Assigning to slice is quite different from taking a slice.
On Mon, Mar 7, 2016 at 9:49 PM, Daniel Carrera <[email protected]> wrote:
> That is not literally true:
>
> vals[2:3] = vals[3:4]
>
>
> On Tuesday, 8 March 2016 02:37:26 UTC+1, John Myles White wrote:
>>
>> Array indexing produces a brand new array that has literally no
>> relationship with the source array.
>>
>> -- John
>>
>> On Monday, March 7, 2016 at 5:21:34 PM UTC-8, Daniel Carrera wrote:
>>>
>>> Hello,
>>>
>>> Some Julia functions act on their inputs. For example:
>>>
>>> julia> vals = [6,5,4,3]
>>> 4-element Array{Int64,1}:
>>> 6
>>> 5
>>> 4
>>> 3
>>>
>>> julia> sort!(vals);
>>>
>>> julia> vals
>>> 4-element Array{Int64,1}:
>>> 3
>>> 4
>>> 5
>>> 6
>>>
>>>
>>> However, it looks like these functions do not modify array slices:
>>>
>>> julia> vals = [6,5,4,3]
>>> 4-element Array{Int64,1}:
>>> 6
>>> 5
>>> 4
>>> 3
>>>
>>> julia> sort!(vals[2:end])
>>> 3-element Array{Int64,1}:
>>> 3
>>> 4
>>> 5
>>>
>>> julia> vals
>>> 4-element Array{Int64,1}:
>>> 6
>>> 5
>>> 4
>>> 3
>>>
>>>
>>> Can anyone explain to me why this happens? Is this a language feature?
>>> Is it at all possible to make a destructive function that acts on slices?
>>>
>>> Cheers,
>>> Daniel.
>>>
>>>
