Prepend

This project is mostly for learning purposes.

prepend prepends one or more command line arguments given to it to each line from stdin and writes that to stdout.

Install

• Make sure you have Elixir installed. On a Mac that is as quick as brew install elixir
• Run mix deps.get and mix escript.build or combine them as mix do deps.get, escript.build

Usage

Use the compiled binary:

$ echo -e "ice cream\npizza\ncats" | ./prepend "I like "
I like ice cream
I like pizza
I like cats

Or from within the repo, run prepend directly via mix:

$ echo -e "ice cream\npizza\ncats" | mix prepend "I like "
I like ice cream
I like pizza
I like cats

Development

• Start mix test.watch and develop TDD
• Or run the tests only once with mix test
• Property tests can be run with mix test --only property
• To give the code a try in the REPL use iex -S mix. Try this:

["one", "two"] |> Prepend.stream_lines("$ ") |> Enum.to_list

• Format code using mix format
• Lint code using mix credo and mix dialyzer

License

MIT