> most unix tools (ls being the exception) do double duty, they both emit output for other programs and output for the user. Which one you get and how the user output is presented being controlled by flags.
Which is where they fundamentally break the principle of "doing one thing, and doing it well". Formatting output for user should be a separate step (even if implicitly handled by your shell).
Which is where they fundamentally break the principle of "doing one thing, and doing it well". Formatting output for user should be a separate step (even if implicitly handled by your shell).