lop.PartitionBy does not guarantee the same order

[nicewook]

I have tested the example of lop.PartitionBy on README.md It keep changed the order

[dengyunsheng250]

well i have tested in bash file and it always return the same result

[nicewook]

sorry for confusion. I mean the parallel version. belows are my test and the result

func ExamplePartitionByParallel3() {
    partitions := lop.PartitionBy([]int{-2, -1, 0, 1, 2, 3, 4, 5}, func(x int) string {
        if x < 0 {
            return "negative"
        } else if x%2 == 0 {
            return "even"
        }
        return "odd"
    })
    fmt.Println(partitions)
    // Output:
    // [[-2 -1], [0 2 4], [1 3 5]]
}

result

=== RUN   ExamplePartitionByParallel3
--- FAIL: ExamplePartitionByParallel3 (0.00s)
got:
[[5 1 3] [2 4 0] [-2 -1]]
want:
[[-2 -1], [0 2 4], [1 3 5]]