Map.values returns '\f' when it shouldn't

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1

Hi All!

I’ve met something easily reproductible and weird.
Bellow, you can see the versions of elixir and erlang I’m using as well as the lines I executed on iex:

Erlang/OTP 24 [erts-12.1.4] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [jit]

Interactive Elixir (1.13.0-rc.0) - press Ctrl+C to exit (type h() ENTER for help)

iex(1)> Map.values(%{a: 1})

[1]

iex(2)> Map.values(%{a: 12})

'\f'

I was expecting this return value [12].

Please tell me if you encounter the same results, if you know the reason behind this?
I suspect a bug but I’m just hoping for some anomaly in my thinking or setup :slightly_smiling_face:

Thanks! :smiley:

2

This is normal. See Binaries, strings, and charlists - The Elixir programming language for an explanation. Tl;Dr is that in erlang strings are lists of numbers, and elixir has a syntax for that as well to promote compatibility with Erlang.

Edit: also want to point out, you do have a list of numbers there, it’s just printed differently. Eg
'\f' == [12]

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3

Thanks a lot! So it was an anomaly in my thinking :laughing:

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