If you are using functionality that is defined in the standard library, you need to include the library:

java -jar muckefuk.jar helloworld.mkfk -J muckefuk-std.jar

Object

The object data structure provides another way of creating a namespace object. Its constructor takes a list of pairs.

import("std.Object");

obj = Object.new (
    foo: 10,
    bar: func() 18;
);

obj.foo + obj.bar();    # returns 28

This is the same as writing:

obj = {
    foo = 10;
    bar = func() 18;
};

Array

import("std.Array");

# create array
arr = Array.new(1, 2, 3, 4);

# add number
arr.add(8);

# print the size
print(arr.size());

# print all numbers
for (num in arr)
    print(num);

# clear array
arr.clear();

Map

import("std.Map");

# create map
map = Map.new(
    1: "foo",
    2: "bar"
);

# add entry
map.put(8, "test");

# get value
map.get(8);

# try to get value, otherwise return value
map.tryget(10, "nil");

# print all key-value pairs
for (k,v in map)
    print(k, v);

# clear map
map.clear();

Set

import("std.Set");

# create set
set = Set.new( 5, 1, 2, 5, 3, 3, 4 );

# add entry
set.add(8);

# check value
set.has(3);

# print all values
for (n in set)
    print(n);

# clear set
set.clear();

Further Reading

• Language
• Java Integration