Thank you. It solved my problem
On Friday, July 3, 2015 at 5:54:12 PM UTC+2, Kevin Squire wrote:
>
> I updated the README with another example based on this discussion.
>
> Cheers!
> Kevin
>
> On Fri, Jul 3, 2015 at 7:51 AM, Yichao Yu <yyc...@gmail.com <javascript:>>
> wrote:
>
>> On Fri, Jul 3, 2015 at 10:40 AM, Yichao Yu <yyc...@gmail.com
>> <javascript:>> wrote:
>> > On Fri, Jul 3, 2015 at 9:42 AM, Ali Rezaee <arv....@gmail.com
>> <javascript:>> wrote:
>> >> Thank you. What would be the work around? How can I push values to
>> >> defaultdict without changing any other value?
>> >
>> > The README I linked is exactly about that.
>>
>> And quote it here for future reference:
>>
>> > Note that in the last example, we need to use a function to create each
>> new `DefaultDict`. If we forget, we will end up using the same
>> `DefaultDict` for all default values:
>>
>> In their case, the value of a parent DefaultDict is also a DefaultDict
>> so it might be a little confusing. You can pretty much replace the
>> DefaultDict above by `Array` and it will apply to your case directly.
>>
>>
>> >
>> >>
>> >> On Friday, July 3, 2015 at 3:35:39 PM UTC+2, Yichao Yu wrote:
>> >>>
>> >>> On Fri, Jul 3, 2015 at 9:29 AM, Ali Rezaee <arv....@gmail.com> wrote:
>> >>> > Hi,
>> >>> >
>> >>> > I have the following code:
>> >>> >
>> >>> > using DataStrucures
>> >>> > d= DefaultDict(ASCIIString,Array{Int64},Array{Int64}(0))
>> >>> >
>> >>> > push!(d["A"],2)
>> >>> > push!(d["B"],3)
>> >>> >
>> >>> > d
>> >>> >
>> DataStructures.DefaultDict{ASCIIString,Array{Int64,N},Array{Int64,1}}
>> >>> > with 2
>> >>> > entries:
>> >>> > "B" => [2,3]
>> >>> > "A" => [2,3]
>> >>> >
>> >>> >
>> >>> > Isn't it unexpected that when I push to any key, the value is
>> pushed to
>> >>> > all
>> >>> > the other keys as well?
>> >>>
>> >>> Yes, pretty much. Because the default value is stored by reference and
>> >>> you are mutating it with `push!`
>> >>>
>> >>> See the last paragraph of the corresponding section in the
>> >>> DataStructures.jl README[1]
>> >>>
>> >>> [1]
>> >>>
>> https://github.com/JuliaLang/DataStructures.jl#defaultdict-and-defaultordereddict
>> >>>
>> >>> >
>> >>> > Thanks :)
>>
>
>
