Sort two arrays the same way

Question

For example, if I have these arrays:

var name = [\"Bob\",\"Tom\",\"Larry\"];
var age =  [\"10\", \"20\", \"30\"];

And I use name.sort

Answer 1

You could get the indices of name array using Array.from(name.keys()) or [...name.keys()]. Sort the indices based on their value. Then use map to get the value for the corresponding indices in any number of related arrays

const indices = Array.from(name.keys())
indices.sort( (a,b) => name[a].localeCompare(name[b]) )

const sortedName = indices.map(i => name[i]),
const sortedAge = indices.map(i => age[i])

Here's a snippet:

const name = ["Bob","Tom","Larry"],
      age =  ["10", "20", "30"],
      
      indices = Array.from(name.keys())
                     .sort( (a,b) => name[a].localeCompare(name[b]) ),
                     
      sortedName = indices.map(i => name[i]),
      sortedAge = indices.map(i => age[i])

console.log(indices)
console.log(sortedName)
console.log(sortedAge)