javascript - 对数组中的字符串值求和

Question

我正在尝试使用 GTM 自定义 JS 来汇总数组中的产品价格。数组元素是可变的。我的数据源变量如下所示:

dl_products_checkout = [ { name: 'Sports Gel SPF 20', id: '1125200001', price: '23.9', brand: 'ultrasun', quantity: 1 }, { name: 'Almost Powder Makeup SPF 15 9 g Neutral', id: '1081040004', price: '25.9', brand: 'Clinique', quantity: 1 } ]

不幸的是，我得到 NaN 作为返回值。到目前为止，这是我的解决方案:

function() {
  var items = {{dl_products_checkout}};
  var ids = [];
  var totalValue = 0;
  var i, len;
  for (i = 0, len = items.length; i < len; i++) {
    totalValue += parseInt(items[i].price);
  }
  return ids.push(totalValue);
}

如果有人能告诉我我在这里做错了什么，那就太好了。非常感谢!

最诚挚的问候， 安东

Answer 1

首先，我认为您返回了错误的值......

试试这个:

/***
    We create a function, we might want to use it more then once.
***/
function CalculateTotal( items ) {
    // First we check if we have something to work with.
    if ( items.length < 1 || items === undefined ) {
        return null;

    } else { // We can do stuff
        var total_value = 0; // we need something to store the total value in.

        for ( var i = 0; i < items.length; i ++ ) { // Let's go through the list.
            total_value += items[i].price; // add the price to total
            console.log( "total_value = " + total_value ); // check total value
            console.log( items[i].name + " = " + items[i].price ); // check item price
        }
        // now we are all done
        return total_value;
    }

并使用类似:

var total = CalculateTotal( dl_products_checkout );