Code2night - Latest Programming Blogs & Tutorials

09

Nov

2026

Building a Production-Oriented AI Automation Workflow with Python, FastAPI, and LLMs

Shubham Saini 20 views

A complete engineering guide to building a production-oriented AI automation service with Python, FastAPI, and Pydantic v2. It explores persistent async OpenAI client lifecycle management via ASGI lifespan handlers, prompt segregation, boundary sanitization, constant-time API key security, and semantic HTTP status mapping for upstream provider rate limits and timeouts. Features an automated 14-scenario pytest suite using context-managed test clients and practical production hardening strategies.

09

Nov

2026

Self Healing Test Automation: How CoTester’s AgentRx Helps QA

Shubham Saini 48 views

Development and testing teams today widely use test automation to automate test creation and execution. Sure, this has made testing processes much faster and efficient. But here's a reality check: QA teams using testing frameworks spend at least 20 hours per week creating and maintaining automated tests. Traditional automation test scripts are rigid and highly sensitive to app changes. Even minor UI updates such as renaming a button, can cause the test scripts to fail. As a result, your

21

Jun

2026

Fix Gemini API Error 429: Quota Exceeded on Free Tier (System.InvalidOperationException)

Shubham Saini 1,138 views

Getting System.InvalidOperationException with Gemini API Error 429 (Quota Exceeded) on the Free Tier? You're not alone! This blog explains why this happens, covers free tier rate limits, and shows you how to fix it fast with retry logic, best practices, and tips on using image models in Gemini free tier.

13

Jun

2026

How to Build a Text-to-SQL AI Chatbot with Semantic Kernel and OpenAI in .NET 8

Shubham Saini 1,559 views Watch Video

Step-by-step tutorial to build a natural language to SQL chatbot using Microsoft Semantic Kernel, OpenAI function calling, and SQL Server in a .NET 8 Razor Pages app — with source code, architecture, pros, cons, and performance tips.

13

Jun

2026

Test Blog or whatever title you wnat

Shubham Saini 8 views

Here you have to add the descripion

12

Jun

2026

How to Generate Claude API Key & Setup Billing | Anthropic Claude Tutorial

Shubham Saini 623 views Watch Video

In this tutorial, we walk you through how to generate your Claude API key from the Anthropic Console and set up billing for your account. Whether you're a developer or just getting started with AI, this step-by-step guide makes it easy to get up and running with Claude AI quickly and securely.

12

Jun

2026

How to Boost Your YouTube Channel Performance Easily & Automatically with Claude AI Chrome Extension

Shubham Saini 544 views Watch Video

Growing a YouTube channel takes more than just uploading great content — it also requires ongoing optimization of your video titles, descriptions, and metadata to stay discoverable. But manually reviewing every video on your channel is time-consuming and tedious. What if an AI could do that for you, automatically, right inside your browser? In this tutorial, we show you exactly how to use the Claude AI Chrome Extension to analyze your YouTube channel, identify low-performing videos, and autom

11

Jun

2026

Implementing Two-Factor Authentication (2FA) in ASP.NET Core Identity

Shubham Saini 570 views

This guide provides a comprehensive approach to implementing Two-Factor Authentication (2FA) using ASP.NET Core Identity, enhancing security for web applications. Understanding 2FA is crucial as it adds an additional layer of protection against unauthorized access, thereby mitigating risks associated with credential theft. Familiarity with ASP.NET Core Identity and basic authentication concepts is essential before proceeding with the implementation.

16

Jul

2023

Linked List In Java

Shubham Batra 3,728 views

In Java, the LinkedList class implements the List interface and provides a doubly-linked list data structure. It provides a versatile means of storing and manipulating a collection of items. A LinkedList, unlike an ArrayList, uses references to connect components rather than contiguous memory allocation.

31

Dec

2022

Step-by-Step Guide to Your First C# Program with Examples

Shubham Saini 4,266 views

First C# Program

21

Aug

2023

java.lang.IllegalStateException: The driver executable does not exist

Shubham Batra 5,496 views Watch Video

The java.lang.IllegalStateException with the message "The driver executable does not exist" typically occurs in the context of automated testing using web automation frameworks such as Selenium WebDriver.

16

Mar

2026

Mastering Unit Testing with xUnit in .NET: A Comprehensive Guide

Shubham Saini 437 views

In this blog post, you will learn the essentials of unit testing in .NET using the xUnit framework. We'll cover how to set up xUnit, create tests, and implement best practices to ensure your code is reliable and maintainable.

28

Mar

2026

Mastering List Comprehensions in Python: A Comprehensive Guide

Shubham Saini 338 views

This article delves into the intricacies of list comprehensions in Python, highlighting their syntax, use cases, and best practices. Understanding list comprehensions is crucial for writing concise and efficient Python code, especially when dealing with data transformations. Before diving in, readers should have a basic understanding of Python syntax and data structures like lists and tuples.

26

Feb

2023

How to use Azure Blob Storage in an ASP.NET Core Web API to list, upload, download, and delete files

Shubham Batra 11,631 views Watch Video

How to use Azure Blob Storage in an ASP.NET Core Web API to list, upload, download, and delete files

31

May

2023

App Trim in .NET Core

Shubham Batra 5,181 views

In ASP.NET Core, App Trim refers to a feature that automatically removes unused assemblies from the application's memory during runtime. This helps to reduce the memory footprint of the application and improve its overall performance.

14

Aug

2022

Alphanumeric validation in JavaScript

Shubham Batra 9,627 views

Hello guys, sometimes we need to allow users to type only alphanumeric in the textboxes. For that purpose , we will see how to apply alphanumeric validation in javascript

24

Apr

2026

Integrating HubSpot CRM with ASP.NET Core: Managing Contacts, Deals, and Automating Emails

Shubham Saini 284 views

In this comprehensive guide, readers will learn how to integrate HubSpot CRM with ASP.NET Core applications, focusing on managing contacts, deals, and automating email communications effectively. Understanding this integration is critical for enhancing customer relationship management and improving sales processes. Prior knowledge of ASP.NET Core and basic API interaction will be beneficial for following along.

21

Apr

2026

Debugging Accessibility Issues with Axe: A Step-by-Step Guide in JavaScript

Shubham Saini 300 views

This guide will teach you how to effectively use the Axe accessibility testing tool in JavaScript to identify and resolve accessibility issues in web applications. Accessibility is crucial for ensuring that all users, including those with disabilities, can navigate and interact with your website effectively. Familiarity with JavaScript, web development practices, and basic accessibility concepts will help you get the most out of this tutorial.

10

Sep

2020

Implement Stripe Payment Gateway In ASP.NET

Shubham Batra 59,650 views Watch Video

This tutorial demonstrates how to accept payments with Stripe Checkout in an ASP.NET application built with C# and Web Forms. The application uses Checkout to accept credit cards from the end user and send tokens to a back-end API. The back-end controller uses the Stripe .NET library to create a charge. There are four steps: Create the project and configure dependencies Create the payment Web Form Create a page to perform the charge Run the application

23

Apr

2026

Integrating PayU Payment Gateway in ASP.NET Core: A Comprehensive Guide

Shubham Saini 379 views

This guide provides an exhaustive overview of integrating the PayU payment gateway within an ASP.NET Core application, detailing each step involved in the process. Understanding this integration is crucial for developers looking to implement secure and efficient payment solutions in their applications. Prior knowledge of ASP.NET Core and basic familiarity with payment gateway concepts will be beneficial.

Free Programming Tutorials, Blogs & Developer Tools

Building a Production-Oriented AI Automation Workflow with Python, FastAPI, and LLMs

Self Healing Test Automation: How CoTester’s AgentRx Helps QA

Fix Gemini API Error 429: Quota Exceeded on Free Tier (System.InvalidOperationException)

How to Build a Text-to-SQL AI Chatbot with Semantic Kernel and OpenAI in .NET 8

Test Blog or whatever title you wnat

How to Generate Claude API Key & Setup Billing | Anthropic Claude Tutorial

How to Boost Your YouTube Channel Performance Easily & Automatically with Claude AI Chrome Extension

Implementing Two-Factor Authentication (2FA) in ASP.NET Core Identity

Linked List In Java

Step-by-Step Guide to Your First C# Program with Examples

java.lang.IllegalStateException: The driver executable does not exist

Mastering Unit Testing with xUnit in .NET: A Comprehensive Guide

Mastering List Comprehensions in Python: A Comprehensive Guide

How to use Azure Blob Storage in an ASP.NET Core Web API to list, upload, download, and delete files

App Trim in .NET Core

Alphanumeric validation in JavaScript

Integrating HubSpot CRM with ASP.NET Core: Managing Contacts, Deals, and Automating Emails

Debugging Accessibility Issues with Axe: A Step-by-Step Guide in JavaScript

Implement Stripe Payment Gateway In ASP.NET

Integrating PayU Payment Gateway in ASP.NET Core: A Comprehensive Guide

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