javascript - 数组和某些数组空白的数组总和

Question

这是数组

Product Details = [{Amount: '49.95'}, {Amount: ''}]

这里使用了 Javascript:

function() {
  var prods = {{Product Details}}; // Product Araay
  var Amount = 0;
  var i, len;
  for (i = 0, len = prods.length; i < len; i++) {
    Amount += parseInt(prods[i].Amount);
  }
  return Amount;
}

============结果==============

NaN

Answer 1

• 如果其值为 falsy 值，则将其默认为 0。
• 还可以使用 parseFloat 而不是 parseInt，因为您有 float 值:)

var Details = [{Amount: '49.95'}, {Amount: ''}, {Amount: '15.25'}]

function sums () {
  var prods = Details; // Product Array
  var Amount = 0;
  var i, len;
  for (i = 0, len = prods.length; i < len; i++) {
    Amount += parseFloat(prods[i].Amount || 0);
  }
  return Amount;
}

console.log(sums())