Reading file that contains description of twitter emojis - twitter

Question

I'm trying to read a file that contains tweets in each line and convert each character of tweet to an integer. The file can be found here
However, there is something wrong in 28th line in that file. When I look at the file, I see that line is as follows:
Wish she could have told me herself. #NicoleScherzy #nicolescherzinger
#OneLove #myfav #MyQueen :heavy_black_heart:️:heavy_black_heart:️
Furthermore while reading the file, I print out each line when I read it in that case, the line is printed as (Ignore the first two segment for simplification) :
Wish she could have told me herself. #NicoleScherzy #nicolescherzinger #OneLove #myfav #MyQueen :heavy_black_heart:️:heavy_black_heart:️
Now, If I want to print them character by character I got an error. Here is the code for that and the error I got:
x=" Wish she could have told me herself. #NicoleScherzy #nicolescherzinger #OneLove #myfav #MyQueen :heavy_black_heart:️:heavy_black_heart:️"
for i=1:length(x)
println(x[i])
end
.
.
.
INFO: #
INFO: m
INFO: y
INFO: f
INFO: a
INFO: v
INFO:
INFO: #
INFO: M
INFO: y
INFO: Q
INFO: u
INFO: e
INFO: e
INFO: n
INFO:
INFO: :
INFO: h
INFO: e
INFO: a
INFO: v
INFO: y
INFO: _
INFO: b
INFO: l
INFO: a
INFO: c
INFO: k
INFO: _
INFO: h
INFO: e
INFO: a
INFO: r
INFO: t
INFO: :
INFO: ️
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:96 [inlined]
in getindex(::String, ::Int64) at ./strings/basic.jl:70
in macro expansion; at ./REPL[2]:1 [inlined]
in anonymous at ./<missing>:?
What the heck is that ? Why h is represented as h with an bar on top and whey there is a space just before the error mesage, should be there another :

Answer 1

Strings and Unicode are complicated everywhere (because human language is complicated) and in Julia. In addition, the implementation would (and should) probably change in the future. As of v0.5 / v0.6 a way to write the loop in the question is
for c in x
println(c)
end
And to use indexing, something like:
i = 1
while i<=endof(x)
println(x[i])
i = nextind(x,i)
end
In general you should be familiar with endof, nextind to write proper string manipulation in Julia as of v0.5 / v0.6. The REPL help and the documentation should cover them.