Crystal vs. Haskell vs. Python vs. Wappler Comparison Chart

Every expression in Haskell has a type that is determined at compile time. All the types composed together by function application have to match up. If they don't, the program will be rejected by the compiler. Types become not only a form of guarantee, but a language for expressing the construction of programs. Every function in Haskell is a function in the mathematical sense (i.e., "pure"). Even side-effecting IO operations are but a description of what to do, produced by pure code. There are no statements or instructions, only expressions that cannot mutate variables (local or global) nor access state like time or random numbers. You don't have to explicitly write out every type in a Haskell program. Types will be inferred by unifying every type bidirectionally. However, you can write out types if you choose, or ask the compiler to write them for you for handy documentation.

Low code visual builder for dynamic, data driven and highly interactive custom web sites, CMS systems and mobile apps. No coding required thanks to its integrated, first class reactive front-end and back-end frameworks, visual two way data bindings and Bootstrap 4 builder - you can focus on productivity and creativity. Wappler allows you to connect to any database or API service. With the Docker integration in Wappler you can not only develop locally, but also deploy to any remote Docker host. Full version control is available, thanks to the Git integration.