algorithm - Javascript Map - Remove item by key and update values

Question

I have a map

 const myMap = new Map();

myMap.set("10/10", 0);
myMap.set("10/11", 1);
myMap.set("10/12", 2);
myMap.set("10/13", 3);
myMap.set("10/14", 4);

and I need to remove one item by key and update all the values of the next items.

For example, if I remove the item with key "10/12", the map has to be:

console.log(myMap);
/*
   {
     "10/10": 0,
     "10/11": 1,
     "10/13": 2,
      "10/14": 3,
    }
 */

Decreasing the values which are > the removed item value by one. Any ideas?

question from:https://stackoverflow.com/questions/65841747/javascript-map-remove-item-by-key-and-update-values

Answer 1

Something like this should work:

const obj = {
   "10/10": 0, 
   "10/11": 1, 
   "10/12": 2,
   "10/13": 3,
   "10/14": 4,
}

const toRemove = "10/12"

let i = 0;
const newObj = {}
for(const property in obj){
    if(obj.hasOwnProperty(property) && property !== toRemove){
        newObj[property] = i;
        i++;
    }
}

console.log(newObj);