In general, local scopes are not first-class in Julia. When you call eval,
the code is executed in the current module's global scope and similarly,
isdefined tells you whether a variable is defined in the current module's
global scope.
On Sun, Feb 9, 2014 at 5:34 PM, Bill Janssen <bill.jans...@gmail.com> wrote:
> I'm still struggling with understanding Julia's scopes. Are they
> consistent? Why does the following happen? I'd expect "y" to be lexically
> bound by the let. This is version 0.2.
>
> julia> let y = 4; eval(symbol("y")); end
> ERROR: y not defined
>
> In addition, one can refer to certain scopes (modules, types) with
> functions such as isdefined(), but not to others (let scopes, for
> instance). Why is that?
>
>
