How to Perform Hex Encoding In Elixir?

To perform hex encoding in Elixir, you can use the built-in Base module. The Base.encode16/1 function can be used to encode a binary into a hexadecimal string.

Here is an example of how to perform hex encoding in Elixir:

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binary_data = <<65, 66, 67>>
hex_encoded_data = Base.encode16(binary_data)
IO.puts(hex_encoded_data)

This code snippet will output the hexadecimal representation of the binary data <<65, 66, 67>>, which is equivalent to the ASCII characters "ABC". The output will be 414243.

You can also specify additional options when encoding, such as setting the case to :lower or :upper.

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hex_encoded_data_lower = Base.encode16(binary_data, case: :lower)
IO.puts(hex_encoded_data_lower)

This will output 414243 in lowercase hexadecimal format.

Overall, using the Base module in Elixir makes it simple to perform hex encoding on binary data.

How to perform hex decoding with custom padding in Elixir?

To perform hex decoding with custom padding in Elixir, you can use the Base.decode16!/2 function from the Base module. You can specify the padding character as an option in the decode function.

Here is an example code snippet to perform hex decoding with custom padding in Elixir:

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raw_hex_data = "48656c6c6f20576f726c64"

decoded_data = Base.decode16!(raw_hex_data, padding: ?X)
IO.puts decoded_data

In this example, the raw_hex_data variable contains the hexadecimal data to be decoded. The Base.decode16!/2 function is used to decode the hexadecimal data, and the padding: ?X option specifies that the padding character should be X.

You can then print out the decoded data using IO.puts function.

This code will output the decoded data in UTF-8 format: "Hello World".

Note: The padding character can be specified as any character you prefer, such as ?x, ?0, etc.

How to handle non-hex characters while performing hex encoding in Elixir?

When performing hex encoding in Elixir, it is important to handle non-hex characters properly to ensure that the encoding process is successful. One way to handle non-hex characters is to first convert them to their decimal representation and then encode them as hexadecimal.

Here is an example of how to handle non-hex characters while performing hex encoding in Elixir:

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defmodule HexEncoding do
  def encode_string(string) do
    string
    |> String.graphemes()
    |> Enum.map(&handle_character/1)
    |> List.to_string()
  end
  
  defp handle_character(character) do
    case Integer.parse(character) do
      {:ok, num} ->
        Integer.to_string(num, 16)
      _ ->
        <<character::utf8>> = character
        Integer.to_string(byte_size(character), 16) <> Base.encode16!(character)
    end
  end
end

HexEncoding.encode_string("Hello World!") 
# Output: "48656c6c6f20576f726c6421"

In this example, the handle_character/1 function first attempts to parse the character as an integer. If it successfully parses the character as an integer, it converts the integer to its hexadecimal representation. If parsing the character as an integer fails, it converts the character to its UTF-8 byte representation and encodes it as hexadecimal.

By handling non-hex characters in this way, you can ensure that your hex encoding function works correctly even when encountering characters that are not valid hexadecimal digits.

What is the impact of encoding order on hex encoding in Elixir?

In Elixir, the order in which characters are encoded can impact the resulting hex encoding. Hex encoding is a way of representing binary data as a string of hexadecimal digits.

The impact of encoding order on hex encoding can be seen when encoding a binary data that contains non-printable characters, such as control characters or special characters. The order in which these characters are encoded can affect the readability and interpretation of the resulting hex encoding.

For example, if the encoding order is not consistent, it can lead to different encoding results for the same binary data. This can cause confusion and errors when trying to decode or interpret the hex encoding.

Therefore, it is important to ensure that the encoding order is consistent and follows a standard format when performing hex encoding in Elixir to avoid any discrepancies and maintain the accuracy of the encoded data.

What is the best practice for managing hex-encoded data in Elixir?

The best practice for managing hex-encoded data in Elixir is to use the :crypto module, which is part of the Erlang standard library, for encoding and decoding hex data.

Here is an example of how you can encode and decode hex data using the :crypto module in Elixir:

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# Encode binary data to hex
data = "hello"
hex_data = :crypto.hash(:sha256, data) |> Base.encode16()
IO.puts(hex_data)

# Decode hex data to binary
decoded_data = Base.decode16!(hex_data)
IO.puts(decoded_data)

This approach ensures efficient and secure handling of hex-encoded data in Elixir.