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feat: add ReverseCopy
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@@ -70,6 +70,7 @@ import (
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- [FlatMap](#FlatMap)
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- [Merge](#Merge)
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- [Reverse](#Reverse)
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- [ReverseCopy](#ReverseCopy)
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- [Reduce<sup>deprecated</sup>](#Reduce)
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- [ReduceConcurrent](#ReduceConcurrent)
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- [ReduceBy](#ReduceBy)
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@@ -1760,6 +1761,38 @@ func main() {
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}
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```
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### <span id="ReverseCopy">ReverseCopy</span>
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<p>反转切片中的元素顺序, 不改变原slice。</p>
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<b>函数签名:</b>
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```go
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func ReverseCopy[T any](slice []T) []T
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](todo)</span></b>
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```go
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/slice"
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)
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func main() {
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strs := []string{"a", "b", "c", "d"}
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reversedStrs := slice.ReverseCopy(strs)
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fmt.Println(reversedStrs)
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fmt.Println(strs)
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// Output:
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// [d c b a]
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// [a b c d]
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}
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```
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### <span id="Reduce">Reduce</span>
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<p>将切片中的元素依次运行iteratee函数,返回运行结果。</p>
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@@ -70,6 +70,7 @@ import (
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- [FlatMap](#FlatMap)
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- [Merge](#Merge)
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- [Reverse](#Reverse)
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- [ReverseCopy](#ReverseCopy)
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- [Reduce<sup>deprecated</sup>](#Reduce)
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- [ReduceConcurrent](#ReduceConcurrent)
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- [ReduceBy](#ReduceBy)
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@@ -1756,6 +1757,38 @@ func main() {
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}
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```
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### <span id="ReverseCopy">ReverseCopy</span>
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<p>Return a new slice of element order is reversed to the given slice.</p>
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<b>Signature:</b>
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```go
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func ReverseCopy[T any](slice []T) []T
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```
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<b>Example:<span style="float:right;display:inline-block;">[Run](todo)</span></b>
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```go
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/slice"
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)
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func main() {
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strs := []string{"a", "b", "c", "d"}
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reversedStrs := slice.ReverseCopy(strs)
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fmt.Println(reversedStrs)
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fmt.Println(strs)
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// Output:
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// [d c b a]
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// [a b c d]
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}
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```
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### <span id="Reduce">Reduce</span>
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<p>Reduce slice.</p>
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@@ -1002,7 +1002,19 @@ func Reverse[T any](slice []T) {
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}
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}
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// Shuffle the slice.
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// ReverseCopy return a new slice of element order is reversed to the given slice.
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// Play: todo
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func ReverseCopy[T any](slice []T) []T {
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result := make([]T, len(slice))
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for i, j := 0, len(slice)-1; i < len(slice); i, j = i+1, j-1 {
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result[i] = slice[j]
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}
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return result
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}
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// Shuffle return a new slice with elements shuffled.
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// Play: https://go.dev/play/p/YHvhnWGU3Ge
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func Shuffle[T any](slice []T) []T {
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rand.Seed(time.Now().UnixNano())
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@@ -937,6 +937,19 @@ func ExampleReverse() {
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// [d c b a]
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}
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func ExampleReverseCopy() {
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strs := []string{"a", "b", "c", "d"}
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reversedStrs := ReverseCopy(strs)
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fmt.Println(reversedStrs)
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fmt.Println(strs)
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// Output:
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// [d c b a]
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// [a b c d]
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}
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func ExampleIsAscending() {
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result1 := IsAscending([]int{1, 2, 3, 4, 5})
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@@ -1114,6 +1114,17 @@ func TestReverse(t *testing.T) {
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assert.Equal([]string{"e", "d", "c", "b", "a"}, s2)
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}
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func TestReverseCopy(t *testing.T) {
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t.Parallel()
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assert := internal.NewAssert(t, "TestReverseCopy")
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numbers := []int{1, 2, 3, 4, 5}
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reversedNumbers := ReverseCopy(numbers)
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assert.Equal([]int{5, 4, 3, 2, 1}, reversedNumbers)
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assert.Equal([]int{1, 2, 3, 4, 5}, numbers)
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}
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func TestDifference(t *testing.T) {
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t.Parallel()
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