filtersreduce
Filtersreduce is a conceptual operation used in functional programming and data processing that merges filtering and reduction into one pass over a collection. It filters elements by a predicate and applies a reducing function to accumulate results from the filtered elements.
Formally, given a sequence X, a predicate P, a reducer function F, and an initial accumulator a0,
Implementation can be either two-pass (filter then reduce) or a single-pass streaming approach that evaluates the
Common use cases include analytics pipelines, event stream processing, and log aggregation, where only elements meeting
Related concepts include filter, reduce (fold), map-reduce, and scan. The exact naming and API may vary across