hica Playground

Ready

About the hica Playground

This playground compiles hica source code to JavaScript entirely in your browser. No server is involved. The hica compiler itself is compiled to JS via Koka's --target=js and bundled into a single file.

What works supported

Functions, closures, recursion, lambdas
If/else, match expressions, guards
For-loops, while-loops
Structs & enums (algebraic types)
Lists, tuples, slice patterns
Pipe operator (|>), string interpolation
Maybe (Some/None) and Result (Ok/Err)
Standard math, string, and list functions

Known limitations not supported

max(), min() with multiple arguments are limited
Map functions (map_get, map_set, map_keys, etc.) are not available
File I/O (read_file, write_file)
CLI args (get_args) – no command line in the browser
Interactive input (readline)
Multi-module imports
Algebraic effects / handlers
External Koka/C interop (extern)

Tips

Press Ctrl+Enter (or Cmd+Enter) to run
Use the Examples dropdown to try working programs
Click Share to copy a URL with your code embedded
See the Language Reference for full syntax documentation

Press Run (Ctrl+Enter) to execute your hica code.