Porting invRegex.py to Javascript (Node.js)

Question

I have been trying to port invRegex.py to a node.js implementation for a while, but I\'m still struggling with it. I already have the regular expression parse tree thanks to

Answer 1

There already are plenty of good answers here, but I specifically wanted the generator part to work, which did not for you. It seems that you were trying to do this :

//the alphanumeric part
for (x of alpha()) for (y of numeric()) console.log(x + y);

//or as generator itself like you wanted
function* alphanumeric() {
    for (x of alpha()) for (y of numeric()) yield(x + y);
}
//iterating over it
for (var i of alphanumeric()) {
    console.log(i);
}

Output:

a0
a1
b0
b1
c0
c1

You can use this for cartesian product required in regex matching.