DelimitedFiles:writedlm usage

General Usage
13

There is no core feature file format in Julia, even though I don’t know what that’s supposed to mean. The Julia devs are no overlords who decide what is and is not supported. The Julia code that you write works exactly like the Julia code in Base or the standard library.

If you want to append something to a csv file, you can either use DelimitedFiles or CSV.jl.
For DelimitedFiles, you could use “a” instead of “w” in open:

using DelimitedFiles

open("delimited_file.csv", "a") do io
    for i in 1:4
        writedlm(io, [i i i], ',')
    end
end
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