thank you Jose.
`binding()[:a]` is the way to go.
iex> a = 1
...> binding()[:a]
1
Just for the record of anybody in the list or Googling this, to achieve this
with macros one can do:
iex> a = 1
...> quote(do: var!(unquote(Macro.var(:a, nil)))) |> Code.eval_quoted(binding)
|> elem(0)
1
or simply
...> quote(do: var!(unquote({:a, [], nil}))) |> Code.eval_quoted(binding) |>
elem(0)
1
if anybody else knows a simpler way, please let me know.
On Thu, 14 Jul 2016 18:02:34 +0200
José Valim <[email protected]> wrote:
> You need to pass your binding to eval quoted, see Kernel.binding/0.
> That will return all variables up to some point. However, you will
> also see binding is a keyword list, so you can simply get the
> variable value directly from it.
>
>
>
> *José Valim*
> www.plataformatec.com.br
> Skype: jv.ptec
> Founder and Director of R&D
>
> On Thu, Jul 14, 2016 at 5:31 PM, eksperimental
> <[email protected]> wrote:
>
> > Hello list:
> >
> > I'm trying to access variables via a list of atoms,
> >
> > So given:
> > iex> a = 1
> > ...> b = 2
> > ...> c = 3
> > ...> vars = [:a, :b, :c]
> >
> > I would like to print the value in each variable
> > ...> for var <- vars, do: IO.inspect(var)
> >
> > How can I achieve this
> >
> > I have tried this to no avail
> >
> > iex> quote(do: var!(a)) |> Code.eval_quoted
> > ** (CompileError) nofile:1: expected variable "a" to expand to an
> > existing variable or be part of a match (elixir) expanding macro:
> > Kernel.var!/1 nofile:1: (file)
> >
> >
> > thank you.
> >
> > --
> > You received this message because you are subscribed to the Google
> > Groups "elixir-lang-talk" group.
> > To unsubscribe from this group and stop receiving emails from it,
> > send an email to [email protected].
> > To view this discussion on the web visit
> > https://groups.google.com/d/msgid/elixir-lang-talk/20160714223146.3fc22245.eksperimental%40autistici.org
> > .
> > For more options, visit https://groups.google.com/d/optout.
> >
>
--
You received this message because you are subscribed to the Google Groups
"elixir-lang-talk" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/elixir-lang-talk/20160715043401.21fdef47.eksperimental%40autistici.org.
For more options, visit https://groups.google.com/d/optout.
