Raku Land




_ (pronounced "lowbar") is a meta utility package for the Raku programming language. Being meta means that _ is comprised of independent sub-packages, each with their own documentation and tests. Being a utility package means that each of _'s sub-packages is provides some helper functionality — the type of functionality that, if it weren't in _, might live in a ./utils directory or in a tiny module that would bloat your dependency tree.

_'s goal is to provide you with utilities that are correct by inspection: that is, with code so simple that you can look at it and tell that it is correct. To achieve this goal, each _ sub-package will always be:

  1. A single file (not counting tests/docs)
  2. With zero dependencies (not counting other _ files or core modules)
  3. That's no more than 70 lines long

This means that you or any other Raku programmer can evaluate any _ sub-package by opening a single file and reading a page of code. If you have questions or concerns about any _ sub-packages, I encourage you to do just that.

However, just because you can doesn't mean that you must: each _ sub-package is also documented in the accompanying README file located in its directory. Similarly, as valuable as "proof by inspection" my be, it's no substitute for tests. (Recall Knuth's warning to a colleague: "Beware of bugs in the above code; I have only proved it correct, not tried it.**). Accordingly, each sub-package also has its own tests.

NOTE: Once _ has a production release, it will guarantee backwards compatibility. However, _ is currently beta software and does not promise backwards compatibility.

For more information about _'s goals and plans, please see the announcement blog post.


Install _ with $ zef install _:auth<github:codesections>.


To use _, you can import all of _'s exported functions with use _. This style of importing is intended for prototyping/experimentation when you are not which _ functions you may use.

Alternatively, you can selectively import exported functions (or other symbols) by passing their name to the use _ statement. For example, here's how you could import the &dbg function from the Print::Dbg sub-package and the &wrap-words function from the Text::Wrap sub-package:

use _ <&dbg &wrap-words>;

This style of imports is intended for later in the development process/when you want to ensure that _ does not cause unexpected name clashes.


_ includes the following sub-packages. You can find more information about each one in the README file in its directory.


You would be welcome to contribute to _'s development; you can help in any of the following ways:

(For the last two, it'd probably be a good idea to mention your idea in an issue first; that's not a requirement, but it might prevent you spending time of a feature that isn't a great fit for _).

All _ contributors agree to abide by the Raku Code of Conduct.


My initial goal for _ is to get it to a 1.0.0/stable release as soon as possible in order to provide guarantees regarding backwards compatibility. To that end, my priority is to decide what _'s overall approach to versioning will be and to implement that system. The announcement blog post has additional details about the versioning considerations.

Once _ has a stable release, the plan is to focus on growing _ to address other needs in the Raku ecosystem.