Difference between String[] and Vector{String}[] in Julia

user_18354481 0
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I have the following code:

x = String[]
y = Vector{String}[]

x == y  # is true

push!(x, "a")  # works fine
push!(y, "a")  # ERROR

The error message is:

ERROR: MethodError: Cannot `convert` an object of type String to an object of type Vector{String}

What is the difference between String[] and Vector{String}[]? Aren't they both vectors of strings?

julia
1 Answers

T[] where T is a type generates a zero-length vector with elements of type T. So your y is a vector of Vector{String}s. Therefore if you try to push Strings to it you get an error. Try pushing a vector of Strings.

user_112423470
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