SEARCH KEYWORD -- Learning list


  Python and PLC Communication

This article provides detailed steps on how to use Python to communicate with Schneider M221 and Siemens S7-1200 PLCs via Ethernet. Additionally, we offer a packaged Python PLC client library, enabling you to easily build your own SCADA control programs, such as Human-Machine Interfaces (HMI). The system overview is shown below: To check the project detail please refer to Python Physical PLC Communication Clients # Created: 2024/06/29 # Version: v0.1.3 # Copyright: Copyright (c) 2024 ...

   PYTHON,PLC,COMMUNICATION     2024-06-30 02:21:17

  Is Java Set ordered or not?

“Is Java Set ordered or not? ” is the most popular question asked when you interview for a Java Developer position. Many fail to answer it, and I have to admit I was one of the many. I have known the answer is “Yes and No” for a long time. No. HashSet is not ordered. Yes.TreeSet is ordered. If the interviewer continues with some follow up questions, I’m not confident that I know the answer then. Why is TreeSet ordered? Are there any other ordered S...

   ORDER,SORTEDSET,HASHSET,JAVA     2021-02-11 06:55:00

  OpenLDAP Proxy -- Tricks and tips

Just like other software configuration, there would be issues encountered during the OpenLDAP proxy setup process. In this post, we would try to summarize some of the tricks and tips for OpenLDAP proxy setup. OpenLDAP Version We would always recommend that you install the latest version of the OpenLDAP because they contain the latest features, bug fixes and security patches. You should always refer to the latest release notes for new changes. In case you have used an earlier version of Open...

   SSL,AUTHENTICATION,OPENLDAP,OPENLDAP PROXY,ATTRIBUTE MAPPING,OVERLAY     2017-11-04 04:29:38

  5 Amazing Firefox Add-ons That Ensure Superior Software Testing

In this rapidly evolving IT world, quality has become the primary parameter to achieve a niche position. The IT professionals are using an array of advanced software testing tools to ensure an excellent quality of the application. And among this set of highly sophisticated software testing tools and techniques, web browser has emerged as one of the simplest, nicest and affordable means which can be easily used, even on a daily basis for testing life cycle of the application. In fact, there is h...

   software testing, web testing     2014-11-25 07:38:51

  New features in Java 9

Java 9 is planned to be released in March 2017. It will be 3 years since Java 8 was released. Are you still excited about the new features introduced in Java 8 such as Lambda, new Date APIs etc? Now Java 9 is to be released and there are also quite a few fantastic new features to be introduced. Below is a list of major new features in Java 9. Modular system. Java 9 will introduce a brand new modular system to organize Java codes. The modular system will divide different packages into diffe...

   JAVA,NEW FEATURE,JAVA 9     2016-04-05 09:56:01

  Top 5 Hot WordPress Social Media Plugins

Social media has become a great need for businesses as well as personal brands in order to carve a vital presence over web. It has become necessary for everyone to have an energetic presence in social networks like Facebook, Twitter, Linkedin, and Youtube etc. Having a great virtual persona, you can be in constant touch with your followers. If you are using a platform like a WordPress then there is a great pool of social media plugins. Some of its plugins are free to download and others are paid...

   Custom WordPress Development     2015-07-10 00:21:57

  The ‘Edge’ in Developing for Android Devices

In today’s times, the consumer is spoiled for choice with the number of options they have with respect to owning mobile device hardware and their operating systems. This diverse availability raises a critical question for both independent developers as well as large app development companies as to which platform to target. Although for larger app development companies, it is possible to simultaneously develop for multiple platforms, it might not be the case for small-scale enterprises. In...

   Android App Development Company, Web Application Development Company, Android App Developers, Web De     2015-08-07 05:36:11

  When will resizing be triggered in Java HashMap?

HashMap is one of the most frequently used collection types in Java, it stores key-value pairs. Ideally it expects to use hash table which expects the data access time complexity to be O(1), however, due to hash conflicts, in reality, it uses linked list or red-black tree to store data which makes the worst case time complexity to be O(logn).  Although collections are using data structures like arrays and linked lists, unlike arrays, they will dynamically resize when there is not enough spa...

   JAVA,RESIZE,HASHMAP,THRESHOLD     2020-05-02 20:41:19

  Some frequently used ES6 code snippets

Below are a list of ES6 code snippets which are used frequently. Hope that it will be helpful. 1. Shuffle array elements let arr = [67, true, false, '55'] arr = arr.sort(() => 0.5 - Math.random()) console.log(arr) // [ '55', 67, false, true ] 2. Remove characters which are not numbers const str = 'xieyezi 23213 is 95994 so hansome 223333' const numbers = str.replace(/\D/g, '') console.log(numbers) // 2321395994223333 3. Reverse sequence or words const sentence = 'xieyezi js so handsome, lol.'...

   JAVASCRIPT,ES6,CODE SNIPPET,TIPS     2022-04-10 07:56:07

  How to choose a jQuery plug-in?

jQuery plug-in provides a good way to save time and simplify the development, programmers don't need to write each component from scratch. However, the plug-in will also be a destabilizing factor in your code library. A plug-in saves countless development time, but a poor quality plug-in will cost more than the actual time to write your own component from scratch. Luckily, usually you have many pls to choose from, but even if you have only one plug-in, you also need to know whether it's worth us...

   jQuery, plug-in     2012-10-27 03:51:40

RECENT