I wanted to check elixir version in phoenix because i found that my elixir is 1.5 but when i use Enum.chunk_by it said the function is undefined it only work with Enum.chunk

Thats not exactly related to phoenix. You can get the version of the installed elixir from the shell using elixir --version, or programmatically using System.version/0 : iex(1)> System.version "1.5.0"

Thank you after restarted the server it magically work maybe there was a typo. sorry was very new to this

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How to check Elixir version

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NobbZ August 16, 2017, 10:01am 3

Also I went back until v1.1, there is a Enum.chunk_by/2 since at least that version.