Find the person who has many skills in the users' object.
const users = {
Alex: {
email: 'alex@alex.com',
skills: ['HTML', 'CSS', 'JavaScript'],
age: 20,
isLoggedIn: false,
points: 30
},
Asab: {
email: 'asab@asab.com',
skills: ['HTML', 'CSS', 'JavaScript', 'Redux', 'MongoDB', 'Express', 'React', 'Node'],
age: 25,
isLoggedIn: false,
points: 50
},
Brook: {
email: 'daniel@daniel.com',
skills: ['HTML', 'CSS', 'JavaScript', 'React', 'Redux'],
age: 30,
isLoggedIn: true,
points: 50
},
Daniel: {
email: 'daniel@alex.com',
skills: ['HTML', 'CSS', 'JavaScript', 'Python'],
age: 20,
isLoggedIn: false,
points: 40
},
}
Is there any function so that I can calculate the length of each users skill's at once and then find which user have the maximum skills?
you can do something like this
const userWithMaxSkills = users => Object.entries(users)
.reduce((res, [username, data]) => {
if(data.skills.length > res.maxSkills){
return {
maxSkills: data.skills.length,
user: {
[username]: data
}
}
}
return res
},
{
maxSkills: -1,
user: undefined
}
).user
const users = {
Alex: {
email: 'alex@alex.com',
skills: ['HTML', 'CSS', 'JavaScript'],
age: 20,
isLoggedIn: false,
points: 30
},
Asab: {
email: 'asab@asab.com',
skills: ['HTML', 'CSS', 'JavaScript', 'Redux', 'MongoDB', 'Express', 'React', 'Node'],
age: 25,
isLoggedIn: false,
points: 50
},
Brook: {
email: 'daniel@daniel.com',
skills: ['HTML', 'CSS', 'JavaScript', 'React', 'Redux'],
age: 30,
isLoggedIn: true,
points: 50
},
Daniel: {
email: 'daniel@alex.com',
skills: ['HTML', 'CSS', 'JavaScript', 'Python'],
age: 20,
isLoggedIn: false,
points: 40
},
}
console.log(userWithMaxSkills(users))You can simply sort() the Object.entries by skills.length and retrieve the first element. Here turning the result back into an object with Object.fromEntries().
const users = { Alex: { email: 'alex@alex.com', skills: ['HTML', 'CSS', 'JavaScript'], age: 20, isLoggedIn: false, points: 30 }, Asab: { email: 'asab@asab.com', skills: ['HTML', 'CSS', 'JavaScript', 'Redux', 'MongoDB', 'Express', 'React', 'Node'], age: 25, isLoggedIn: false, points: 50 }, Brook: { email: 'daniel@daniel.com', skills: ['HTML', 'CSS', 'JavaScript', 'React', 'Redux'], age: 30, isLoggedIn: true, points: 50 }, Daniel: { email: 'daniel@alex.com', skills: ['HTML', 'CSS', 'JavaScript', 'Python'], age: 20, isLoggedIn: false, points: 40 }, };
const result = Object.fromEntries([
Object.entries(users).sort((a, b) => b[1].skills.length - a[1].skills.length)[0]
]);
console.log(result);But I completely agree with @DimVai s comment – an array is definitely a more appropriate choice for data of this type, and also simplifies retrieving your desired result.
const users = [{ name: 'Alex', email: 'alex@alex.com', skills: ['HTML', 'CSS', 'JavaScript'], age: 20, isLoggedIn: false, points: 30 }, { name: 'Asab', email: 'asab@asab.com', skills: ['HTML', 'CSS', 'JavaScript', 'Redux', 'MongoDB', 'Express', 'React', 'Node'], age: 25, isLoggedIn: false, points: 50 }, { name: 'Brook', email: 'daniel@daniel.com', skills: ['HTML', 'CSS', 'JavaScript', 'React', 'Redux'], age: 30, isLoggedIn: true, points: 50 }, { name: 'Daniel', email: 'daniel@alex.com', skills: ['HTML', 'CSS', 'JavaScript', 'Python'], age: 20, isLoggedIn: false, points: 40 },];
const [result] = users.sort((a, b) => b.skills.length - a.skills.length);
console.log(result);