How to Pass Data From Terminal In Elixir?

To pass data from the terminal in Elixir, you can use command line arguments or read input from the standard input stream. Command line arguments can be accessed using the System.argv/1 function, which returns a list of strings representing the arguments passed to the script.

Alternatively, you can read input from the standard input stream using functions like IO.gets/1 or IO.read/1. These functions will interact with the user in the terminal and allow you to read data that the user types in.

Overall, passing data from the terminal in Elixir involves using command line arguments or reading input from the standard input stream, depending on your specific requirements.

How to convert user input to different data types when passing from terminal in Elixir?

In Elixir, you can convert user input to different data types by explicitly converting the input using type conversion functions such as String.to_integer/1, String.to_float/1, String.to_existing_atom/1, etc. Here's an example of converting user input to an integer:

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# Read user input from the terminal
IO.puts "Enter a number:"
input = IO.gets("")

# Convert input to an integer
number = String.to_integer(input)

# Use the converted integer
IO.puts "The number entered is #{number}"

Similarly, you can convert user input to other data types by using the corresponding conversion functions. Remember to handle potential errors that may occur during the conversion process, such as providing default values or appropriate error messages.

What is the role of String.trim function when passing data from terminal in Elixir?

The String.trim function in Elixir is used to remove leading and trailing white space from a string. When passing data from the terminal in Elixir, using String.trim can be helpful to sanitize the input before further processing or validation. This can help prevent unexpected errors or behavior that may occur due to extra white space in the input data. By trimming the input string, you can ensure that it is clean and consistent before using it in your application logic.

How to pass binary data from terminal in Elixir?

To pass binary data from the terminal in Elixir, you can use the Base module to encode the binary data as base64 and then decode it back into binary data in your Elixir code. Here's an example of how you can do this:

1. Encode the binary data as base64 in the terminal:

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$ echo -n "Hello, world!" | base64

1. Copy the base64 encoded output.
2. In your Elixir code, you can decode the base64 encoded data back into binary data like this:

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base64_data = "SGVsbG8sIHdvcmxkIQ=="
binary_data = Base.decode64!(base64_data)

IO.puts(binary_data)

This will output the original binary data that was encoded in the terminal. You can then use this binary data as needed in your Elixir code.

What is the procedure for serializing and deserializing data when passing from terminal in Elixir?

Serializing and deserializing data can be achieved using the :erlang.term_to_binary/1 and :erlang.binary_to_term/1 functions in Elixir. Here is an example of how to serialize and deserialize data when passing from the terminal:

1. Serialize data:

You can serialize any Elixir term or data structure into a binary format using :erlang.term_to_binary/1 function. For example, if you have a list of numbers [1, 2, 3], you can serialize it like this:

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data = [1, 2, 3]
serialized_data = :erlang.term_to_binary(data)
IO.inspect(serialized_data)

1. Deserialize data:

Once the data is serialized, you can pass it to another process or save it to a file. To deserialize the data back into its original form, you can use :erlang.binary_to_term/1 function. For example:

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deserialized_data = :erlang.binary_to_term(serialized_data)
IO.inspect(deserialized_data)

This will convert the serialized binary data back into the original Elixir term [1, 2, 3].

By following these steps, you can easily serialize and deserialize data when passing from the terminal in Elixir.