You should be able to use `String.to_atom/1` just fine for your use
case. It will not actually create a new atom if it is already in your
system.
Or am I missing something about your use case?
Justin
On 2018-04-11 12:59, Onorio Catenacci wrote:
Hi all,
I ran across a case where I wanted to try to convert a string to an
existing atom or create a new one if there is no such atom. So I
hacked this together:
defmodule String.Extensions do
def to_existing_or_new_atom(s) when is_binary(s) do
a =
try do
String.to_existing_atom(s)
rescue
ArgumentError -> String.to_atom(s)
end
end
end
I find it hard to believe that I'm the first person to come across
this issue and so I'm inclined to think there's a good reason that
this isn't already part of the string module. I'm guessing that
probably we want to see if we try to convert to an existing atom and
it's not there.
So:
a.) Would this be a welcome PR?
b.) Assuming it wouldn't am I correct in assuming we want the
exception thrown if we try to convert to a non-existent atom? As I say
this seems so obvious I find it very hard to believe I'm the first one
to run across this. I did a quick search but didn't really turn
anything up on this.
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