The most common multidimensional structure is an array of objects. It has some special features. Let's study them. Suppose we have the following array with users:
let users = [
{
name: 'name1',
surn: 'surn1',
},
{
name: 'name2',
surn: 'surn2',
},
{
name: 'name3',
surn: 'surn3',
},
];
Let's go through all the users and display their names and surnames in the console. When iterating over an array of objects, as a rule, only one loop over the array is used, and inside it, objects are accessed by keys. Let's do it:
for (let user of users) {
console.log(user.name + ' ' + user.surn);
}
Given the following array of employees:
let employees = [
{
name: 'name1',
salary: 300,
},
{
name: 'name2',
salary: 400,
},
{
name: 'name3',
salary: 500,
},
];
Display the data for each employee in the format name - salary.
Given the following array of employees:
let employees = [
{
name: 'name1',
salary: 300,
},
{
name: 'name2',
salary: 400,
},
{
name: 'name3',
salary: 500,
},
];
Display the sum of salaries of all employees.
Given the following array of employees:
let employees = [
{
name: 'name1',
salary: 300,
age: 28,
},
{
name: 'name2',
salary: 400,
age: 29,
},
{
name: 'name3',
salary: 500,
age: 30,
},
{
name: 'name4',
salary: 600,
age: 31,
},
{
name: 'name5',
salary: 700,
age: 32,
},
];
Display the sum of the salaries of
those employees whose age is equal
to or greater than 30
years.