How to display the array?

Question

I have 3 arrays:

Array1 and Array2 have connections to each other:

var Array1 = ['Bob','James','Kanye','West'];
var Array2 = [0,1,2,3];
var Array3 = [1,3,0,2];

How do I display it to this?

Array4 = ['James', 'West', 'Bob','Kanye'];

What have you tried up to this point? Can you provide some code you've attempted? — James Oravec, Mar 23 '17 at 23:09

score 0 · Answer 1 · answered Mar 23 '17 at 22:33

0

You need to run a loop over Array, take the integer inside as indexnumber, then you print out the first array with the numbers you just took from the first array.

answered Mar 23 '17 at 22:33

Ara Light

37
1
5

score 0 · Accepted Answer · answered Mar 23 '17 at 22:39

you will require 2 loops, 1 will go through each element of Array3 and Second loop will be used to find the index value will be compared with Array2 to find index of Array 1 and then that index value will be saved in Array4 from Array1

 for (var i = 0; i < Array3.length; i++) 
 {
    var index = Array3[i];
    var position=-1;
    for(var j=0; j < Array2.length;j++)
    {
       if(index==Array2[j])
       {
          position = j;
          break;         
       }
    }
    Array4[i] = Array1[j];
 }

score 0 · Answer 3 · edited May 23 '17 at 11:54

You need to use -- and read the documentation for -- arrays' map method:

const names  = ['Bob','James','Kanye','West'];
const order = [1,3,0,2];
const orderedNames = order.map(x => names[x]);
console.log(orderedNames);
// => ["James", "West", "Bob", "Kanye"]

Fiddle: https://jsfiddle.net/68hrrjx3/

Also kinda relevant in the context of the other answers: What is the difference between declarative and imperative programming

How to display the array?

3 Answers3