Crystal vs. Haskell vs. Python vs. openIndiana 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.

OpenIndiana is an operating system from and for the illumos community, it branches from the UNIX-derived family tree, and as such it can sometimes seem quite complex. But with a little help and information, once you know the basics, you will find it actually has some of the nicest and friendliest tools around. As most Unix-derived operating system, it can be completely controlled via a Command Line Interface shell, but it also supports a windowing GUI system. From the CLI, it supports a number of different shells, the two main ones being ksh93 and Bash. It also supports the original SunOS SVR4 commands, the command and syntax famiilar to BSD users, and a large portion of the GNU userland commands that most Linux users are familiar with. You can select any or all of those different commands from your shell configuration, giving you the environment you are most happy with.