JuliaREPL中仅允许有限输出的选项是什么？
结果变量是一个json类型的字符串，很长。当变量这么长时，Julia REPL 中有什么选项只允许有限的输出？DataFrame 最初只是部分输出。我希望通用变量也能这样输出。
回答
您可以覆盖s的display方法AbstractString：
import Main.display
display(x::AbstractString) =
show(length(x)<=50 ? x : SubString(x,1,50)*"…")
让我们测试一下：
julia> str = join(rand('a':'z', 200))
"wcbifwzglgqyenrcdgdxagohlwdoxrrumoaltklkjauptwzrmi…"
- I've opened an issue to discuss doing this out of the box: https://github.com/JuliaLang/julia/issues/40724. The implementation there also avoids being O(ncodeunits(str)), which is important for *really* long strings.
- Put it into Julia startup file! Here is how: https://stackoverflow.com/questions/52175314/where-is-juliarc-the-julia-startup-file/52175490#52175490