如何使用Javascript基于另一个数组的相应元素的属性对数组进行排序？

Question

Say I have two arrays. One is :

A = [a, b, c, d]

and another is,

B = [w, x, y, z]

Each element in A corresponds to the respective element in B

(i.e. a -> w, b -> x, c -> y, d -> z)

Now I want to sort the array A in increasing order of an attribute (say value) of the elements of B

(eg. w.value = 3, x.value = 2, y.value = 1, z.value = 4)

Hence, my desired output is:

[c, b, a, d]

How do I do this using Javascript? Any help will be appreciated. I am stuck at this for a long time.

Answer 1

You could get the indices, sort them with values of b and map the values of a by taking sorted indices.

 var a = ['a', 'b', 'c', 'd'] , b = [3, 2, 1, 4], indices = [...b.keys()].sort((x, y) => b[x] - b[y]), result = indices.map(i => a[i]); console.log(result); 

Answer 2

To achieve expected result, use below option of using indexOf and sort

1. Sort array - a using sort with b array value using the indexOf

 var a = ["a", "b", "c", "d"] var b = [3, 2, 1, 4] console.log(a.sort((x,y) => b[a.indexOf(x)] - b[a.indexOf(y)]))