在 Julia 中将程序的文档字符串打印到标准输出

Question

Julia 接受?sin命令行以显示帮助文本。我相信这样的帮助文本是作为文档字符串实现的。我想在运行时从我的 Julia 程序打印这样的文档字符串。怎么做？

Answer 1

julia> @doc sin\n  sin(x)\n\n  Compute sine of x, where x is in radians.\n\n  sin(A::AbstractMatrix)\n\n  Compute the matrix sine of a square matrix A.\n\n  If A is symmetric or Hermitian, its eigendecomposition (eigen) is used to compute the\n  sine. Otherwise, the sine is determined by calling exp.\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> sin(fill(1.0, (2,2)))\n  2\xc3\x972 Matrix{Float64}:\n   0.454649  0.454649\n   0.454649  0.454649\n

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