danprince/ljsp

🦕 Lisp in your language.

ljsp

A toy Lisp implemented using arrays and functions in Javascript. If you're wondering why such an abomination exists, then go check out the blog post that is responsible for its inception.

Examples

["print", "Hello, World!"]

["defn", "greeting", ["name"],
  ["print", "Hello", "name"]]

["greeting", "Dan"]

["=", 5, 5]

["+", 10, 20]

["and", true, true]

["or", true, false]

For more involved examples, take a look in the examples/ directory. To run an example, use bin/run-example example-name.json.

REPL

To use the REPL, clone the repository and run npm install. This will install the dependencies needed for running the REPL (chalk and readline).

Then running ./bin/repl will start it up. See how it is used in the Asciicast below.

ljsp's Issues

native/math division is wrong?

https://github.com/danprince/jsxpr/blob/master/native/math.js#L33

Change function name 'eval'

Javascript strict mode doesn't let you use this function name, could you change it for lets say 'evaluate"? :)

Accept extra functions into the scope when calling interpret

'interpret' function could accept one more param and mix it with 'native' so external functionsfunctions can be added.

This would be an awesome feature for someone who is delivering dynamic code to a host that has the defined functions. :)