Implementing an automated numbering system in Typescript to assign a unique id attribute to every object within an array

I am currently dealing with an array of objects:

myArray = [
        {
            "edoId": "4010",
            "storeName": "ABBEVILLE"
        },
        {
            "edoId": "3650",
            "storeName": "AGEN"
        },
        {
            "edoId": "3298",
            "storeName": "AIX ALLEES PROVENCALES"
        },
        {
            "edoId": "3309",
            "storeName": "AIX JAS DE BOUFFAN"
        },
        {
            "edoId": "3313",
            "storeName": "AIX LA PIOLINE"
        },
        {
            "edoId": "2119",
            "storeName": "AIX LES BAINS"
        },
    ...
    ]

I am looking for a way to add an auto-incremental id property to each object in my array, specifically using the forEach method (not by looping with myArray.length).

Any suggestions on how to achieve this?

javascripttypescript

Answer №1

You have the option to utilize the forEach() method in your query:

myArray.forEach(function(item, index){
    item.id = index;
    // or perform any desired action with the index
});

The forEach() function executes the provided callback for each element within the array in ascending order. It bypasses index properties that are deleted or uninitialized (e.g., sparse arrays). The callback receives three arguments:

  1. the element value
  2. the element index
  3. the array being traversed

var myArray = [
        {
            "edoId": "4010",
            "storeName": "ABBEVILLE"
        },
        {
            "edoId": "3650",
            "storeName": "AGEN"
        },
        {
            "edoId": "3298",
            "storeName": "AIX ALLEES PROVENCALES"
        },
        {
            "edoId": "3309",
            "storeName": "AIX JAS DE BOUFFAN"
        },
        {
            "edoId": "3313",
            "storeName": "AIX LA PIOLINE"
        },
        {
            "edoId": "2119",
            "storeName": "AIX LES BAINS"
        }
    ];

myArray.forEach(function(item, index){
  item.id = index;
});

console.log(myArray);

Answer №2

Try this solution

myArray.forEach(item => ({id: ++item.id, name: item.name}))

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