ENB: c.interactive and the new summary command

[Edward K. Ream]

This Engineering Notebook post reminds Leonistas that you can easily create interactive commands using the c.interactive helpers. CheatSheet.leo mentions these helpers, but a more detailed discussion is timely.

#3649 suggests creating an interactive summary command. The command prompts the user for a regex and returns a sorted list of all unique matches. I discovered the need for this command while studying the code for Ruff Format.

The first comment of #3649 contains prototype code for the summarize command. The script prompts the user for a regular expression and then creates a top-level node containing the summary.

Summary

The summary command is more concise than the find-all and cff commands. I use summaries to suggest further cffs.

Leonistas can easily create similar commands using c.interactive1, c.interactive2, and c.interactive3.

Edward