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Sorting Array based on another array JavaScript
Suppose, we have two arrays like these −
const input = ['S-1','S-2','S-3','S-4','S-5','S-6','S-7','S-8']; const sortingArray = ["S-1", "S-5", "S-2", "S-6", "S-3", "S-7", "S-4", "S-8"];
We are required to write a JavaScript function that takes in two such arrays as first and second argument respectively.
The function should sort the elements of the first array according to their position in the second array.
The code for this will be −
Example
const input = ['S-1','S-2','S-3','S-4','S-5','S-6','S-7','S-8'];
const sortingArray = ["S-1", "S-5", "S-2", "S-6", "S-3", "S-7", "S-4", "S-8"];
const sortByReference = (arr1 = [], arr2 = []) => {
const sorter = (a, b) => {
const firstIndex = arr2.indexOf(a);
const secondIndex = arr2.indexOf(b);
return firstIndex - secondIndex;
};
arr1.sort(sorter);
};
sortByReference(input, sortingArray); console.log(input);Output
And the output in the console will be −
[ 'S-1', 'S-5', 'S-2', 'S-6', 'S-3', 'S-7', 'S-4', 'S-8' ]
Updated on: 21-Nov-2020
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