Just 4 Programmers

Are you thinking about designing a printed circuit board? PCBs are quite complicated, and you need to make sure that the layout that you choose is going to operate as well as you want it to. For this reason, we have put together some top tips for PCB design layout. Keep reading if you would like to find out more about this. Leave Enough Space One of the most important design tips for PCB layout is that you need to make sure that you are leaving enough space between the components. While many people might think that packing components closely is the best route to take, this can cause problems further down the line. This is why we suggest leaving extra space for the wires that will spread. This way, you’ll have the perfect PCB design layout. Print Out Your Layout Struggling to find out if your components sizes match? Our next tip is to print out your layout and compare the printed version to your actual components. Datasheets can sometimes come with errors, so it doesn’t hurt to do...

Are you an artistic designer but a little lost in your creative processes? Don’t worry as it happens to all of us so that’s why I decided to write this blog. If you are just starting out on your design career path or just curious for some extra tips then this should give you some needed help. Organize Yourself This is something that all design students should learn to master and take control of their own calendar. If you can prioritize your projects and manage all the different deadlines then this will help in the long run. You will be able to concentrate on being creative and not miss targets later on. There are many great ways to keep track from getting a simple calendar and marking projects and deadlines on it or downloading an app with reminders straight to your phone. Also, a great tip I picked up at Uni was completing boring writing assignments that were getting in the way of my creative time. EssayPro is an essay writing service that I used to finish off my work and left ...

There are so many things to learn before to choose which language is good for Machine Learning. We will discuss each and everything about R as well as Python and the situation or problem in which situation we have to use which language. Let’s start Python and R are the two most Commonly used Programming Languages for Machine Learning and because of the popularity of both the languages Novice or you can say fresher are getting confused, whether they should choose R or Python language to commence their career in the Machine learning domain. Don’t worry guys through this article we will discuss R vs Python for Machine Learning. So, without exaggerating this article let’s get started. We will start it from the very Basics things or definitions. R vs Python for Machine Learning Introduction R is a programming language made by statisticians and data miners for statistical analysis and graphics supported by R foundation for statistical computing. R also provides high-quality graphics and...

I did a blog post many years ago reminding folks that The Internet is not a Black Box . Virtually nothing is hidden from you. The same is true for your computer, whether it runs Linux, Mac, or Windows. Here's something that happened today at lunch. I was testing a local DNS Server (more on this on Thursday) and I started it up...and it didn't work. In order to test a DNS server on Windows, you can go to the command line and run "nslookup" then use the command "server 1.1.1.1" where 1.1.1.1 is the DNS server you'd like to try out. Go ahead and try it now. Run cmd.exe or powershell.exe and then run "nslookup" and then type any domain name. You should get an IP address. Given that I was trying to run a DNS Server on localhost:53 (Port 53 is where DNS usually hangs out, just like Port 80 is where Web Servers (HTTP) hang out and 443 is where Secured Web Servers (HTTPS) usually are) I should be able to do this. I'm trying to send DNS reques...

I recently stumbled upon https://accessibilityinsights.io . There's both a Chrome/ Edge extension and a Windows app, both designed to make it easier to find and fix accessibility issues in your websites and apps. The GitHub for the Accessibility Insights extension for the web is at https://github.com/Microsoft/accessibility-insights-web and they have three trains you can get on: Canary (released continuously) Insider (on feature completion) Production (after validation in Insider) It builds on top of the Deque Axe core engine with a really fresh UI. The "FastPass" found these issues with my podcast site in seconds - which kind of makes me feel bad, but at least I know what's wrong! However, the most impressive visualization in my opinion was the Tab Stop test! See below how it draws clear numbered line segments as you Tab from element. This is a brilliant way to understand exactly how someone without a mouse would move through your site. I can easily s...

Clive Thompson is a longtime contributing writer for the New York Times Magazine and a columnist for Wired and now has a new book out called " Coders ." "Along the way, Coders thoughtfully ponders the morality and politics of code, including its implications for civic life and the economy. Programmers shape our everyday behavior: When they make something easy to do, we do more of it. When they make it hard or impossible, we do less of it." I'm quoted in the book and I talk about how I've struggled with context-switching. Here is TechTarget's decent definition of Context Switching : A context switch is a procedure that a computer's CPU (central processing unit) follows to change from one task (or process) to another while ensuring that the tasks do not conflict. Effective context switching is critical if a computer is to provide user-friendly multitasking. However, human context switching is the procedure we all have to go through to switch...

According to a survey taken of the Scrum Alliance, approximately 70 percent of all groups handling Agile software development believe there are issues present between various internal departments within the company. The fact is, Agile groups work at a much faster pace. In order to mark progress, they use various markets, and in some cases, this puts staff members in direct conflict with each other. The disjunction described above among Agile groups, as well as their peers, is a common mistake in the realm of Agile software development. However, there are a number of other reasons that some Agile projects are unsuccessful as well. You can learn about some of these issues here, and if you have some problems not listed in the article, you can check out DaniWeb software development forum. Knowing what these mistakes are can help you avoid them. Not Using Customer Input There is a large number of groups that don’t pay attention to or use the information that is gathered from their c...

A “key” is one of the most basic and important concepts of the Database Management System (DBMS); the keys helps us work easily with the records and the tables in our database by providing us with the ease of accessing and retrieving the data from the table. A primary key is the first key to be understood as it uniquely identifies the particular record of any table. The primary key and foreign key however, must not be confused with each other as they have a completely different definition as well as usage. Here are the differences between the two. Image Source Difference between Primary Key and Foreign Key S.no. Primary key Foreign key 1 The primary key of a particular table is the attribute which uniquely identifies every record and does not contain any null value. The foreign key of a particular table is simply the primary key of some other table which is used as a reference key in the second table. 2 A primary key attribute in a table can never contain a null value...

Per Wikipedia, "In mathematics , a binary relation ... is transitive if ... element a is related to an element b and b is related to an element c then a is also related to c. " Per Me, if I am cool with you, and you are cool with your friend, then I'm cool with your friend. I've decided this is The Transitive Property of Friendship . As I try to mentor more and more people and help folks Level Up in tech, I'm realizing how important it is to # BeTheLuck for someone else. This is something that YOU can do - volunteer at local schools, forward that resume for your neighbor, give a Warm Intro to a friend of a friend. A lot of one's success can be traced back to hard work and being prepared for opportunities to present themselves, but also to Warm Intros. Often you'll hear about someone who worked hard in school, studied, did well, but then got a job because "their parent knew a person who worked at x." That's something that is hard to re...