Resolved: Rearrange array elements from the updated indexing array

Question:

I don’t really know how to explain my problem so sorry for the title.
I have three JavaScript arrays:

//indexing array
originalData = ['data1', 'data2', 'data3']

//target array
originalPos = ['50 a', '80 b', '31 c']

//updated indexing array
newData = ['data1', 'data3', 'data2']

With that array, I want to get the new order of the originalPos array by using newData array like this :

originalPos = ['50 a', '31 c', '80 b']

The goal is to be able to change the position of my waypoints in the Leaflet Routing Machine using L.routing.machine.spliceWaypoints()

Answer:

You can rearrange by finding the position of every element of originalPos in originalData and with that respective position you can push the element from newData into the result array.
Assuming there is no duplicate data within all three arrays

const originalData = ['data1', 'data2', 'data3']
const originalPos = ['50 a', '80 b', '31 c']
const newData = ['data1', 'data3', 'data2']

const newPos = newData.map(n => n && originalPos[originalData.indexOf(n)]);

console.log(newPos);

If you have better answer, please add a comment about this, thank you!

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