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Bingex - library for BingX API.

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bingex lib bingex helpers.ex
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lib/bingex/helpers.ex 

defmodule Bingex.Helpers do

  @moduledoc false



  def reject_nils(enum) do

    Enum.reject(enum, fn

      {_key, nil} -> true

      nil -> true

      _ -> false

    end)

  end



  def timestamp, do: :os.system_time(:millisecond)



  def get_and_transform(data, key, default \\ nil, processor)

      when is_function(processor, 1) do

    case Map.fetch(data, key) do

      {:ok, x} -> processor.(x)

      :error -> default

    end

  end



  def downcase(nil), do: ""

  def downcase(x), do: String.downcase(x)



  def upcase(nil), do: ""

  def upcase(x), do: String.upcase(x)



  def serialize(x) when is_list(x) do

    content = Enum.map_join(x, ",", &serialize/1)

    "[" <> content <> "]"

  end



  def serialize(%{} = x), do: JSON.encode!(x)



  def serialize(x), do: Kernel.to_string(x)

end