I can parse(Int, „123“) but I cannot find a simple way to parse(Vector{Int}, „[1, 2, 3]”). Is there a “canned” solution?

As a simple solution in the past I’ve used: @assert str[1] == '[' && str[end] == ']' CSV.read(IOBuffer(str[2:prevind(str, end)]), header=false, transpose=true)

Thank you - I was looking as CSC but didn’t see this trick.

For curiosity, if I am given a strIng as Inshowed then how do Inconvert it into an array of strings?

Sorry for misunderstanding earlier. Here’s something you can do if you really have to work with the string "[1, 2, 3]" x = "[1, 2, 3]" rr = r"([0-9])" # you can alter this to work with numbers with decimal places matches = [parse(Int64,t.match) for t in eachmatch(rr, x)] > 3-element Array{Int64,1}…

Very interesting, thank you. I’ll need to spend some time understanding this :slight_smile:

Another workaround is to make it a full expression vec = "[1, 2, 3]" y = "y = " t = y * vec out = eval(parse(t))

Definitely don’t do that. Using eval — and especially eval(parse(…)) — is a major red flag. It doesn’t work the way you expect within functions and it is prone to security issues and surprising bugs.

Hi! I’m a bit of a metaprogramming noob but I’d like to understand a bit better why parsing a string that looks like the definition of a vector could be a bad idea. If you can point me to some relevant documentation I’d be very happy :slight_smile:

Thanks a lot! Your comment and many other valid points in the thread were quite useful.

The bigger problem than Meta.parse is eval: [image] mbauman: It doesn’t work the way you expect within functions Julia’s eval only works at global scope. If you do something like eval(parse("y = [1,2,3]")), it’ll create a global y that’s separate from any local ys you might have inside your…

Parse vector from string

General Usage

stevengj March 7, 2022, 2:26pm 14

See this thread: How to warn new users away from metaprogramming, e.g. my comment on avoiding misuse of metaprogramming: How to warn new users away from metaprogramming - #22 by stevengj

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Parse vector from string

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