JS implements bubble sorting of JSON data

Preface

JavaScript is a widely used scripting language that provides a wealth of features and tools for processing and manipulating data. JSON (JavaScript Object Notation) is a common data format used to transfer and store data between different applications. In this article, we will explore how to use JavaScript to bubble sort JSON data to achieve the functionality of sorting by specified fields.

Understand bubble sorting algorithms

Bubble sorting is a simple but less efficient sorting algorithm. It moves the largest (or smallest) element to the end of the array by comparing and exchanging adjacent elements multiple times. By repeating this process, the elements in the array will be arranged in the specified order.

Parsing JSON data

First, we need to parse the JSON data and convert it into a JavaScript object or array for sorting operations. You can use the () method to parse a JSON string into a JavaScript object or array.

const jsonData = '[{"name":"ming","age":30},{"name":"haiyong","age":25},{"name":"lisi","age":35}]';
const data = (jsonData);

Implement bubble sorting

Next, we can write a JavaScript function that bubbling sorts. This function will take an array as an argument and sort the array in the specified order. Implementations of bubble sorting usually use nested loops to compare and exchange adjacent elements.

function bubbleSort(arr) {
  const len = ;
  for (let i = 0; i < len - 1; i++) {
    for (let j = 0; j < len - 1 - i; j++) {
      if (arr[j] > arr[j + 1]) {
        const temp = arr[j];
        arr[j] = arr[j + 1];
        arr[j + 1] = temp;
      }
    }
  }
  return arr;
}

Sort by specified fields

If you want to sort by specific fields in JSON data, we can modify the bubble sort function to compare the values ​​of the specified field.

function bubbleSortByField(arr, field) {
  const len = ;
  for (let i = 0; i < len - 1; i++) {
    for (let j = 0; j < len - 1 - i; j++) {
      if (arr[j][field] > arr[j + 1][field]) {
        const temp = arr[j];
        arr[j] = arr[j + 1];
        arr[j + 1] = temp;
      }
    }
  }
  return arr;
}

Use the above functions to bubbling the JSON data. For example, sort the above parsed data by the "age" field:

const sortedData = bubbleSortByField(data, 'age');
(sortedData);

The output result is:

[  {"name":"haiyong","age":25},  {"name":"ming","age":30},  {"name":"lisi","age":35}]

Summarize

By understanding the bubble sorting algorithm, analyzing JSON data, implementing bubble sorting functions, and sorting according to specified fields, we can use JavaScript to bubble sorting JSON data. This allows us to sort the data in the specified order and meet specific needs. By mastering this technique, we can better process and manipulate JSON data.

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