Read JSON Data from a File

const fs = require('fs');

const person = {
    name: "أحمد",
    age: 30,
    isMarried: false,
    children: ["سارة", "علي"]
};

const jsonString = JSON.stringify(person, null, 2);

fs.writeFile('person.json', jsonString, (err) => {
    if (err) {
        console.error('حدث خطأ أثناء الكتابة إلى الملف', err);
    } else {
        console.log('تم كتابة الملف بنجاح!');
    }
});

قد يحتوي JSON على بيانات متداخلة مثل الكائنات داخل كائنات أو مصفوفات داخل كائنات. يمكنك التعامل مع هذه البيانات بنفس الطريقة التي تتعامل بها مع الكائنات والمصفوفات في JavaScript.

Here’s a basic overview:

Before the Fetch API, the traditional way to make AJAX requests was using XMLHttpRequest.

Add the updateBook function to main.go:

func updateBook(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	params := mux.Vars(r)
	for index, item := range books {
		if item.ID == params["id"] {
			books = append(books[:index], books[index+1:]...)
			var book Book
			_ = json.NewDecoder(r.Body).Decode(&book)
			book.ID = params["id"]
			books = append(books, book)
			json.NewEncoder(w).Encode(book)
			return
		}
	}
	json.NewEncoder(w).Encode(books)
}

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• Delete an item:

  curl -X DELETE http://127.0.0.1:5000/api/items/3

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// Import 'fs' module
const fs = require('fs');

// Read a file
fs.readFile('file.txt', 'utf8', (err, data) => {
  if (err) throw err;
  console.log(data);
});

// Write to a file
fs.writeFile('newfile.txt', 'Hello, Node.js!', (err) => {
  if (err) throw err;
  console.log('File written successfully.');
});

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import json

# Define the JSON file to read and write
json_file = 'list.json'

# Read the existing JSON data
try:
    with open(json_file, 'r') as file:
        json_list = json.load(file)
        print("Successfully loaded the JSON file.")
except FileNotFoundError:
    print(f"File '{json_file}' not found. Initializing with an empty list.")
    json_list = []
except json.JSONDecodeError:
    print(f"File '{json_file}' is not a valid JSON file. Initializing with an empty list.")
    json_list = []

# New data to add to the JSON
new_entry = {'Name': 'The Good Coder', 'Hobbies': 'Code, Write Code!'}

# Append the new data to the JSON list
json_list.append(new_entry)
print("New entry added to the JSON list.")

# Write the updated list back to the JSON file
with open(json_file, 'w') as file:
    json.dump(json_list, file, indent=4)
    print(f"Updated JSON data written to '{json_file}'.")