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return the index of new shuffled element

Here is what I want:

I have first array and I have the index as below:

const first = ['a','b','c'];
const index = 1; // the index of b

const shuffled = ['c','a','b']; // now the index of b is 2

In the first array the index points to the second element in the array which is b right?

Now I shuffled the first array and we have the shuffled array .

The index of b is 2 right now. I want to return this new index...

3 months ago ·

Juan Pablo Isaza

3 answers

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You can use,

Let value = first[index]

let newValue =shuffled.indexof(value)

3 months ago · Juan Pablo Isaza Report

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you can use shuffled.indexOf(first[index])

first[index] returns the value of the first index in this case 'b'

shuffled.indexOf('b') would return the index of b in the shuffled array

3 months ago · Juan Pablo Isaza Report

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Accepted Answer · 2022-07-12T06:21:15.574Z

Using Array#indexOf:

const first = ['a','b','c'];
const index = 1;
const shuffled = ['c','a','b'];

const target = first[index];
const newIndex = shuffled.indexOf(target);

console.log(newIndex);