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2025-10-20

• 19:13 UTC (new) (history) 2025-10-20 A class register in Org Mode . . . . mbork – My 9-year-old son loves playing school. He’s got a whiteboard, Mom, Sister and Dad are his pupils and he teaches them various real or made-up things. At the beginning he checks attendance, using a long list of made-up pupils’ names. Some time ago he decided that he’d like to keep the attendance data in a digital form. Mom helped him make a MS Word document (I know, I know…), where he puts little minuses for absentees and pluses for the attendees.

2025-10-13

• 05:43 UTC (new) (history) 2025-10-13 Grouping rows by values in a column . . . . mbork – A few days ago I needed to analyze some tabular data where some rows where grouped in a natural way. Imagine for example a database table which stores events, and every event is related to a user. For example, it could have a user_id column, a timestamp column and an event_type column. I want to see all the events, but events related to different users should be visually spearated (as they are completely unrelated). A natural way would be to sort the data by user_id first and by timestamp next. Ideally, groups of events related to different users would be separated by e.g. an empty row.

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