#running-total Clear
Tags #php #kotlin #bash #go #sql #rust #typescript #html #java #python #files #utils #strings #http #concurrency #async #json #arrays #security #types #crypto #database #dates #format
Kotlin fold and scan
`fold` accumulates from a seed across all items. `runningFold` / `scan` yields every intermediate accumulator value — running totals, cumulative metrics.
SQL Running Totals (SUM OVER)
Window aggregates with an implicit "rows up to here" frame give you running totals, cumulative counts, and ratchet-up metrics. No self-join needed.