使用 JavaScript ES6 Reduce 方法基于 2 个数组创建结果数组

Question

你好，实际上我有两个数组（服务和报价），我正在尝试使用 reduce 方法根据服务 ID 将报价数组与服务数组连接起来，我尝试了不同的方法，但没有任何效果我无法解决这个问题检查我的 js fiddle link（无法连接报价数组）。请帮我解决这个问题。提前致谢

const services = [
                   {
                    cid:1,
                    catname:'Facial',
                    services:[
                      {
                       sid:30,
                       sname:'Fruit facial'
                      },
                      {
                       sid:33,
                       sname:'Herbal facial'
                      }
                    ]
                   },
                   {
                    cid:2,
                    catname:'Massage',
                    services:[
                      {
                       sid:40,
                       sname:'Head Massage'
                      },
                      {
                       sid:45,
                       sname:'Back Massage'
                      },
                      {
                       sid:46,
                       sname:'Face Massage'
                      }
                    ]
                   }
            ]

提供数组 - 这里基于服务 ID (sid) 我想连接服务数组并创建新数组

const offer = [
               {
                 offid:1,
                 sid:'33,40'
                 offvalue : 10%
               },
               {
                 offid:2,
                 sid:'45,46',
                 offvalue : 100
               }
             ]

预期结果：

const Result = [
                   {
                    cid:1,
                    catname:'Facial',
                    services:[
                      {
                       sid:30,
                       sname:'Fruit facial'
                      },
                      {
                       sid:33,
                       sname:'Herbal facial',
                       offid:1,
                       offvalue : 10%
                      }
                    ]
                   },
                   {
                    cid:2,
                    catname:'Massage',
                    services:[
                      {
                       sid:40,
                       sname:'Head Massage',
                       offid:1,
                       offvalue : 10%
                      },
                      {
                       sid:45,
                       sname:'Back Massage',
                       offid:2,
                       offvalue : 100
                      },
                      {
                       sid:46,
                       sname:'Face Massage',
                       offid:2,
                       offvalue : 100
                      }
                    ]
                   }
           ]

Answer 1

如果您可以使用 ES6 功能，那么这应该可行：

const services = [{
  cid:1,
  catname:'Facial',
  services: [{
    sid:30,
    sname:'Fruit facial'
  }, {
    sid:33,
    sname:'Herbal facial'
  }],
}, {
  cid:2,
  catname:'Massage',
  services: [{
    sid:40,
    sname:'Head Massage'
  }, {
    sid:45,
    sname:'Back Massage'
  }, {
    sid:46,
    sname:'Face Massage'
  }],
}];

const offer = [{
  offid:1,
  sid:'33,40',
  offvalue : "10%"
}, {
  offid:2,
  sid:'45,46',
  offvalue : "100"
}];

const result = services.map(val => {
  return {
    ...val,
    services: val.services.map(serv => {
      // Here is where we find any matching offers, then add their data to the service.
      const off = offer.find(x => x.sid.split(",").includes(String(serv.sid)));
      if (off) {
        serv.offid = off.offid;
        serv.offvalue = off.offvalue;
      }
      return serv;
    }),
  }
});

console.log(result);