndexOf")
arr := []string{"a", "a", "b", "c"} arr := []string{"a", "b", "b", "c"}
assert.Equal(1, LastIndexOf(arr, "a")) assert.Equal(0, LastIndexOf(arr, "a"))
assert.Equal(2, LastIndexOf(arr, "b"))
assert.Equal(-1, LastIndexOf(arr, "d")) assert.Equal(-1, LastIndexOf(arr, "d"))
} }