Type Nothing has no field match

[jling]

@hungpham3112

@show typeof(match(r"[+-]?\d+(\.\d+)?", i).match)

in this line, the .match would throw an error before you can show anything, so I suggest you do this:

m = match(r"[+-]?\d+(\.\d+)?", i)
if isnothing(m)
    @show i
end