Hi, Jacob
Thanks for the reply, and the way you showed to use "enumerate()" is really
nice to know of, and it has eventually given me a great insight to deal
with the case.
What I was trying to do was to read data from csv file, and getting a list
of array (array of array) out of it.
Here are what I wanted to do, and how I have got it done in the following
way; let me share what I'd like to do more specifically here:
This is a csv file named "test.csv"
aaa, john, 100
bbb, mike, 200
ccc, steve,300
ddd, mary, 400
Then here goes the code, "samp.jl"
f = open("./test.csv")
res = Array{Any}[] ## I found this is the key!!!
for line in eachline(f)
val = split(strip(line), ",")
push!(res, val)
end
print("--------BEFORE---------\n")
print(res)
## code from Jacob here !
for elm in res
for (i, v) in enumerate(elm)
parsed = tryparse(Int, v)
elm[i] = isnull(parsed) ? v : get(parsed)
end
end
print("\n")
print("--------AFTER---------\n")
print(res)
close(f)
Then, results are as follows.
julia> include("samp.il")
--------BEFORE---------
Array{Any,N}[Any["aaa"," john"," 100"],Any["bbb"," mike","
200"],Any["ccc"," steve","300"],Any["ddd"
," mary"," 400"],Any[""]]
--------AFTER---------
Array{Any,N}[Any["aaa"," john",100],Any["bbb"," mike",200],Any["ccc","
steve",300],Any["ddd"," mary"
,400],Any[""]]
julia>
It turns out that you have to declare an array variable to store the
results with Array{Any}[] in advance,
otherwise, (meaning in such a case as you declare "res = []" without type
being clarified), you'd eventually have an array with Array{String}[], and
you cannot convert ASCIIString represented numeric values into Int due to
type mismatch.
Anyway, thanks for your help!!
Best regards
Masa
On Tuesday, October 13, 2015 at 2:46:18 AM UTC+9, Jacob Quinn wrote:
>
> I'd probably do something like:
>
> julia> x = Any["abc", "10"]
> 2-element Array{Any,1}:
> "abc"
> "10"
>
> julia> for (i,v) in enumerate(x)
> parsed = tryparse(Int,v)
> x[i] = isnull(parsed) ? v : get(parsed)
> end
>
> julia> x
> 2-element Array{Any,1}:
> "abc"
> 10
>
>
> On Mon, Oct 12, 2015 at 8:31 AM, masa charlie <[email protected]
> <javascript:>> wrote:
>
>> I have a question:
>> I want to know the way to convert a ASCIIString represented number in an
>> Array{ASCIIString, 1} into Int, and put it back into the original list as
>> Array{Any, 1} in Julia.
>>
>> For example:
>>
>> When I have a array variable x as follows;
>>
>> julia> x = ["abc", "10"]
>> 2-element Array{ASCIIString,1}:
>> "abc"
>> "10"
>>
>> and I want to get it converted as the following.
>>
>> julia> y = ["abc", 10 ]
>> 2-element Array{Any,1}:
>> "abc"
>> 10
>>
>> Then, if I've tried applying parse function and putting it back to the
>> original Array, I ended up getting an error below.
>>
>> x[2] = parse(Int, x[2])
>> ERROR: MethodError: `parse` has no method matching parse(::Type{Int64},
>> ::Int64)
>> Closest candidates are:
>> parse{T<:Integer}(::Type{T<:Integer}, !Matched::Char)
>> parse{T<:Integer}(::Type{T<:Integer}, !Matched::Char, !Matched::Integer)
>> parse{T<:Integer}(::Type{T<:Integer}, !Matched::AbstractString,
>> !Matched::Integer)
>> ...
>> in convert at none:1
>> in setindex! at array.jl:313
>>
>> Can any one have a suggestion on the way to get an expected result?
>>
>>
>> Thanks in advance!!!
>>
>> Masa
>>
>>
>>
>>
>
