To answer myself: I didn't read the docs correctly. Or I got my types
mangled. Or both.
The final splice should be
splice!(a, 1:0, Vector{UInt8}[UInt8[7,3]])
not
splice!(a, 1:0, UInt8[7,3])
splice! splices in another collection, not a single element.
Interfaces are very informally defined in Julia aren't they? I don't see
there's any way to name an iterable something so that the def of splice!
could be eg
function splice!{E, T<:Integer}(a::Vector{E}, r::UnitRange{T},
ins::Iterable{E})
... which would have helped me not to trip over this problem
George
On Saturday, 23 July 2016 21:58:10 UTC+3, George Marrows wrote:
>
> Hi. As per the docs on splice! and n:(n-1) ranges, the following works
> fine to insert a value before location 1 in a Vector:
> x = [1,2,3]
> splice!(x, 1:0, 23)
> print(x) # => [23,1,2,3]
>
> But the following behaves strangely and seems to corrupt the array in the
> process:
> a = Vector{UInt8}[UInt8[0xf3,0x32,0x37]]
> splice!(a, 1:0, UInt8[7,3]) # => MethodError: `convert` has no method
> matching convert(::Type{Array{UInt8,1}}, ::UInt8)
> print(a) # => [#undef,#undef,UInt8[0xf3,0x32,0x37]]
>
> Is this a bug, or have I simply not read the docs correctly?
>
> Many thanks,
> George
>
