javascript - 如何迭代对象数组并添加属性

Question

下面是一个对象数组示例:

[{Name : Deji, Age: 12}, {Name : Sonia, Age 13}, {Name : Fabio, Age: 21}]

如何迭代数组以将数组中人员的年龄相加。

有没有可以统计玩家年龄的函数？

Answer 1

使用Array#forEach和 Array#reduce迭代数组项并将每个玩家的年龄添加到变量中。

forEach

const players = [{Name : 'Deji', Age: 12}, {Name : 'Sonia', Age: 13}, {Name : 'Fabio', Age: 21}];

let age = 0;

players.forEach(player => age += player.Age);

console.log(age);

减少

const players = [{Name : 'Deji', Age: 12}, {Name : 'Sonia', Age: 13}, {Name : 'Fabio', Age: 21}];

const age = players.reduce((sum, player) => sum + player.Age, 0);

console.log(age);