"Weird" behivor with list

[sabo66]

I don’t understand why I get '\a\b\t' rather than [7,8,9] ?

iex(1)> list = [ [1,2,3], [4,5,6], [7,8,9] ]
[[1, 2, 3], [4, 5, 6], '\a\b\t']

[regex.sh]

This might help you

Binaries, strings, and charlists

And if that doesn’t help here is SO answer

Elixir lists interpreted as char lists

[sabo66]

Thank you I will take a look

[stefanluptak]

Elixir Gotchas and Common Issues Wiki

Preamble This Wiki is intended to be a community-maintained (see the Contribution Guidelines if interested) resource of common “gotchas” (unexpected issues) that beginners to Elixir might experience. The main intended audience is programmers used to other languages, who come to Elixir and find themselves confused by some particularities of the language and its ecosystem. We also hope it can be used by experienced Elixir programmers as a tool for answering questions and guiding beginners - a qu…

[dimitarvp]

They are the same, iex is just trying to be helpful by formatting it as a printable string.