Question

This works:

for (var i = 0; i < this.size(); i++) {
    values.push(this.cards[i].value);
}

but this doesn’t:

for (var card in this.cards) {
    values.push(card.value);
}

Why?

Answer 1

Because in for...in loops, the variable is the key, not the value.

It should be:

for (var card in this.cards) {
    values.push(this.cards[card].value);
}