Question

使用Javascript，那么你将如何迭代数组呢？将结果存储到单个对象或变量中？我知道我可以轻松编写单独的函数来实现这一目标，但如果我需要在单个函数中执行此操作会怎样？

这段代码符合我的要求，但显然是重复的。你如何干掉这段代码并将结果返回一个变量？

var groupIds = ['G8372', 'G895', 'G12030'];

var groupOne = this.state.groups.find(g => g.get('extId') === groupIds[0]);
var groupTwo = this.state.groups.find(g => g.get('extId') === groupIds[1]);
var groupThree = this.state.groups.find(g => g.get('extId') === groupIds[2]);

var groupOneMembers = groupOne.get('members')
  .filter(member => member.get('role') === 'member');
var groupTwoMembers = groupTwo.get('members')
  .filter(member => member.get('role') === 'member');
var groupThreeMembers = groupThree.get('members')
  .filter(member => member.get('role') === 'member');

var totalMembers = groupOneMembers.size + groupTwoMembers.size + groupThreeMembers.size;

return totalMembers;

Answer 1

像这样：

let total = 0;
for (let gid of ['G8372', 'G895', 'G12030']) {
    total +=
        this.state.groups.find(g => g.get('extId') === gid)
        .get('members').filter(member => member.get('role') === 'member')
        .size;
}
return total;

Answer 2

int

不是100％肯定你的数据组成。

如何遍历数组并将结果存储在单个对象或变量中？

2 个答案: