等效于JavaScript中的continue语句

Question

I was wondering what the structured equivalent of a continue statement is in JavaScript? I am trying to get rid of a continue statement but not sure how. Can anyone point me in the right direction? Thanks!

function Hand() {
    this.cards = new Array();

    this.addOneCard = function(card) {
        this.cards.push(card);
    }

    this.evaluateHand = function(){
        // Needs to handle two aces better
        var total1 = new Number;
        var total2 = new Number;

        for(var i in this.cards) {
            if (this.cards[i].value == "A") { 
                total1 += 1;
                total2 += 11;
                continue;
            }
            if (isNaN(this.cards[i].value * 1)) {
                total1 += 10;
                total2 += 10;
                continue;
            } 
            total1 += Number(this.cards[i].value);
            total2 += Number(this.cards[i].value);
        }
        return [total1, total2];
    };
}

Answer 1

continue statement is valid in JavaScript. You can use it as you would in any language.

After saying that, you can read this interesting discussion on why you might want to avoid it, and how.

Answer 2

else if pair will help you here:

    for(var i in this.cards) {
        if (this.cards[i].value == "A") { 
            total1 += 1;
            total2 += 11;
        }
        else if (isNaN(this.cards[i].value * 1)) {
            total1 += 10;
            total2 += 10;
        } 
        else { 
            total1 += Number(this.cards[i].value);
            total2 += Number(this.cards[i].value);
        }
    }

Answer 3

This should hold true for any language and not just java script

function Hand() {
    this.cards = new Array();

    this.addOneCard = function(card) {
        this.cards.push(card);
    }

    this.evaluateHand = function(){
        // Needs to handle two aces better
        var total1 = new Number;
        var total2 = new Number;

        for(var i in this.cards) {
            if (this.cards[i].value == "A") { 
                total1 += 1;
                total2 += 11;
            }
            else if (isNaN(this.cards[i].value * 1)) {
                total1 += 10;
                total2 += 10;
            }
            else {
                total1 += Number(this.cards[i].value);
                total2 += Number(this.cards[i].value);
            }
        }
        return [total1, total2];
    };
}

Answer 4

One option is:

this.cards.forEach(function(card) {
    if (card.value == "A") { 
        total1 += 1;
        total2 += 11;
        return;
    }
    if (isNaN(card.value * 1)) {
        total1 += 10;
        total2 += 10;
        return;
    } 
    total1 += Number(card.value);
    total2 += Number(card.value);
});

Apparently some people think return terminates everything... return stops the function running for the current element, making the next iteration start right away, as would do continue . I'm not saying this is a better option than just using continue , but it's definitively an alternative.