Ah right. Thanks!
On Fri, Nov 14, 2014 at 12:54 AM, Mauro <mauro...@runbox.com> wrote:
>
> On Fri, 2014-11-14 at 04:56, Amuthan A. Ramabathiran <apar...@gmail.com>
> wrote:
> > Hello,
> >
> > I ran into this problem recently:
> >
> > julia> a = Array{Int,1}[]
> > 0-element Array{Array{Int64,1},1}
> >
> > julia> b = zeros(Int,2)
> > 2-element Array{Int64,1}:
> > 0
> > 0
> >
> > julia> b[1] = 1
> > 1
> >
> > julia> push!(a,b)
> > 1-element Array{Array{Int64,1},1}:
> > [1,0]
> >
> > julia> b[1] = -1
> > -1
> >
> > julia> push!(a,b)
> > 2-element Array{Array{Int64,1},1}:
> > [-1,0]
> > [-1,0]
> >
> >
> > I'm wondering why a[1] changes to [-1,0]. Is it because only a reference
> to
> > b is stored when it is pushed to a? Are there any simple solutions to
> avoid
> > this?
>
> Correct. You can copy b before inserting:
>
> push!(a,copy(b))
>
> I think there is an entry in the FAQ about mutability.
>
