CODEWITHSUNDEEP
stringtypesjulia
ahm5
ahm5

Reputation: 683

how to get a variable name from a string

I have Dict and all keys in that Dict have their own Types with the same name, so I need to get the Key but not as String, as Type.

toStruct function get two parameters, the first is the Type (in my case is the same as the Key) and the second is the Dict

julia> jsonDict
Dict{String, Any} with 2 entries:   
  "TypeExample1" => Dict{String, Any}("attr"  => 5)
  "TypeExample2" => Dict{String, Any}("attr" => 10)

struct TypeExample1
    attr
end

struct TypeExample2
    attr
end

for (key, value) in jsonDict
   ToStruct.tostruct( Key, key)
end

the code above would not work obviously cause Key is a String the output should be 2 structs (TypeExample1,TypeExample2) with the assigned values

PS: it would work like this:

       ToStruct.tostruct( TypeExample1, jsonDict["TypeExample1"])

but I need to automate this process

Upvotes: 0

Views: 295

Answers (1)

ahnlabb
ahnlabb

Reputation: 2162

The quick and dirty way to achieve this is to use eval.

julia> eval(Symbol("Int"))
Int64

This is of course not limited to types but works for any variable and should not be used on untrusted text.

By using the eval of a specific module (Module.eval) you can evaluate the symbol in that module.

Upvotes: 1

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