About the Playground

Fo is a new language which compiles to Go and adds some functional programming features. The name is short for "Functional Go". You can find the full source code, examples, issues, and more on GitHub

The Fo Playground is based on The Go Playground and works similarly. The service receives a Fo program, transpiles it to Go, compiles, links, and runs the program inside a sandbox, then returns the output.

There are limitations to the programs that can be run in the playground:

• The playground can use most of the standard library, with some exceptions. The only communication a playground program has to the outside world is by writing to standard output and standard error.
• In the playground the time begins at 2009-11-10 23:00:00 UTC (determining the significance of this date is an exercise for the reader). This makes it easier to cache programs by giving them deterministic output.
• There are also limits on execution time and on CPU and memory usage.