How to Sort a JavaScript Array Based on Another Array's Order Without Using IDs?

Sort a JavaScript Array Based on Another Array's Order Without IDs

Consider the following scenario: you have two arrays, itemsArray and sortingArr. itemsArray contains name-letter pairs, like ['Anne', 'a'], while sortingArr specifies the desired letter order, for instance, ['b', 'c', 'b', 'b', 'a', 'd'].

The goal is to rearrange itemsArray so that its order matches that of sortingArr as much as possible, despite lacking unique identifiers.

One elegant and efficient way to achieve this is through the sort method:

In this snippet, the sort method uses a custom comparison function to compare each element in itemsArray. The function returns the difference between the index of the current element in sortingArr and the index of the other element. This comparison ensures that elements with the same letter are grouped together and ordered according to sortingArr.

The output itemsArray will be rearranged as follows:

The above is the detailed content of How to Sort a JavaScript Array Based on Another Array's Order Without Using IDs?. For more information, please follow other related articles on the PHP Chinese website!