README.md

YANI 2

ActionScript3.0 library of NiwaScript language engine, is licensed under the New BSD License.

Code Samples

niwan:

/
r = (\
    Math.floor(Math.random() * @0));
randColor = (\ r(255) << 16 | r(255) << 8 | r(255));
f = (\
    g.lineStyle(2, randColor());
    g.beginFill(randColor());
    g.drawRect(@0 * 30, @1 * 30, 30, 30);
    g.endFill());
100.times(\
    f(r(20), r(10)))

equivalent javascript:

r = function(n) {
    return Math.floor(Math.random() * n);
};
randColor = function() {
    return r(255) << 16 | r(255) << 8 | r (255);
};
f = function(x, y) {
    g.lineStyle(2, randColor());
    g.beginFill(randColor());
    g.drawRect(x * 30, y * 30, 30, 30);
    g.endFill();
};
i = 0;
while(i < 100) {
    f(r(20), r(10));
    i ++;
}

niwan:prototype programming

/
Array.def(lazy:true, fold,
    a := self;
    i := (@i == null).alt(0, @i);
    (i >= self.size).alt(@0,
        a.fold(i: i + 1, @1($1: @0, $2: a[i]), @1)));

[1,2,3,4,5,6,7,8,9,10].fold(0, \ $1 + $2 * $2)

equivalent javascript:

Array.prototype.fold = function(acc, f, i) {
    i |= 0;
    if(i >= this.length) {
	    return acc;
    }
    else {
        return this.fold(f(acc, this[i]), f, i + 1);
    }
};

[1,2,3,4,5,6,7,8,9,10].fold(0, function(acc, x) { return acc + x;});

niwan:meta programming(macro programming),you can also perform operation on the abstract syntax trees of the parameters

/
def(for(initial,condition,after,body), lazy: true,
        initial.eval();
        while_kari(condition.eval(),
            body.eval();
            after.eval()));

for(i := 0, i < 10, i ++,
    log(i));

equivalent javascript:not so equivalent

my_for = function(initial, condition, after, body) {
    eval(initial);
    while(eval(condition)) {
	    eval(body);
        eval(after);
    }
}

my_for("i = 0", "i < 10", "i ++",
       "console.log(i)");