prblem with space after "ś", "ć" ERROR: UnicodeError: invalid character index

[program...@gmail.com]

What wrong  ?
julia> o=open("string.txt","w")
IOStream(<file string.txt>)

julia> write(o,b)
12

julia> close(o)

julia> o=open("string.txt")
IOStream(<file string.txt>)

julia> temp=readline()

"\r\n"

julia> temp=readline(o)
"sa sdś aa,1"

julia>

julia> temp[6]
'ś'

julia> temp[7]
ERROR: UnicodeError: invalid character index
 in slow_utf8_next(::Array{UInt8,1}, ::UInt8, ::Int64) at .\strings\string.jl:67
 in next at .\strings\string.jl:92 [inlined]
 in getindex(::String, ::Int64) at .\strings\basic.jl:70

julia> temp
"sa sdś aa,1"

julia> eltype(temp)
Char

julia> typeof(temp)
String

julia> temp[3]
' '

Paul

[program...@gmail.com]

Julia ver Version 0.5.0 (2016-09-19 18:14 UTC) 64 bits
File is UTF8 without BOM

[Kristoffer Carlsson]

Please read http://docs.julialang.org/en/release-0.5/manual/strings/

[program...@gmail.com]

[Kristoffer Carlsson]

Specifically,

• Conceptually, a string is a partial function from indices to characters: for some index values, no character value is returned, and instead an exception is thrown. This allows for efficient indexing into strings by the byte index of an encoded representation rather than by a character index, which cannot be implemented both efficiently and simply for variable-width encodings of Unicode strings.

[program...@gmail.com]

Big Thx but how to work with this data ?
Paul

[Ismael Venegas Castelló]

You can use collect(graphemes(s))[3], for example, see also this SO question and it's answers:

http://stackoverflow.com/questions/39501900/truncate-string-in-julia/39505998#39505998

[program...@gmail.com]

Thx, i slower but works:) and next question : ho to find Char in collection ?
julia> str="abc"
"abc"

julia> findin(str,"c")
1-element Array{Int64,1}:
 3

julia>

julia> temp=collect(graphemes(str))
3-element Array{SubString{String},1}:
 "a"
 "b"
 "c"

julia> findin(temp,"c")
0-element Array{Int64,1}

julia> findin(temp,'c')
0-element Array{Int64,1}

julia> find(temp,'c')
ERROR: MethodError: no method matching find(::Array{SubString{String},1}, ::Char)
Closest candidates are:
  find(::Function, ::Any) at array.jl:1082
  find(::Any) at array.jl:1116

[programistawpf]

Ok, I finded: findin(temp,[","])...

for i=1:nol
temp=(collect(graphemes(readline(o))))
poz=(findin(temp,[","])[end])+1
write(io, temp[poz])
write(io, "\n")
if mod(i,10^6)==0 println(i) end
end

But is very slow :/ someting faster ? I have 10^ 8 line of tekst :/

Paul


W dniu 2016-10-20 20:28, program...@gmail.com pisze:

[Kristoffer Carlsson]

What do you actually want to do? Extract all characters after a comma?

[programistawpf]

Between n comma and last comma
Paul
W dniu 2016-10-20 21:45, Kristoffer Carlsson pisze:

[Germán Aquino]

Hello,
I'm not sure if this is what you need, but you could use:

str = "abc"
temp = collect(graphemes(str))
find(temp .== "c")