I just came across this surprising (to me) behaviour, that a single character is not considered as a scalar:
julia> myfun(a) = a
myfun (generic function with 1 method)
julia> myfun.(1)
1
julia> myfun.('a')
1-element Array{Char,1}:
'a'
I would had expected that the last line just return a single ‘a’ and not [‘a’]. Is there a particular reason for the current behaviour ? I use julia 1.0.1.
I would say that the following method is missing for Char:
Base.IteratorSize(::Type{Char}) = Base.HasShape{0}()
With this definition all works OK (and Char is treated as 0-dimensional array).
What about iterating over a single characters codepoints?
length of Char is defined as 1.
AFAIK to do this you currently have to write:
julia> codeunits(string('∀'))
3-element Base.CodeUnits{UInt8,String}:
0xe2
0x88
0x80
or directly access bytes via:
julia> reinterpret(UInt32, '∀')
0xe2888000
Ah, yes of course!
What is the difference between myfun.('a') and myfun('a')?
myfun('a') just returns 'a’ as expected.
Thank you for your insights. Would you consider it as a bug? I am considering to file an issue.
Perfect! Thanks, Bogumił!