On Tue, Aug 1, 2017 at 2:43 PM, roger peppe wrote:
> On 1 August 2017 at 19:33, Josh Humphries wrote:
> > On Tue, Aug 1, 2017 at 11:44 AM, roger peppe wrote:
> >>
> >> On 1 August 2017 at 13:57, Josh Humphries
> wrote:
> >> > Although that solution creates a heap-allocated tmp for every elemen
On 1 August 2017 at 19:33, Josh Humphries wrote:
> On Tue, Aug 1, 2017 at 11:44 AM, roger peppe wrote:
>>
>> On 1 August 2017 at 13:57, Josh Humphries wrote:
>> > Although that solution creates a heap-allocated tmp for every element in
>> > the
>> > slice. Using an interface, the value will be i
On Tue, Aug 1, 2017 at 11:44 AM, roger peppe wrote:
> On 1 August 2017 at 13:57, Josh Humphries wrote:
> > Although that solution creates a heap-allocated tmp for every element in
> the
> > slice. Using an interface, the value will be inlined instead of
> > heap-allocated if it fits without boxi
On 1 August 2017 at 13:57, Josh Humphries wrote:
> Although that solution creates a heap-allocated tmp for every element in the
> slice. Using an interface, the value will be inlined instead of
> heap-allocated if it fits without boxing (so most primitive types and
> pointer types won't need heap
On Tue, Aug 1, 2017 at 2:58 PM Josh Humphries wrote:
> Using an interface, the value will be inlined instead of heap-allocated
if it fits without boxing (so most primitive types and pointer types won't
need heap allocation).
This was true some years ago, but it is no more.
--
-j
--
You rece
Although that solution creates a heap-allocated tmp for every element in
the slice. Using an interface, the value will be inlined instead of
heap-allocated if it fits without boxing (so most primitive types and
pointer types won't need heap allocation).
*Josh Humphries*
jh...@bluegosling.com
FWIW, you don't have to use Interface to do the swap:
https://play.golang.org/p/O8lGJGGOXP
On 31 July 2017 at 15:18, eZio Pan wrote:
> Hello,
> I want to build a "universal slice reverser" with reflect.MakeFunc. But I
> don't know how to get a copy of reflect.Value's underlying value, which make
You have to use a temporary to swap the values:
tmp := a.Interface()
a.Set(b)
b.Set(reflect.ValueOf(tmp))
*Josh Humphries*
jh...@bluegosling.com
On Mon, Jul 31, 2017 at 10:18 AM, eZio Pan wrote:
> Hello,
> I want to build a "universal slice reverser" with reflect.MakeFunc. But I
> don't
On Mon, Jul 31, 2017 at 4:18 PM eZio Pan wrote:
> My code return [7 6 5 5 6 7], but excepting result is [7 6 5 4 3 2]
https://play.golang.org/p/yraJZFDjS3
--
-j
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Hello,
I want to build a "universal slice reverser" with reflect.MakeFunc. But I
don't know how to get a copy of reflect.Value's underlying value, which
make result not correct.
Here is the code:
package main
import (
"fmt"
"reflect"
)
func reverse(in []reflect.Value) (out []reflect.Value) {
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