计算排除平均值 - JavaScript
javascriptweb developmentfront end technologyobject oriented programming
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));
输出
这将在控制台中产生以下输出 −
49.8
