Get a specific value from a proplist

Question

I have a proplist like this:

{ok,{todo,"todo-21","Foo2"}}

How can I get the without the "ok"?

I would like to output this as json in my controller:

{json, {todo,"todo-21","Foo2"}}

Is there some nifty way to do this?

Pedantic note: this isn't a proplist, because a proplist is necessarily a list. — Alexey Romanov, Oct 24 '11 at 15:31

score 2 · Answer 1 · edited Mar 04 '13 at 14:59

2

Pretty simple, I would say:

tojson({ok,Todo}) -> {json, Todo}.
tojson({ok,{todo,"todo-21","Foo2"}}).

edited Mar 04 '13 at 14:59

answered Oct 24 '11 at 12:56

Alin

3

Or match out the `ok` when it is generated, for example `{ok,Todo} = ...`. – rvirding Oct 24 '11 at 14:19
That was my initial suggestion also, but I considered somehow a bit more complicated (I don't know why though). – Alin Oct 24 '11 at 14:24
Question: Is the way I solved it possible, too? Or is that considered bad practice? If yes, why? – Sebastian Hoitz Oct 25 '11 at 09:00

score 0 · Answer 2 · answered Oct 25 '11 at 09:00

0

This is what I did:

element(2, {ok, {todo, "todo-21", "Foo2"}}).

answered Oct 25 '11 at 09:00

Sebastian Hoitz

2 Answers2