How Can I Efficiently Iterate Over Nested JSON Structures in JavaScript?

Iterating Over JSON Structures in JavaScript

When working with data in JavaScript, you often encounter nested JSON structures. Traversing and processing these structures efficiently is crucial for manipulating the data effectively.

A common scenario is iterating over a list of JSON objects, each representing a specific entity or record. To do this, you can utilize loops to iterate over the array and access each object.

For example, consider the following JSON structure:

[{"id":"10", "class": "child-of-9"}, {"id":"11", "classd": "child-of-10"}]

To iterate over this structure, you can use a for loop as follows:

var arr = [{"id":"10", "class": "child-of-9"}, {"id":"11", "class": "child-of-10"}];

for (var i = 0; i < arr.length; i++){
  console.log("array index: " + i);
  var obj = arr[i];
  for (var key in obj){
    var value = obj[key];
    console.log(" - " + key + ": " + value);
  }
}

This code initializes an array arr with the provided JSON structure. The outer for loop iterates through the array elements. For each element, an inner for-in loop iterates through the object's key-value pairs, printing the key and value for each pair. This allows you to access and process the data within each object in the JSON structure as needed.

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