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fpdart
Functional programming in Dart and Flutter. All the main functional programming types and patterns fully documented, tested, and with examples.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You should check out the fpdart package. The maintainer is an interesting guy, and posts a lot of practical examples. This post about validation and TaskEither that also happens to speak to your question about map() vs flatMap().
See: https://github.com/dart-lang/language/issues/2025
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