Readme.md

Project Documentation: Go Application for JSON File CRUD Operations

This project is a Go application that performs basic CRUD (Create, Read, Update, Delete) operations on a JSON file named person.json. It demonstrates how to work with JSON data and file I/O in Go.

---

Features

1. Data Structure:

   • Defines a Person struct with Name (string) and Age (uint) fields.

2. Create Data:

   • Function CreateData(a []Person):
     • Creates a new JSON file person.json.
     • Writes an array of Person structs to the file in JSON format.

3. Read Data:

   • Function ReadData():
     • Opens and reads the person.json file.
     • Outputs the JSON content to the console.

4. Update Data:

   • Function UpdateData(a []Person):
     • Opens person.json in write mode.
     • Overwrites the existing content with new JSON data from an array of Person structs.

5. Delete Data:

   • Function DeletData():
     • Deletes the person.json file from the filesystem.

6. Main Execution Flow:

   • Creates initial data with two Person entries and writes to person.json.
   • Reads and displays the file content.
   • Updates the data with a new set of Person entries.
   • Reads and displays the updated file content.
   • Deletes the person.json file.

---

How to Run

1. Prerequisites:

   • Install Go (version 1.13 or higher).

2. Setup:

   • Save the provided code in a file named main.go.

3. Running the Application:

   • Open a terminal and navigate to the directory containing main.go.
   • Execute the command:

     go run main.go

   • The application will perform the following steps:
     • Create person.json with initial data.
     • Read and display the content of person.json.
     • Update person.json with new data.
     • Read and display the updated content.
     • Delete person.json.

4. Expected Output:

   • Messages indicating the success or failure of each operation.
   • The content of person.json before and after the update.

---

Technologies Used

• JSON Encoding/Decoding: Utilizes Go's encoding/json package to marshal and unmarshal data.
• File I/O Operations: Uses Go's os and io packages for file handling.
• Standard Library: No external dependencies required.

---