Compared to Hugs, GHC is more suited to “ real work ”: it compiles to native code, supports parallel execution, and provides useful performance analysis and debugging tools.

Fixing type errors may initially feel like more work than if you were using a dynamic language. It might help to look at this as moving much of your debugging up front. The compiler shows you …

That being said, Haskell is a rigorous language: it will make you perform more of your thinking up front. It can take a little while to adjust to debugging much of your code before you ever run it, …

Whether with concurrency or memory management, there will be times when we must retain control: some software must make solid guarantees about latency or memory footprint, so we …

We would like to produce output that is suitable either for human consumption (e.g. for debugging) or for machine processing. Libraries that perform this job are referred to as pretty printers. …

The answer is slightly shameful, and has to do with interactive debugging in ghci. When we tell GHC to automatically derive a Show instance for a type, it produces different code depending …