使用javascript基于另一个数组对一个数组进行排序

Question

I have two arrays

1. MRP [60 80 82 50 80 80 ]
2. Brand [ ABCDEF ]

I need to get top two brands based on MRP. highest two in MRP is 82 ,80 but 80 is 3 times repeated so i need all repeated values as well to get top two brands. ie i need to display [CBEF]

For that i sorted MRP in descending order.Now MRP after sorting become [ 82 80 80 60 50 ]

Now i need to sort Brand Array based on Sorted MRP.Can some one help in this sorting using javascript .

Answer 1

Try below code

var A = [60, 80, 82, 50, 80, 80];
var B = ['a', 'b', 'c', 'd', 'e', 'f'];

var all = [];

for (var i = 0; i < B.length; i++) {
    all.push({ 'A': A[i], 'B': B[i] });
}

all.sort(function(a, b) {
  return b.A - a.A;
});

A = [];
B = [];

for (var i = 0; i < all.length; i++) {
   A.push(all[i].A);
   B.push(all[i].B);
}    

alert(A);
alert( B);

Answer 2

Using lodash/underscore:

var A = [60, 80, 82, 50, 80, 80];
var B = ['a', 'b', 'c', 'd', 'e', 'f'];

var result = _.unzip(_.sortBy(_.zip(A, B), '-0'));

var A_sorted = result[0]; // [82, 80, 80, 80, 60, 50]
var B_sorted = result[1]; // ["c", "b", "e", "f", "a", "d"]]