alexandrubagu
I run these lines under iex:
iex(62)> Enum.filter([1, 1000], fn(x) -> rem(x, 2) == 0 end)
[1000] #ok
iex(63)> Enum.filter([1, 75], fn(x) -> rem(x, 2) == 0 end)
[] #ok
iex(65)> Enum.filter([1, 2, 3], fn(x) -> rem(x, 2) == 0 end)
[2] #ok
iex(66)> Enum.filter([1, 75], fn(x) -> rem(x, 2) == 0 end)
[] #ok
iex(67)> Enum.filter([1, 1000], fn(x) -> rem(x, 2) == 0 end)
[1000] #ok
iex(68)> Enum.filter([1, 50], fn(x) -> rem(x, 2) == 0 end)
'2' # what ?!
iex(69)> Enum.filter([1, 100], fn(x) -> rem(x, 2) == 0 end)
'd' # what ?!
iex(70)> Enum.filter([1, 80], fn(x) -> rem(x, 2) == 0 end)
'P' what ?!
What’s up this 50, 60,70 .. 100 and so on ? 
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andre1sk
50 ASCII for 2
it thinks it’s a charlist
‘2’ == [50]
michalmuskala
This is a common issue explained best by FAQ · elixir-lang/elixir Wiki · GitHub
There’s also the
i/1helper in iex, that may give you some additional information about any value.alexandrubagu
This a little bit annoying if you don’t set
IEx.configure inspect: [char_lists: false]Thanks for solution