An interpreter for the Monkey programming language, from the book Writing an Interpeter in Go.
cargo run to start the REPL. Try something like defining map:
>> let map = fn(arr, f) {
let iter = fn(arr, accumulated) {
if (len(arr) == 0) {
accumulated
} else {
iter(rest(arr), push(accumulated, f(first(arr))));
}
};
iter(arr, []);
};
>> let a = [1, 2, 3, 4];
>> let double = fn(x) { x * 2 };
>> map(a, double)
[2, 4, 6, 8]