javascript - 比较数组中的对象属性

Question

将一组对象存储在一个数组中。如果我想比较像重量这样的属性，我应该如何以最有效的方式进行比较？假设我希望当权重 = 10 时水果篮是满的。

var fruitBasket = []
function addFruit(fruit, weight) {
 return {
  fruit: fruit,
  weight: weight  
 }
}
fruitBasket.push(addFruit(apple, 2));
fruitBasket.push(addFruit(orange, 3));
fruitBasket.push(addFruit(watermelon, 5));
//etc...

Answer 1

您需要在 fruitBasket 数组中的某处维护权重总和，并且在添加之前，您应该根据项目的添加重量检查它。通过访问数组 -> 对象，无需过多担心添加项目的个体重量，而是让您的函数处理它。

var totalWeight = 0,
    maxWeight = 10;

function addFruit(fruit, weight) {
  // Adds items to the fruit basket iff weight does not exceed maxWeight
  if((totalWeight + weight) <= maxWeight) {
    totalWeight += weight;
    return {
      fruit: fruit,
      weight: weight  
    }
  }
}