从数组中检索元素是javascript中的对象的元素

Question

i have two arrays variables in which each element is an object having some properties like this :

var employees = [{
                 name: 'Jack',
                 empId: 0,
                 age: 25,
                 orgId: 1
                 }, {
                 name: 'Lucifer', 
                 empId: 1,
                 age: 35,
                 orgId: 2
                 }, {
                 name: 'Adam',
                 empId: 3,
                 age: 46,
                 orgId: 1
                 }, {
                 name: 'Eve',
                 empId: 4,
                 age: 30,
                 orgId: 3
               }];

and the second variable is

var companies= [{
 name: 'Microsoft',
 id: 1,
 employees: [5 , 9]
}, {
 name: 'Google',
 id: 2,
 employees: [1]
}, {
 name: 'LinkedIn',
 id: 3,
 employees: [10]
}];

so now i want that when i give a company name (for example: Google),then it will return the employee details. i want to do it by using filter()/reduce() method, but i am not able to do it . Help needed .. thank you

Answer 1

You can do that with a forEach loop and checking the name:

var Employees = []; //initialize  
companies.forEach(function(company) {
    if (company.name == "Microsoft"){
        Employees = company.employees;
        //whatever you like
        Employees.forEach(function(id){
              alert(id);
        });

    }
});

Working JsFiddle: https://jsfiddle.net/sapyt777/

Answer 2

If the employee orgId is the same as the company id you can use filter ; one to get the id , and then another to grab the employees associated with that id. The function returns an array of employees.

function getEmployees(company) {
  var id = companies.filter(function (el) {
      return el.name === company;
  })[0].id;
  return employee.filter(function (el) {
      return el.orgId === id;
  });
}

getEmployees('Microsoft');

OUTPUT

[
  {
    "name": "Jack",
    "empId": 0,
    "age": 25,
    "orgId": 1
  },
  {
    "name": "Adam",
    "empId": 3,
    "age": 46,
    "orgId": 1
  }
]

DEMO

Answer 3

Trying to brush-up my skills. So I'm pretty sure it works but I don't know if it's a good way to achieve what you want!

var input = "Microsoft";

for(company in companies) {
    if(companies[company].name === input) {
        for(emp in employee) {
            if(companies[company].id === employee[emp].orgId)
            {
                console.log(employee[emp]);
            }
        }
    }
}