tldr/pages/common/bb.md

# bb

> Native Clojure interpreter for scripting.
> More information: <https://book.babashka.org/#usage>.

- Evaluate an expression:

`bb {{[-e|--eval]}} "(+ 1 2 3)"`

- Evaluate a script file:

`bb {{[-f|--file]}} {{path/to/script.clj}}`

- Bind [i]nput to a sequence of lines from `stdin`:

`printf "first\nsecond" | bb -i "(map clojure.string/capitalize *input*)"`

- Bind [I]nput to a sequence of EDN (Extensible Data Notation) values from `stdin`:

`echo "{:key 'val}" | bb -I "(:key (first *input*))"`