Refactoring to a Monad Transformer Stack
Command-line interfaces, or CLIs, often tend to follow a few patterns: they use flags to modify behavior they trigger failures at various points they may read from at least one file Within Haskell, these aspects break down into a few different high-level concepts: configuration, exceptions and exception handling, and I/O. As programs grow, options become unwieldy, manual exception handling muddies
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Organize your functional code
