I do want to compare indexes. Is that something possible to do?
In my real code I have other criteria to compare the slice items, but if
they tie, I want to use the reverse of their original order.
I expect `return i > j` to put items with larger index numbers at the
front, why that doesn't seem to be the case?
On Wednesday, December 7, 2022 at 11:13:12 AM UTC+8 eric.h...@gmail.com
wrote:
> sort.Slice(s, func(i, j int) bool { return i > j })
>
> You are comparing the indexes and not the values
>
> -Eric
> http://www.google.com/profiles/eric.hubbard
>
>
> On Tue, Dec 6, 2022 at 6:45 PM Andrew Harris <harr...@spu.edu> wrote:
>
>> Subtly:
>> return s[i] > s[j]
>>
>> Is the right sort func
>>
>> I think it'd be recommended to look at the generics slices package, which
>> also has a sort
>> On Tuesday, December 6, 2022 at 6:39:29 PM UTC-8 hey...@gmail.com wrote:
>>
>>> Hi,
>>>
>>> I have this very simple sorting code:
>>>
>>> s := make([]int, 0, 100)
>>> for i := 1; i <= 20; i++ {
>>> s = append(s, i)
>>> }
>>> sort.Slice(s, func(i, j int) bool { return i > j })
>>> log.Print(s)
>>>
>>> I expect it to print numbers in reverse order, since items with larger
>>> index numbers should be at the front. However, at lease in go1.19.3, it
>>> prints
>>>
>>> [9 1 8 5 16 3 20 2 10 7 12 13 14 15 6 4 19 18 17 11]
>>>
>>> I guess I must have misunderstood how the sort package works, but
>>> rereading sort's doc multiple time doesn't help answer the question.
>>>
>>> Could anyone shed some light?
>>>
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