When comparing Boo vs V, the Slant community recommends V for most people. In the question“What are the best languages to learn for someone coming from Python?” V is ranked 8th while Boo is ranked 14th. The most important reason people chose V is:
Compile app to run on different OSes.
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Pros
Pro IDE support
The open-source #develop comes with Boo support.
Pro Static type safety
This also improves performance as compared to IronPython. You can still use duck typing if you want, but you mostly don't need to since Boo can infer the type based on context.
Pro Inter-operates with other .NET languages
Boo runs on the .NET platform, so you can pretty much use it for anything C# is good for.
Pro One of Unity's supported languages
Use your Python skills to make games.
Pro Familiar syntax
Boo's syntax was heavily influenced by Python's, but makes some improvements like macros and multi-line lambdas.
Pro Cross-platform
Compile app to run on different OSes.
Pro Sum types
V has sum types.
Pro GUI support
V comes with (simple) GUI support out of the box.
Pro Clear syntax
Highly understandable language.
Pro Safety
V is very safe.
Pro Fast like C
V is easier than C and fast like C.
Pro Closures
V has closures, which gives the user additional options and usefulness.
Pro Generics
V has generics.
Pro Supports concurrency and channels
Can run functions concurrently that communicate over channels.
Pro C Interop
Can import C libraries, structs, and headers.
Pro Fast compile times
Compiles programs fast, less waiting around, so more productive and fun.
Pro Lambdas
Supports using lambdas, which helps write more concise code without having to use so many lines.
Cons
Con The documentation isn't as good as Python's
There are some Boo textbooks. You can also find examples of Boo's language features in the Git repository, but it doesn't seem to have a thorough description of the language itself like Python does.