计算排除平均值 - JavaScript

javascriptweb developmentfront end technologyobject oriented programming更新于 2025/12/31 11:56:17

假设我们有一个像这样的对象数组 −

const arr = [
   {val: 56, canUse: true},
   {val: 16, canUse: true},
   {val: 45, canUse: true},
   {val: 76, canUse: false},
   {val: 45, canUse: true},
   {val: 23, canUse: false},
   {val: 23, canUse: false},
   {val: 87, canUse: true},
];

我们需要编写一个 JavaScript 函数，计算所有将 canUse 标志设置为布尔值的对象的 val 属性的平均值。

示例

以下是代码 −

const arr = [
   {val: 56, canUse: true},
   {val: 16, canUse: true},
   {val: 45, canUse: true},
   {val: 76, canUse: false},
   {val: 45, canUse: true},
   {val: 23, canUse: false},
   {val: 23, canUse: false},
   {val: 87, canUse: true},
];
const excludedAverage = arr => {
   let count = 0, props = 0;
   for(let i = 0; i < arr.length; i++){
      if(!arr[i].canUse){
         continue;
      };
      props++;
      count += arr[i].val;
   };
   return (count) / (!props ? 1 : props);
};
console.log(excludedAverage(arr));