Julia：1.0更新后有关文件的函数

本文将简要介绍julia1.0发布以后，有关文件的函数介绍
下面的代码为批量产生10个文本文件，并在每个文本文件中写入其文件名的示例代码

using DelimitedFiles

n = 10
filelist = Vector{String}(undef,n)  # 用来存储文件名的字符串数组
for i in 1:n
    filelist[i] = string(i, ".txt")  # 存储文件名
    println( filelist[i] )
end

fileio = [open(filename,"w") for filename in filelist]  # 打开每个文件

for i in 1:length(fileio)
    writedlm( fileio[i], [filelist[i]] )  # 对每个文件写入其文件名
end

map(close, fileio)  # 逐一关掉文件

在julia1.0的REPL中，输入using DelimitedFiles后，再输入?，接着输入writecsv，结果如下：
help?> writecsv
search:

Couldn't find writecsv
Perhaps you meant writedlm, write or withenv
  No documentation found.

  Binding writecsv does not exist.
看起来julia1.0已将writecsv函数废弃了。

输入writedlm,结果如下：
help?> writedlm
search: writedlm

  writedlm(f, A, delim='\t'; opts)

  Write A (a vector, matrix, or an iterable collection of iterable rows) as
  text to f (either a filename string or an IO stream) using the given
  delimiter delim (which defaults to tab, but can be any printable Julia
  object, typically a Char or AbstractString).

  For example, two vectors x and y of the same length can be written as two
  columns of tab-delimited text to f by either writedlm(f, [x y]) or by
  writedlm(f, zip(x, y)).

  Examples
  ≡≡≡≡≡≡≡≡≡≡

  julia> using DelimitedFiles

  julia> x = [1; 2; 3; 4];

  julia> y = [5; 6; 7; 8];

  julia> open("delim_file.txt", "w") do io
             writedlm(io, [x y])
         end

  julia> readdlm("delim_file.txt", '\t', Int, '\n')
  4×2 Array{Int64,2}:
   1  5
   2  6
   3  7
   4  8

  julia> rm("delim_file.txt")

综上就是julia1.0关于文件处理这一块的变化。当然上述只是一小部分，后面有机会会持续更新这一博文！