Sort in multi-dimensional arrays in JavaScript

Javascript Web Development Front End Technology Object Oriented Programming

Suppose, we have the following array of arrays −

const arr = [
["A","F","A","H","F","F"],
 ["F","A","A","F","F","H"]
];

We are required to write a JavaScript function that takes in one such array.

The function should sort all the subarrays of the given array internally according to these rules −

If the elements are not either "A" or "F", they should maintain their position
If the element is either of "A" or "F", they should be sorted alphabetically

Therefore, the final output for the above array should look like −

const output = [ ["A","A","A","H","A","F"],
["F","F","F","F","F","H"]
];

Note that elements from subarrays can change their arrays if the sorting algorithm makes them to do so.

Example

const arr = [
   ["A","F","A","H","F","F"],
    ["F","A","A","F","F","H"]
];
const customSort = (arr = []) => {
   const order = [].concat(...arr.slice()),
   res = []; order.forEach((el, ind) => {
      if (el === 'A') {
         const fIndex = order.indexOf('F');
         if (fIndex < ind){
            order[fIndex] = 'A'; order[ind] = 'F';
         };
      };
   })
   arr.forEach(el => res.push(order.splice(0, el.length)))
   return res;
}
console.log(customSort(arr));

Output

And the output in the console will be −

[ [ 'A', 'A', 'A', 'H', 'A', 'F' ], [ 'F', 'F', 'F', 'F', 'F', 'H' ] ]

AmitDiwan

Published on 21-Nov-2020 06:03:30

Previous Page Print Page