Dictionaries

Source:

actor main(env):
    d = {"foo": 1, "bar": 2}
    d["cookie"] = 3

    print("Dict: " + str(d))
    print("len : " + str(len(d)))
    print("item foo: " + str(d["foo"]))
    print("item foo: " + str(d.get("foo", "default")))
    print("get default value when key nonexistent: " + str(d.get("foobar", "DEF_val")))
    
    d["bar"] = 42
    del d["foo"]
    print("Dict: " + str(d))
    
    print("Dict keys: " + str(list(d.keys())))
    print("Dict values: " + str(list(d.values())))

    print("Dict items:")
    for k, v in d.items():
        print("  dict key " + k + "=" + str(v))

    print("Pop last item:", d.popitem())
    print("Dict after .popitem():", d)

    env.exit(0)

Compile and run:

actonc dicts.act
./dicts

Output:

Dict: {"foo":1, "bar":2, "cookie":3}
len : 3
item foo: 1
item foo: 1
get default value when key nonexistent: DEF_val
Dict: {"bar":42, "cookie":3}
Dict keys: ["bar", "cookie"]
Dict values: [42, 3]
Dict items:
  dict key bar=42
  dict key cookie=3
Pop last item: ("cookie", 3)
Dict after .popitem(): {"bar":42}