Sorting the numbers from within in JavaScript

We are required to write a JavaScript function that takes in an array of numbers and reorders the digits of all the numbers internally in a specific order (let's say in ascending order for the sake of this problem).

For example: If the array is ?

const arr = [543, 65, 343, 75, 567, 878, 87];

Then the output should be ?

const output = [345, 56, 334, 57, 567, 788, 78];

Therefore, let's write the code for this function ?

Example

The code for this will be ?

const arr = [543, 65, 343, 75, 567, 878, 87];

const ascendNumber = num => {
    const numArr = String(num).split('').map(el => +el);
    numArr.sort((a, b) => a - b);
    return numArr.join('');
};

const sortDigits = arr => {
    const res = [];
    for(let i = 0; i 

Output

The output in the console will be ?

[
  '345', '56',
  '334', '57',
  '567', '788',
  '78'
]


How It Works

The solution uses two functions:

• ascendNumber() - Converts a number to a string, splits into individual digits, sorts them in ascending order, and joins them back
• sortDigits() - Iterates through the array and applies the digit sorting to each number

Alternative Using map()

We can simplify the solution using the map() method:

const arr = [543, 65, 343, 75, 567, 878, 87];

const sortDigits = arr => {
    return arr.map(num => {
        return String(num)
            .split('')
            .sort()
            .join('');
    });
};

console.log(sortDigits(arr));

[
  '345', '56',
  '334', '57',
  '567', '788',
  '78'
]

Conclusion

This approach efficiently sorts digits within each number by converting to strings, splitting into arrays, sorting, and rejoining. The map() method provides a cleaner, more functional programming approach.