while sorting js object of arrays, it is returning keys array instead of objects

Question

Here is my code:

let originalFloorsArr = {
  '10': [1,2,3],
  '11':[1,2,3],
  '13': [1,2,3,4]
}

let reversedFloorsArr = {};
Object.entries(originalFloorsArr).map(([key, item], i) => {
  reversedFloorsArr[key] = Object.keys(item).sort(
    (a, b) => item[b] - item[a]
  );
});

console.log("originalFloorsArr", originalFloorsArr);
console.log("reversedFloorsArr", reversedFloorsArr);

In this example, instead of reutning 3,2,1 for index 10 it is returning 2,1,0. However, there is no such value like 0 on originalFloorsArr[10]

trincot · Accepted Answer · 2022-08-18 11:25:17Z

3

That is because you get the keys of the inner arrays, while you need the values. So replace

Object.keys(item).sort(
    (a, b) => item[b] - item[a]
);

with

Object.values(item).sort(
    (a, b) => b - a
);

edited Aug 18, 2022 at 11:25

answered Aug 18, 2022 at 11:21

trincot

357k38 gold badges282 silver badges338 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Akinbobola Oluwatoyin · Accepted Answer · 2022-08-18 11:34:59Z

2

let originalFloorsArr = {
    '10': [1,2,3],
    '11':[1,2,3],
    '13': [1,2,3,4]
}

  
for(let key in originalFloorsArr) { 
   originalFloorsArr[key].reverse()
}

console.log(originalFloorsArr['10']) //returns [3,2,1]

To reverse each array value in each property, you can use the Object for (let key in obj) method to iterate through the object, then reverse the array using the array reverse() method.

answered Aug 18, 2022 at 11:34

Akinbobola Oluwatoyin

915 bronze badges

2 Comments

Andy Over a year ago

This would only work if the elements in the arrays were in order.

Akinbobola Oluwatoyin Over a year ago

Oh yeah, that's right. Using .sort() is the best solution then. Thank you Andy

Collectives™ on Stack Overflow

while sorting js object of arrays, it is returning keys array instead of objects

2 Answers 2

Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related