How To count semi-colon delimited Thunderbird Support Forum tags for Thunderbird Desktop using 'mlr' aka 'miller': use '--explode' with the 'nest verb' to make 1 row per tag and then count the rows with non null tags
Discovered: Feb 18, 2026 05:22 (UTC) How To count semi-colon delimited Thunderbird Support Forum tags for Thunderbird Desktop using ‘mlr’ aka ‘miller’: use ‘–explode’ with the ‘nest verb’ to make 1 row per tag and then count the rows with non null tags
mlr --csv nest --explode --values --across-records --nested-fs ";" -f tags\
then filter -x 'is_null($tags)'\
then count-distinct -f tags\
then sort -nr count 2025-12-thunderbird-questions.csv \
> 2025-12-thunderbird_questions_tags.csv
The output is: CONCATENATED_FILES/2025-12-thunderbird_questions_tags.csv