MonkeyLang Interpreter

Implementation of a Monkey interpreter, as described in Writing an Interpreter in Go.

Features

• Integers, booleans, strings, arrays, hash maps
• Arithmetic expressions, let statements, recursions, closures
• First-class and higher-order functions
• Built-in functions
• REPL

Syntax

let people = [{"name": "Anna", "age": 24}, {"name": "Bob", "age": 99}];

let getName = fn(person) { person["name"]; };
getName(people[0]);

let fibonacci = fn(x) {
  if (x == 0) {
    0
  } else {
    if (x == 1) {
      return 1;
    } else {
      fibonacci(x - 1) + fibonacci(x - 2);
    }
  }
};