CODEWITHSUNDEEP
erlangelixir
dbryson
dbryson

Reputation: 6127

Elixir calling :io_lib.fread

How do you properly get a character list into Erlang from Elixir?

Suppose I do this is Erlang:

12> [X,Y | R] = "54686973206973206120746573742e".
"54686973206973206120746573742e"

13> X.
53

14> Y.
52

15> io_lib:fread("~16u",[53,52]).                
{ok,"T",[]}

How do make that call correctly from Elixir?

:io_lib.fread("~16u",...)

I have already seen this question: Elixir io_lib call to erlang

But I still seem to get a FunctionClauseError no matter what approach I take to push the list into fread.

Upvotes: 2

Views: 216

Answers (1)

legoscia
legoscia

Reputation: 41568

Using single quotes around the format string as described in the linked question seems to work:

iex(1)> :io_lib.fread('~16u', [53,52])
{:ok, 'T', []}

Upvotes: 2

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