On Wednesday, August 3, 2016 at 11:46:43 PM UTC+8, Axel Wagner wrote:
>
> True, but it would still be just the same loop, it wouldn't actually be
> significantly faster. And you'd need to put quite some machinery into a
> pretty rarely used functionality, which means it also wouldn't be cleaner.
>
> The thing is, that the memory representation of []T and []J, with J being
> an interface type, is very different form each other and differs also for
> each (T, J) pair, AIUI. So you can't really efficiently generalize this.
> The only thing it could possibly safe you, is writing the actual loop and
> in general go doesn't really do this kind of tradeoff (saving small amounts
> of trivial work by complicating the language and -implementation).
>
so the copy buitlin function is not essential?
>
> On Wed, Aug 3, 2016 at 5:19 PM, T L <tapi...@gmail.com <javascript:>>
> wrote:
>
>>
>>
>> On Wednesday, August 3, 2016 at 10:54:29 PM UTC+8, Axel Wagner wrote:
>>>
>>> Why is converting it in a loop "neither clean nor efficient"? It seems
>>> to be both to me: a) It's clean, as it's type-safe, so much less can go
>>> wrong and it's obvious what it does and b) it's efficient, becaue a
>>> func([]T) []interface{} would need to use reflection, just to also have the
>>> same loop (but a less efficient one, as every operation would need to
>>> reflect). So, writing a loop would, in fact, be *more* efficient and clean
>>> than a function.
>>>
>>
>> If the functionality is provided by builltin package, the reflection is
>> not needed, just like the copy builtin function.
>>
>>
>>>
>>> On Wed, Aug 3, 2016 at 4:35 PM, T L <tapi...@gmail.com> wrote:
>>>
>>>> Often, I need converting a []T to []interface{} to use the []interface
>>>> as a variable length parameter.
>>>> But converting a []T for []interface{} in a for loop is neither clean
>>>> nor efficient.
>>>>
>>>> So is there a function in standard lib to convert []T to a
>>>> []interface{}?
>>>>
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>>>
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>
>
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