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elixirets

String Manipulation: join with comma

How can I get below string as result from the way i am getting it right now in elixir.

['x1', 'x2']

I tried with enum.join but did not get the desired data

to

'x1,x2'
Solution

  • If I understand correctly, you should use Enum.join/2 with the second parameter to define the "joiner". this should work:

    arr = ['x1', 'x2']
Enum.join(arr, ",")
# => "x1,x2"

    If you want the result to be char list, you can turn it to one using String.to_char_list/1:

    String.to_char_list(Enum.join(arr, ","))
# => 'x1,x2'

    Another option is to use Enum.reduce/2 and add the joiner explicitly:

    Enum.reduce(arr, &(&2 ++ ',' ++ &1))               
# => 'x1,x2'