var a = {
    "name": "wpx",
    "age" : 10+20,
    "sex": true
};
println(a["sex"]);
println(a["age"]);

var a = [1, 2, [3, 1, 2]];
a = append(a, 8, 7, 9);
for(var i = 0; i < len(a); i=i+1) {
    if(i==2) {
        println(a[i][1]);
    }else{
        println(a[i]);
    }
}