Understanding how to convert temperatures between Celsius and Fahrenheit is a common question in programming interviews. This task tests your ability to work with basic mathematical formulas, handle user input, and implement simple functions efficiently. Let's walk through the problem and look at some example solutions to help you prepare.

How Do You Convert Temperatures Between Celsius and Fahrenheit?

Creating an accurate and well-structured proposal is a critical step in securing software development projects. A common challenge is estimating the labor effort — how many developers will be needed, for how long, and what the total cost will be. Clients often look for justification behind team size and timeline. This guide outlines a practical approach to estimating labor for software projects, using a realistic example, and shows how to explain your estimate when it differs from the client’s expectations.

Estimating Developer Needs and Labor Cost in Software Projects

When working with linked lists in programming, it’s common to encounter scenarios where you need to print the elements starting from the last node back to the first. This task becomes interesting especially when dealing with an immutable linked list — a list where nodes cannot be modified after creation. Unlike mutable lists, you cannot simply change pointers, which means your approach must respect the immutability.

How Can You Print an Immutable Linked List in Reverse?

Understanding how to calculate the score of a string is a common question in tech interviews, especially for roles involving programming, data manipulation, or algorithm design. In most cases, the score of a string refers to a value derived from its characters based on certain rules. One typical example is assigning scores to characters based on their positions in the alphabet and then summing those scores. This type of problem helps demonstrate your ability to work with strings, loops, and basic ASCII values.

How to Calculate the Score of a String?

Many gamers are curious about new hardware that might improve their experience. Recently, AI chips have become popular in different fields. Some wonder if these chips can be used to play 3D video games. This article explains what AI chips are and whether they can help enhance 3D gaming.

Can You Use AI Chips to Play 3D Games?

Writing functions in Node.js is a fundamental skill that helps in building efficient and organized code. Functions allow you to reuse code, break complex tasks into smaller parts, and make your scripts easier to understand and maintain. In this article, you will learn how to write functions in Node.js, with clear examples to guide you.

How Do You Write a Function in Node.js?

In many programming interviews, you might encounter questions involving subsets of an array or list of numbers. One common problem is to find the sum of XOR values of all possible subsets of a given array. Understanding how to approach this problem efficiently is important, especially when the input size grows large.

How to Calculate the Sum of All Subset XOR Totals

Creating a landing page quickly and efficiently is important for many online projects, marketing campaigns, and product launches. Using AI tools can help streamline this process. This article will guide you through simple steps to use AI for designing and writing a landing page, with practical code examples to make the task easier.

How Can You Use AI to Design and Write a Quick Landing Page?

Many users wonder whether modern web browsers have a built-in speech-to-text feature they can access and use in their own web projects. The good news is that most popular browsers do support speech recognition technology, which allows users to convert spoken words into text directly within a web application. This article explains how this feature works and provides simple code examples to help you integrate speech-to-text into your websites.

Does the browser have a built-in speech-to-text feature?

Wildcard pattern matching is a common problem in programming and is often asked in technical interviews. It involves checking if a given string matches a pattern that includes special characters, typically `?` and `*`. The `?` wildcard matches any single character, while the `*` wildcard matches any sequence of characters, including an empty sequence. Understanding how to implement this efficiently is valuable as it tests your ability to handle string manipulations, dynamic programming, and algorithmic thinking.

How Do You Implement Wildcard Pattern Matching?

When preparing for a tech interview, understanding classic problems like the Jump Game is essential. Many interviewers ask about this problem because it tests your ability to handle greedy algorithms, dynamic programming, and array traversal techniques. In this article, I will explain what the Jump Game problem is, how to approach it, and will include clear code examples for solving it efficiently.

How Do You Solve the Jump Game?

If you're building a serious product and want full ownership of your lead gen experience, building your own chatbot with a JSON-driven engine is a no-brainer. It’s lightweight, flexible, and future-proof — and once set up, can be just as easy to manage as any no-code tool.

How to Build a Lead Generation Bot Without a Chatbot Builder

Apple's Liquid Glass UI, unveiled at WWDC 2025, promises to redefine user interfaces with its stunning depth and responsiveness. As front-end developers, we immediately took on the challenge: how closely can we recreate this beautiful, dynamic effect using only HTML, CSS, and JavaScript on the web?

Apple’s “Liquid Glass” is Here, and We Tried to Recreate It for the Web

Regular Expression (Regex) Matching is a common topic in technical interviews for software engineering roles. Interviewers often ask candidates to explain how regex matching functions or to implement regex matching from scratch. Understanding how regex matching works is key to solving many pattern searching problems efficiently. This article explains the core concepts behind regex matching, illustrates with clear examples, and provides a simple code implementation.

How Does Regular Expression Matching Work?

In recent years, large language models (LLMs) have become a significant part of many technology applications. These models can understand and generate human-like text, making tasks like customer service, content creation, and data analysis easier. But as these models grow more powerful, issues around privacy and data security also come into focus. This is where local large language models are starting to make a difference, creating fresh chances for businesses that prioritize privacy.

How Do Local Large Language Models Open New Opportunities for Privacy-Focused Businesses?

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?

Software-as-a-Service (SaaS) is a popular way for companies to offer software solutions. It provides users with access to applications stored online, often on a subscription basis. Many businesses are interested in understanding the different ways to generate revenue from SaaS products. This article covers some common SaaS business models that companies use to grow and succeed.

What Are the Possible Business Models in SaaS?

Creating web applications can be done with many programming languages and frameworks. Python and Node.js are two popular choices for building server-side applications. Both have unique features and strengths, making them suitable for different types of projects. This article compares Python and Node.js server frameworks to help you choose the right one for your needs.

What Are the Main Differences Between Using a Python or Node.js Server Framework?

Planning a successful software project extends far beyond the scope of writing code. It demands a meticulous financial strategy that accounts for all costs over the project's entire lifecycle. These expenditures are broadly classified into two fundamental categories: upfront Capital Expenditures (Capex) and ongoing Operational Expenditures (Opex). A thorough understanding of both is paramount for organizations to forecast budgets with precision, make informed strategic decisions, and ultimately ensure the project's long-term viability.

The Critical Role of Upfront Capex and Ongoing Opex in Software Development

Many people use large language models for different tasks. Sometimes, they want the AI to respond in a specific language. A common question is whether it’s better to write the entire prompt in that language or keep it in English and ask the AI to answer in a foreign language. This article will help you decide what approach might work best.

Should I Write a Prompt to an LLM in a Foreign Language?

Vocal backchannels are small sounds or words that listeners use during a conversation to show they are paying attention, understanding, or encouraging the speaker. These sounds are often unnoticed but are very important in communication. They help keep conversations flowing smoothly and make speakers feel heard and supported.

What Is a Vocal Backchannel?

When displaying text on a new system, especially content written in less widely used languages, characters may appear broken, garbled, or replaced with question marks. This often happens due to encoding mismatches. UTF-8 is a widely used character encoding standard designed to handle text from any language and is now the default format for most modern platforms and applications. Ensuring that your files are saved and read using UTF-8 helps avoid these issues.

UTF-8 Display Issues on New Systems and How to Fix Them

Building a reliable Retrieval-Augmented Generation (RAG) system is important for creating accurate AI solutions. RAG combines the strengths of information retrieval with language models to provide better responses. However, getting consistently high accuracy requires careful setup and ongoing effort. This article outlines practical ways to improve the accuracy of RAG search operations.

How Can You Improve the Accuracy of RAG Search in an AI Solution?

Programming is about solving problems efficiently. Developers aim for simple, clear, and effective code. But when AI tools are involved, the solutions often become more complex than needed, and the suggestions can seem unnecessary or confusing. This article explores why AI in programming tends to make things more complicated and how that impacts developers.

Why does AI in programming tend to overcomplicate solutions and suggest unnecessary changes?

Virtual telephone systems have become common tools for businesses that need flexible communication options. These systems allow companies to set up local or international phone numbers without owning physical lines in each country. This article explains how virtual phone numbers work and why companies like Twilio and Infobip can offer such a wide variety of numbers worldwide.

Why virtual telephone companies can sell so many phone numbers from different countries

When you are looking for a specific product on a website, you expect to find it quickly. You type in what you want, and the website shows you a list of items. For a long time, this process was straightforward. A simple search for red shoes would show you red shoes. Now, many sites are using artificial intelligence to help with searches. While this can sometimes be helpful, it can also lead to results that are not as accurate as the old-fashioned way. This article will explain why a direct search query can still be more reliable.

Why is AI search sometimes less accurate than a simple search?

An iframe is a simple tool in web development that can make websites more interactive and flexible. If you browse the internet daily, you have probably used a website with iframes, even without knowing it. This article will explain what an iframe is, how it works, and why web developers choose to use it.

What is an iframe and Why Do We Use It?

Choosing the right framework is critical in backend development. If you're working with Python and looking to build modern, high-performance APIs, FastAPI is gaining strong traction — but how does it stack up against the veteran Django? This article introduces FastAPI, shows a simple example, and then compares it to Django in terms of speed, architecture, and ideal use cases.

Is FastAPI the Better Choice over Django for Your Next Python Project?

Ever wonder whether to use traditional search or a fancy AI like RAG for finding info? While RAG offers quick, conversational answers by synthesizing information, it's not always the best. For precise data like product IDs or prices, classic search is king because it points you directly to the source, ensuring accuracy. Use RAG for general questions and summaries, but stick to search when accuracy is non-negotiable!

RAG vs. Search: Which AI Tool Should You Use to Find Information?

Retrieval Augmented Generation (RAG) offers a powerful way to enhance large language models (LLMs) by providing them with external information. This approach directly addresses questions about context window limitations and the number of documents a system can handle. A frequent question for developers and businesses building AI applications is whether a practical limit exists for the number of documents RAG can search.

RAG Systems and Document Limits: Is There a Ceiling?

Employee training is a key part of running a successful business. It helps workers learn new skills, stay updated with changes, and improve performance. Traditional training methods like classroom sessions or printed manuals can be time-consuming and sometimes ineffective. Artificial Intelligence (AI) offers a fresh way to improve training programs. It can make learning more engaging, flexible, and personalized. This article will explain why AI is beneficial for employee training.

Why is AI Good for Employee Training?

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.

The AskHandle Blog

What Are the Possible Business Models in SaaS?