Discover the Value of an Object Property in JavaScript

Exploring different ways of accessing property values in JavaScript

$(document).ready(function () {
            var itemList = [{ id: 1, name: 'shohel' }, { id: 2, name: 'rana' }, { id: 3, name: 'shipon' }];

            //step 1 : accessing property value
            for (var i = 0; i < itemList.length; i++) {
                var id = itemList[i].id;
            }

            //step 2 : another way to access property value
            for (var i = 0; i < itemList.length; i++) {
                var id = itemList[i]['id'];
            }

            //confused about which syntax is more efficient?
        });

Seeking clarity on the best method to retrieve property values in JavaScript. Can you help me decide?

Answer №1

Both methods serve their purpose effectively.

Difference between Dot and Square Bracket Notation:

  1. Dot notation is quicker to type and easier to understand.
  2. Square bracket notation allows access to properties with special characters and selection of properties using variables.

In my view, the first method is more suitable for this scenario. The second method should be used when the index is a predefined variable, as shown below:

var index = 'id';
var id = itemList[i][index]; 

In such cases, the second solution is not only necessary but also superior in terms of efficiency.

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