One common question in technical interviews, especially for roles related to algorithms and data structures, is the "Trapping Rain Water" problem. This problem tests your understanding of arrays, two-pointer techniques, and your ability to optimize solutions for efficiency. In this article, we'll go over what the problem involves, an efficient approach to solving it, and a clean code example to help you prepare.

How Do You Solve the Trapping Rain Water Problem in Coding Interviews?

Many developers face the challenge of updating older JavaScript code that uses callback functions to modern Promise-based syntax. This change improves code readability, simplifies error handling, and makes it easier to work with asynchronous operations. In this article, you'll learn how to convert callback-based functions into Promise-based functions, with clear examples to guide you through the process.

How Do I Convert a Callback-Based Function to a Promise in JavaScript?

AI agents are quickly emerging as the centerpiece of the next phase in generative artificial intelligence, drawing major investment from leading technology companies. Unlike earlier AI models that primarily generated content or answered questions, these agents are designed to perform complex tasks autonomously, requiring minimal human intervention.

Are AI Agents the Next Frontier in Generative Artificial Intelligence?

Marketing has been around for a long time. It involves reaching out to people to tell them about products or services. Recently, artificial intelligence (AI) has started to change how marketers work. This article will explain how AI is helping traditional marketing become more effective and easier.

How is AI Helping Traditional Marketing?

AI tools have become a common part of our lives. They help with daily tasks, answer questions on many topics, and give recommendations. This leads to a new question: Should AI be allowed to answer medical questions? Let’s look at the different sides of this topic.

Can AI Be Allowed to Answer Medical Questions?

Customer support is a key part of any business. It helps keep customers happy and builds loyalty. In recent years, artificial intelligence (AI) has changed how companies handle customer support. AI makes support faster, more accurate, and available around the clock. This article explains how AI is transforming customer support and what benefits it brings to businesses and customers alike.

How Is AI Powering Customer Support?

When working with JavaScript arrays, one common question is: What is the maximum index an array can have? Understanding the upper bounds of array indexes is important, especially when dealing with large datasets or performance-sensitive applications.

What is the maximum index in a JavaScript array?

Large Language Models are powerful tools that can interpret and create human-like text. A common question is whether these models can directly access and query information stored in a SQL database. The answer is yes, with the right approach and engineering setup.

How can a Large Language Model search through a SQL database?

When working with JavaScript, a common task involves combining two arrays into an object. This often arises when you have one array containing keys and another containing corresponding values. Knowing the right method to do this efficiently can make your code cleaner and more effective. In this article, we will explore straightforward ways to create an object from two arrays, with clear examples to help you understand the process.

How can I create an object from two arrays in JavaScript?

When working with JavaScript, understanding how functions handle the `this` keyword is essential. One common question that often arises during technical interviews is: how does the `bind()` function help to set or change the context (the value of `this`) inside a function?

How does the bind() function work to set the context in JavaScript?

Many people interested in creating or using AI chatbots wonder whether they must have a website to access or deploy these intelligent systems. The answer is no; you do not need a website to use an AI chatbot. There are several ways to interact with or deploy AI chatbots without a dedicated website. Let’s explore how you can do this and look at some simple code examples to understand the process better.

Do You Need a Website to Use an AI Chatbot?

When working on projects that involve calendars, scheduling, or date management, you often need to generate a list of dates within a specific range. For example, creating a list of all days between two dates, such as from January 1, 2024, to January 10, 2024. This is a common requirement in many JavaScript applications, whether you're building a booking system, a calendar view, or data analysis tools.

How can I generate a range of dates in JavaScript?

When working with software development, you often hear the term API. APIs are a way for different software systems to communicate with each other. There are several types of APIs, each suited for different use cases. Understanding the common APIs protocols and how they differ can be very helpful in both development and choosing the right tool for your project. There are four main types of API protocols widely used today: REST, SOAP, GraphQL, and gRPC. Each has its own design principles, use cases, and strengths.

How Many Types of APIs Are There and What Are Their Differences?

When working with JavaScript, especially in projects involving configurations or complex data structures, you often need to combine two objects into one. Sometimes, a simple merge that overwires properties at the top level isn’t enough. Instead, you need to merge objects deeply, combining nested objects as well. This is a common question during technical interviews because deep merging involves understanding recursion, object handling, and sometimes third-party libraries.

How can I deeply merge two objects in JavaScript?

When working with data in web development, you often encounter scenarios where information is stored or transmitted as a JSON string. To manipulate this data effectively in your JavaScript code, you'll need to convert the JSON string into a JavaScript object. This common task is essential for processing data received from APIs, reading configurations, or handling user input.

How to Convert a JSON String to an Object in JavaScript?

When working with arrays in JavaScript, it's common to need a way to cycle through elements repeatedly, creating a circular pattern. This is useful in many scenarios, such as rotating banners, round-robin scheduling, or repeating sequences in animations. One common question in tech interviews is how to generate or access an array in a circular way, especially when the index exceeds the array length.

How can I generate a circular array of values in JavaScript?

Many software applications today offer Application Programming Interfaces, or APIs. These APIs allow different programs to talk to each other. Connecting these APIs can create powerful automated workflows. But making these connections directly often requires a lot of technical work. API layer services simplify this process.

How Do API Layer Services Connect Diverse Systems So Easily?

Running an outbound SMS campaign can be a quick and effective way to reach your customers. However, it's important to know the rules and regulations in the United States before you start sending mass text messages. Many businesses wonder if they can send SMS messages freely. The answer is yes, but with certain rules to follow. This article explains what you need to know about outbound SMS campaigns in the USA.

Are You Allowed to Do Outbound SMS Campaign in the USA?

When planning travel, issues with bookings, or questions about flights, contacting the customer service team of CheapOair Canada can help resolve your concerns efficiently. As a reputable online travel agency, CheapOair offers multiple ways for customers in Canada to get assistance. Here, we will outline the most accurate and reliable methods to reach their customer support team.

How to Contact CheapOair Canada Customer Service

If you are a customer in Canada seeking assistance from Flair Airlines, understanding how to efficiently reach their customer service is essential. Whether you have questions about flight bookings, cancellations, refunds, baggage policies, or other travel-related concerns, contacting the right support team can help resolve your issues promptly. This article provides accurate and reliable information on how to contact Flair’s customer service in Canada.

How to Contact Flair Customer Service in Canada

Planning a trip to Europe often involves seeing beautiful sights, trying new foods, and experiencing different cultures. But have you ever wondered who the stars behind the scenes are that make a European vacation movie or story so memorable? Let’s take a look at the main cast members, both the actors playing travelers and the characters they bring to life, as they journey through Europe’s most famous destinations.

Who Are the Main Cast Members of the European Vacation Movie?

Many people and businesses store huge amounts of information in PDF files. Searching through these files can be slow and frustrating, especially when looking for specific answers. Generative AI has made it much easier to search and understand PDFs. But how does it actually work?

How Can AI Search Through and Understand Your PDF Files?

If you are traveling with Cathay Pacific or need assistance with bookings, flight information, or other concerns while in Canada, knowing how to reach their customer service is essential. Cathay Pacific is a major international airline based in Hong Kong, and they provide various channels for customer support to ensure passengers and travelers receive the help they need promptly and efficiently.

How to Contact Cathay Pacific Customer Service in Canada

Connecting with Avianca’s customer service team is an important step for travelers needing assistance with their flights, reservations, or other airline-related inquiries. Whether you are planning a trip, facing an issue with a booking, or seeking information about their services, Avianca provides multiple ways to reach their support team to ensure a smooth experience.

How to Contact Avianca Customer Service

Reaching out to customer service is an essential step whenever you need assistance with your banking needs, whether it's a question about your account, a technical issue, or general inquiries about BMO (Bank of Montreal) Canada. Fortunately, BMO offers multiple channels to connect with their support team, making it accessible and convenient for customers across the country.

How to Contact BMO Canada Customer Service

AI, especially language models, often prompts questions about how they generate responses. One common question is whether AI models send their replies all at once or token by token. This article explains how AI models produce text responses and clarifies whether the process involves sending responses one piece at a time.

Does AI Send Response Token by Token?

Tourism is a vital part of many local economies. It brings visitors, creates jobs, and supports small businesses. Recently, artificial intelligence (AI) has become a tool that can help boost local tourism in many ways. This article will explain how AI can make a difference for tourist destinations and improve visitors’ experiences.

How Can AI Help Local Tourism?

Creating the front end of an Android app involves designing the user interface (UI) and making it interactive for users. This article will guide you through the basic files you need and how to edit or create them to build a simple, functional front end for your Android application.

How to Code the Front End of an Android App?

Many people wonder if it's possible to run a website without relying on cloud servers. With more options than ever, understanding how websites operate and what alternatives exist can help you decide what best suits your needs. The good news is, a website can function without cloud servers, but there are important factors to consider.

Can a Website Run Without Using Cloud Servers?

Creating software without relying on cloud services is possible, but it has some important considerations. Many developers think about using cloud platforms for ease and scalability, but it is not a requirement. You can build, run, and maintain software entirely on your own hardware. This article explains how to build software without cloud services and the pros and cons of such an approach.

Can I build a software without using any cloud services?

Many users wonder how ChatGPT, an AI language model, can tell the current date. Since ChatGPT does not have a real-time clock or direct access to the internet during conversations, it seems confusing how it provides date-related information. In this article, we will explain how ChatGPT can know today’s date and how it manages to give accurate answers about the current day.

How Can ChatGPT Know Today's Date?

When you're building an app that sells goods or services, choosing the right payment system is critical. One common question developers ask: Can I use third-party payments like Stripe inside my app? Let’s break down the current policies of Apple’s App Store and Google Play Store in 2025.

Can I Use 3rd Party Payments for Selling Digital Goods in Mobile Apps?

Creating a website similar to Facebook can be a significant investment. It involves many different components, from design and development to infrastructure and ongoing maintenance. Understanding the general costs involved helps to plan better. This article breaks down the main expenses involved in building a social networking website like Facebook.

How much does it cost to build a Facebook website?

Many developers ask whether it is possible or practical to create software without relying on open source libraries. The idea of building everything from scratch sparks curiosity about the advantages, challenges, and realistic possibilities involved in such an approach. This article explores these questions in detail to help you understand what it takes to write software without open source tools.

Can I Write Software Without Using Any Open Source Libraries?

Coinbase is one of the most popular and widely used cryptocurrency exchanges globally, known for its user-friendly platform and reliable services. However, like any digital platform, users may occasionally encounter issues that require direct assistance from Coinbase’s customer support team. If you're seeking to contact Coinbase customer support, it's important to know the official and accurate methods to do so to ensure your inquiries are handled securely and effectively.

How to Contact Coinbase Customer Support

HDFC Bank is one of India's leading banking institutions, offering a wide range of financial products and services to customers across the country. As a banking customer, you may need assistance with various issues such as account inquiries, debit/credit card support, loan services, or internet banking help. Knowing how to contact HDFC Bank’s customer support efficiently can save you time and provide you with the assistance you need promptly.

How to Contact HDFC Bank Customer Support

Businesses today often seek ways to use artificial intelligence to improve their work. An enterprise AI solution is AI technology specifically built and used within a company to solve its unique problems and make its operations better. This is different from general AI tools you might find for personal use.

What is an Enterprise AI Solution and What Does it Look Like?

Creating an AI-powered coding assistant editor means blending a robust text editor with intelligent AI capabilities. You'll be leveraging various coding tools and designing a seamless user experience. Here's how you can approach this exciting project.

Roadmap to Build Your Own AI Coding Assistant Editor

Building applications once required a lot of specific knowledge and time. Today, AI tools are changing how people write code and create software. These tools make the work quicker and simpler for many.

Is AI a Great Coding Assistant?

Large Language Models (LLMs) are powerful tools that can generate text, answer questions, and provide suggestions. They have become popular for helping with many tasks. But when it comes to making decisions, they often fall short. LLMs tend to stop at offering advice or give random answers instead of making clear choices. This article explains why that happens.

Why Can’t LLMs Make Decisions for You?

Running a large language model (LLM) locally can be appealing for some organizations, but it also comes with significant costs. Without relying on cloud services, the expenses primarily fall into hardware, electricity, maintenance, and operational staff. This article breaks down the main costs involved in running an LLM locally.

What Are the Biggest Costs of Running a Large Language Model Locally?

The arrival of downloadable large language models (LLMs) that run directly on personal devices or local servers is changing how AI can be used. Unlike cloud-based AI services, these local LLMs operate without needing constant internet access, giving users and businesses new levels of control, privacy, and flexibility. This shift opens up fresh opportunities for developers and companies to build smarter, faster, and more customized AI-powered solutions.

Why Downloadable Large Language Models Can Be the Next Big Thing in AI

Software development kits, or SDKs, are important tools for programmers. They help create applications faster and with less effort. SaaS companies often provide SDKs to make their services easier to use and integrate.

What Is an SDK and Why Do SaaS Services Offer Them?

The competition over AI between the United States and China has entered a critical new phase, marked by a shift from purely technological rivalry to a broader contest over global influence, standards, and digital infrastructure. This competition now extends far beyond the development of AI models alone, encompassing control over AI adoption, regulatory frameworks, and the architecture of worldwide digital ecosystems.

What Is the New Frontline of AI Battle Between Major Economies?

Large language models (LLMs) are growing in power, but they still have clear limits. One of these is their context window—the chunk of text or tokens they can handle at one time. This article explains what a context window is, which models support the largest ones, and what to do if your input is too long.

What Is the Context Window for the Latest LLMs and What If My Text Is Longer?

Digital contracts are everywhere—from employment offers and lease agreements to business deals. They’re fast, convenient, and legally enforceable—if used correctly. But before you click Sign, it's important to understand the legal and technical foundations that make digital signatures valid—and the risks you need to avoid.

What You Need to Know Before Signing a Digital Contract

There’s a persistent image of the zealous startup founder, fueled by coffee and determination, whose dedication is absolute. This often includes the romanticized notion of sleeping at the office. It's often presented as the ultimate sign of commitment, proof of dedication, and an indicator that the company, especially a startup, is thriving. But does sleeping at the office truly serve as good leadership? And does it truly impress investors or signal a healthy, growing company?

Sleeping at the Office: A Sign of Strength or Strain?

Recently, the tech world buzzed with the revelation that Anthropic's Claude 3 model uses a system prompt estimated to be around 24,000 tokens long. For context, that's equivalent to approximately 22,600 words. Forget a single sentence; this is a meticulous, multi-page operating manual for an AI. So, why would an AI need such an exhaustive set of instructions, and what does it mean for performance, cost, and the way you interact with these powerful models? Let's explore.

The Secret Life of AI System Prompts

Ever wonder how different online services talk to each other securely? Or how an app on your phone can pull data from a popular website without you logging in every single time? The answer often involves something called an API token.

What is an API Token?

We use software for nearly everything these days – from waking up to winding down, it's there. The apps on our phones, the websites we visit, the programs on our computers. They’re tools. And like any tool, how they feel to use makes a huge difference.

The Real Feeling of Good Software

In Origin (2017), Dan Brown introduced Winston, an AI assistant with charm, wit, and startling independence. At the time, it felt like a futuristic fantasy. But in 2025, with tools like ChatGPT and generative AI transforming everyday life, Winston seems eerily familiar. So how close is today's AI to Brown’s fictional vision?

When Fiction Meets Reality: Dan Brown’s Origin and the AI Future That’s Already Here

Developing web applications involves choosing how your code runs. Two popular methods are server-based hosting and serverless computing. This article will show you the differences, using Node.js projects on Heroku (server-based) and Vercel (serverless) as direct examples.

What is Serverless Computing and How Does It Compare to Traditional Servers?

When working with modern web applications, you often hear about APIs and how they help different software systems communicate. One of the most common types of APIs used today is called REST API. If you’re preparing for a tech interview or just want to understand how web services operate, understanding what a REST API is and why it’s useful can be very helpful.

What is a REST API and Why Is It Useful?

Pay-per-click (PPC) advertising is a popular online marketing strategy where businesses pay a fee each time their ad is clicked. It allows companies to appear prominently in search engine results or on social media platforms, targeting users actively searching for specific products or services. But which types of businesses benefit the most from PPC campaigns? Understanding this can help you prepare for tech interviews and craft effective digital marketing strategies.

What Types of Businesses Are Best Suited for Pay-Per-Click Advertising?

Unsupervised learning is a type of machine learning where a computer system learns from data without being given specific instructions on what to look for. Unlike supervised learning, where models are trained on labeled data, unsupervised learning deals with data that has no pre-existing labels or categories. This allows the system to discover patterns, groupings, or structures in the data all on its own.

What is Unsupervised Learning in AI?

A proxy server is a tool used on the internet to act as a middleman between your computer and the websites you visit. It can offer several benefits, but it also comes with some drawbacks. This article explains what a proxy server is and whether using one is a good idea.

What is a proxy server, and is it the best practice to use one?

Large language models, or LLMs, are AI systems that work with human language. They can write stories, answer questions, and translate text. For these models to do their job, they need a special way to process words. This is where embeddings come into play. Embeddings are a key part of how these AI systems make sense of language.

What are Embeddings and How Do They Help AI Process Words?

Building a chat widget? You’ll need to decide how messages get sent and received—WebSockets or REST API. One is real-time and always connected. The other is request-based and easier to manage.

WebSockets vs REST API for Chat Widgets

Pop figures, also called Funko Pops, have become one of the most popular collectibles today. Young people love collecting these small, cute statues of their favorite characters from movies, TV shows, games, and more. But what makes these figures so appealing to the new generation? Let’s take a look at the main reasons behind their popularity.

Why Are Pop Figures So Popular Among the New Generation?

Many users wonder what happens to their photos on Google Photos if they decide to stop paying for the service or cancel their subscription. This article explains what occurs, including the timeline and what you can do to keep your pictures safe.

Will You Lose All Photos in Google Photos If You Stop Paying?

In today’s hyper-connected world, how we message each other says a lot about our culture, devices, and even our age group. While social apps come and go, certain platforms dominate personal communication in the United States. If you're curious about what Americans are using to stay in touch — especially for person-to-person messaging — here’s a breakdown of the top personal communication channels in 2025.

Top Personal Communication Channels in the U.S. (2025 Edition)

Practicing your sales pitch is key to closing deals and building strong relationships with clients. Traditionally, this involves rehearsing in front of mirrors, recording yourself, or practicing with colleagues. Now, artificial intelligence (AI) offers new ways to make this process more effective and engaging. These tools help you prepare, refine, and perfect your pitch so you can communicate more confidently and clearly.

How Can You Use AI to Practice and Improve Your Sales Pitch?

Using artificial intelligence (AI) tools has become common for many tasks today. They can help write, answer questions, analyze data, and much more. But to get the best results from these tools, the way you ask your questions — called the "prompt" — matters a lot. A clear and well-phrased prompt ensures AI understands what you need and gives accurate, useful answers. In this article, we will explore why clear prompts are so important and how they can improve AI performance.

Why Is a Clear Prompt Important to Improve AI Performance?

Foreign software plays a major role in business and daily life. With global trade tensions and new tariffs in 2025, many are asking: will foreign software be subject to tariffs? The answer is more complex than it first appears. This article explains how tariffs work, why software is treated differently from physical goods, and what recent changes mean for companies and consumers.

The AskHandle Blog

What is an Enterprise AI Solution and What Does it Look Like?