bb:tldr:802dd

This command is a Unix shell pipeline that uses the printf command, followed by the bb command with certain options and arguments.

Let's break it down step by step:

1. printf "first\nsecond": This command is a Unix utility that formats and prints data. In this case, it prints the string "first" followed by a newline character \n, and then the string "second".

2. |: The | character is known as a pipe. It directs the output of the preceding command (printf) as the input to the subsequent command (bb).

3. bb -i "(map clojure.string/capitalize *input*)": The bb command is a command-line tool that evaluates input as Clojure expressions.

• -i options tells bb to read the input as a string.
• (map clojure.string/capitalize *input*): This is a Clojure expression that maps the clojure.string/capitalize function to the input (provided by the previous printf command). The clojure.string/capitalize function capitalizes the first character of a string.

Therefore, the overall command will output the capitalization of the first character of each string passed through printf. In this case, it would produce the output:

First
Second

Note: This command assumes that you have the bb command installed and available in your system.