Internally, a slice variable is a SliceHeader struct
(see https://golang.org/pkg/reflect/#SliceHeader), NOT a pointer to it.
Note that len and cap
are properties of the SliceHeader struct, NOT of the backing array.
So yes, I made a mistake, the x slice header is copied into z at every
iteratio
And more, if you assign a slice to another at the beginning will have the
same pointer, until one of them will change the capacity.
https://play.golang.org/p/BWG5tqayj9
On Monday, March 6, 2017 at 12:12:10 AM UTC+2, db0...@gmail.com wrote:
>
> This happens only because z is copied every time, bu
example: https://play.golang.org/p/d9KSHScDbL
On Monday, March 6, 2017 at 12:12:10 AM UTC+2, db0...@gmail.com wrote:
>
> This happens only because z is copied every time, but has nothing to do
> with interfaces. This exhibits the same behavior without interface{}:
> https://play.golang.org/p/C5K
z isn't copied, append will return another pointer only if the capacity
will change, but the slice was created from the beginning with enough cap.
On Monday, March 6, 2017 at 12:12:10 AM UTC+2, db0...@gmail.com wrote:
>
> This happens only because z is copied every time, but has nothing to do
>
This happens only because z is copied every time, but has nothing to do
with interfaces. This exhibits the same behavior without
interface{}: https://play.golang.org/p/C5KoUST4Zn
You could in fact modify the slice's existing content, but not the slice
itself. For example:
x := make([]int, 1, 5
All assignments are a copy, so there's no way to modify a slice value that
is in an interface{}
Just like if this were a function argument, you will need a pointer in
order to modify the value.
https://play.golang.org/p/kOdXUCiT_F
On Thursday, March 2, 2017 at 9:01:48 AM UTC-5, Cornel Damian
If you look where the slice is printed you will see that the data is
missing. In the working example from me the data is there.
And even so, your example doesn't help me, what i've set there is just for
example, i my code each time i add data to the slice i must first cast it.
On Thursday, March
On Thu, Mar 2, 2017 at 2:46 PM wrote:
> Can somebody explain me why?
Did you mean https://play.golang.org/p/GUVZBUQlEj ?
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