A simple Unix tool to describe a list of numbers (typically, if it is too long for visual inspection), like the output of one or more seq commands, by a set of rules, similar to what the seq commands would take to regenerate the same list.

Documentation to be completed (as of November 2023).

The option SEP="" generates a compact output format (without spaces).

The make tests command yields an illustrative list of examples for usage.

Not-number lines are ignored, but printed out.

Works on a list of numbers given line by line. Use other tools to cut your lines, if you have a multi-number lines type of input.

This tool can by installed standalone in any directory, which is part of the $PATH variable, e.g. ~/.local/bin/, ~/bin, /usr/local/bin, /usr/bin, …. A cleaner, more standard way should be provided in the future.

Only prerequisite is the installation of awk.

As sequences of numbers can be generated

I would be glad to hear from you about missing cases. Create a new issue on github for that, including providing patches (pull requests).