是否有将 REPL 内容打印到 Julia 语言文件的功能？

Question

我已经在 REPL 中输出了一些内容。是否有任何功能可以将所有这些内容打印到文件中？

Answer 1

如果这些输出已经在 REPL 中打印，我想将它们保存到文件的唯一方法是手动复制粘贴。但是如果您想保存 REPL 输出历史记录以供将来使用，一种方法是重载display：

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shell> touch repl_history.txt\n\njulia> using REPL\n\njulia> function REPL.display(d::REPL.REPLDisplay, mime::MIME"text/plain", x)\n           io = REPL.outstream(d.repl)\n           get(io, :color, false) && write(io, REPL.answer_color(d.repl))\n           if isdefined(d.repl, :options) && isdefined(d.repl.options, :iocontext)\n               # this can override the :limit property set initially\n               io = foldl(IOContext, d.repl.options.iocontext,\n                          init=IOContext(io, :limit => true, :module => Main))\n           end\n           show(io, mime, x)\n           println(io)\n           open("repl_history.txt", "a") do f\n              show(f, mime, x)\n              println(f)\n           end\n           nothing\n       end\n

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然后，让我们在 REPL 中随机打印一些内容：

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julia> rand(10)\n10-element Array{Float64,1}:\n 0.37537591915616497\n 0.9478991508737484 \n 0.32628512501942475\n 0.8888960925262224 \n 0.9967927432272801 \n 0.4910769590205608 \n 0.7624517049991089 \n 0.26310423494973545\n 0.5117608425961135 \n 0.0762255311602309 \n\nhelp?> gcd\nsearch: gcd gcdx significand\n\n  gcd(x,y)\n\n  Greatest common (positive) divisor (or zero if x and y are both zero).\n\n  Examples\n  \xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\n\n  julia> gcd(6,9)\n  3\n\n  julia> gcd(6,-9)\n  3\n

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文件内容如下：

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shell> cat repl_history.txt\n10-element Array{Float64,1}:\n 0.37537591915616497\n 0.9478991508737484 \n 0.32628512501942475\n 0.8888960925262224 \n 0.9967927432272801 \n 0.4910769590205608 \n 0.7624517049991089 \n 0.26310423494973545\n 0.5117608425961135 \n 0.0762255311602309 \n  gcd(x,y)\n\n  Greatest common (positive) divisor (or zero if x and y are both zero).\n\n  Examples\n  \xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\xe2\x89\xa1\n\n  julia> gcd(6,9)\n  3\n\n  julia> gcd(6,-9)\n  3\n

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如果不需要交互地使用 REPL，只需使用julia script.jl > output.txt也可以达到目的。

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