Posts

Given a string of parentheses, checking if the parentheses combination is valid is a popular coding interview question. And over the next few minutes, you’ll learn the technique to solve this question and also code up a Python function to validate a given string. What is the Valid Parentheses Problem? Let’s start our discussion by answering the question, what is the valid parentheses problem? A valid parentheses string satisfies the following two conditions: Here are a few examples of valid and invalid parentheses strings....

Windows users have their fair share of problems; black screen of death, blue screen of death, unexpected store exception, and whatnot. A similarly frustrating problem is when your display briefly crashes and wakes up with the message: Display driver nvlddmkm stopped responding and has successfully recovered. This can happen a few times a day to every few minutes, causing interruptions in your routine work. And like with many infamous Windows snags, the exact cause is unknown....

Ansible is one of the most popular configuration administration and infrastructure automation tools. It helps to automate infrastructure configuration/provisioning, software deployments, and general infrastructure management. Ansible was initially available on Linux. However, with Microsoft’s new viewpoint on open source, their community improvements, and their acceptance of a more agile, DevOps-minded software development method, Windows support is gradually catching up with the pace. Although Windows support requires a slight bit more configuration, it’s not very bad once the initial setup is done....

Docker is an open-source project that supports building, testing, deploying, and managing applications in self-sufficient, portable containers. Generally, the container images have all the resources that an application requires to run. Today, Docker has become a popular tool for deploying and managing applications as containers while overcoming compatibility issues. The technology allows you to install the apps and services on a wide range of computers regardless of the underlying hardware and operating systems....

MongoDB, one of the popular NoSQL database, is available for recently released CentOS 8. Let’s check out how to get it installed. Update – if you are looking for production-ready managed MongoDB then you should check out these hosting platforms. Installing on CentOS/RHEL 8 Support for CentOS 8 is available from MongoDB 4.2.1. This means you can’t install the previous MongoDB version, like the 3.x series. So, if you are currently running MongoDB (lower than 4....

The installation will be done using the conda command-line tool built into Anaconda. PyTorch is a machine learning library written in Python and is based on the Torch framework. It was developed by Facebook and is comparable to the likes of Tensorflow by Google. It is useful in the fields of computer vision and natural language processing and has been used by companies such as Tesla to develop autopilot software....

Simply put, it’s like installing an OS (guest) into another OS (host). While this sounds like a typical process, it actually isn’t, at least not with VirtualBox. What is VirtualBox? VirtualBox is free and open-source software developed by the Oracle Corporation. It acts as a hypervisor for the virtualization of x86 and AMD64/Intel64 architecture. This helps create a virtual environment for installing multiple guest operating systems (OSes) onto a single host OS....

If you are a WebSphere administrator and supporting production environment, then one of the challenging tasks is to monitor the important metrics for better control. You can use any monitoring tools which fit your requirement. Here, I will explain how to use Application Manager by Manage Engine for in-depth IBM WebSphere Application Server monitoring. Application Manager is not just for IBM WAS, but it supports many other technologies from a different stream....

ComScore predicts that by 2020 50% of searches will be performed by voice Not only does that mean there will be more opportunity for voice searches, but – equally important – there will be less opportunity for written searchers. Not just that, but the search engines are getting ever more geared towards it. Google has, in effect, been working towards voice-based searches since 2013 when it installed its Hummingbird update....

But, what is WiFi calling? And, how is it useful? In this article, let us explore more about it while also talking about an app, “Hushed,” where you can make calls over WiFi with privacy. Wi-Fi Calling: Explained Wi-Fi calling eliminates the need for a strong cellular network to call someone using the same phone number. It utilizes Voice over WiFi or, more accurately—Voice over Internet Protocol (VoIP) for the calls....

YAML a strict superset of JSON, so anything written in JSON can be parsed to YAML. It’s mostly used for configuration files in projects and it’s super easy to understand and read the code. The file extension for YAML files is .yaml or .yml In this tutorial, we are going to learn about different data types that are present in YAML and work with YAML in Python. By the end of this tutorial, you will be able to understand the YAML and its syntax....

More internet simply translates to more signups, and we keep doing that until our brains fail to remember all those credentials. This leaves us at crossroads: use a password manager or join the crowd using passwords like 1234 or qwerty. Since you’re here, you must belong to the former category. But even someone belonging to the latter division should start using a password manager right away because cybercrimes are only uncommon until they happen to us....

Those days are long gone when users searched online or retail stores for a game they loved to play on PC or PlayStation. In the past, there were fewer options to choose from. Nowadays, there are thousands of game apps. The practice is also true for any other mobile apps like eCommerce, online teaching, messaging, social media, etc. Today apps reach out to all the places where the target audience is, and the best media is ads....

If you are reading this article, it is most likely that you already have hundreds, if not thousands, of photographs taken on your own smartphone or digital camera. If you have been wondering whether there is any way to make money with your photographs, look no further! NFTs or Non-fungible tokens may be the answer to this. If you are a professional photographer, having invested thousands of dollars in Canon, Nikon, Sony, or other leading camera equipment, this may be another way to recoup your investment....

A lot is going on in the competitive VPN market. Privacy people are shouting at you to get a VPN from their rooftops. While suggesting a VPN is easy, only a few understand what actually happens behind the scenes. Stay tuned for my breakdown of HMA VPN with some testing for you to see it through. But you should start from here if you don’t know… What is a VPN?...

In this extensive report, we talk about WordPress usage, security analysis, and performance factors across the most popular websites on the planet. Did you know that there are more than 1.5 billion hostnames in circulation and roughly 180 million active websites? If you love these types of statistics, check out the monthly Web Server Survey report from Netcraft. The survey focuses on monitoring the Web for all active sites and domain names....

eCommerce is on a bull run. It’s comfortable and returns-friendly, making it a fan favorite among everyday folks. While there are many options to build your first online store, few can compete with Shopify. It’s layperson-compatible, has some customizations, and is quick to launch. But it suffers from high transaction fees (unless you use Shopify payments) and has expensive addons. Besides, it’s tough to migrate from Shopify to any other solution....

In this article, we will review these useful tools that enhance rapid and efficient local development. Every time I start to work on an exciting project, I write down on paper or Notion a list of the tools and resources I’ll need to bring an idea into reality. First of all, I make a quick mock-up of the idea I’ll try to build. Then I choose the programming language, framework, or library I’ll use....

But why do you need it after all? It’s because coding, testing, debugging, and project management can become complex, especially if you are working on a large project. And you can’t afford to waste time and welcome inefficiencies because it can disrupt the entire development lifecycle. For this, Java IDEs seem to be helpful. So, let’s discuss Java IDEs more and check out some good options available in the market....

For businesses that run online, keeping a handle on everything seems impossible. You cannot control who visits your website, what kind of ways people are using to fool/break the system, and what customers are saying about it. What you can control (monitor), however, is the content included in the website, be it the code files themselves, the pages and posts, the images and other files stored on the server, and so on....