Search--NIL EXPLANATION | Pixelstech.net

SEARCH KEYWORD -- NIL EXPLANATION

40+ Techniques to enhance your php code

1. Do not use relative paths , instead define a ROOT path Its quite common to see such lines : 1require_once('../../lib/some_class.php'); This approach has many drawbacks : It first searches for directories specified in the include paths of php , then looks from the current directory. So many directories are checked. When a script is included by another script in a different directory , its base directory changes to that of the including script. Another issue , is that when a script is being ru...

PHP,Quirk,Trick,Efficiency,Techniques 2012-04-10 13:06:55

OT Railway System Development: How to Use PLC to Implement Land Based Railway Track Fixed Block Sign

Figure-00: Railway fixed block signaling system over view diagram, version v1.3 (2024) Project Design Purpose: This project aims to use Programmable Logic Controllers (PLC) with train detection sensors and train control signals to develop an automated OT system for railway track fixed block signaling control. The system will include a digital equivalent simulation to explain the logic of the track fixed block Automatic Train Control (ATC) mechanism for demonstration and training purposes. In th...

2024-07-27 04:08:41

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 ...

2024-06-30 02:21:17

A brief guide to tech internships

Planning to be an Intern in the Bay Area during Summer 2012? Make sure to read an Intern's Guide to the Bay Area, and join the 2012 Facebook group. (via this guy, via this guy) Joel Spolsky, from the Joel On Software blog and StackOverflow, wrote an article with Advice for Computer Science College Students back in '05. According to Joel, No matter what you do, get a good summer internship. As such: hereâ€™s everything you ever wanted to know about tech inter...

Internship,Advice,CS student 2012-02-01 04:48:31

True Scala complexity

Update 2: Sorry for the downtime. Leave it to the distributed systems guy to make his blog unavailable. Nginx saves the day.Itâ€™s always frustrating reading rants about Scala because they never articulate the actual complexities in the core language.Understandableâ€”this post is intended fill that gap, and it wasnâ€™t exactly easy to put together. But thereâ€™s been so much resistance to the very thought that the complexity exists at all, even from on up high, that I thou...

Scala,Complexity 2012-01-10 07:17:07

Example on integrating TypeScript with Webpack

TypeScript is now a very popular language to create typed JavaScript code to reduce development error. It provides a type system on top of JavaScript which has only a weak type system. Once the TypeScript code is developed, it can be compiled into corresponding JavaScript so that they can be loaded and parsed by browser. Webpack is another tool for bundling multiple JS files into a single one so that no multiple connections to be established between browser and server. when a page is loaded This...

TYPESCRIPT,WEBPACK,JAVASCRIPT,EXAMPLE 2021-03-13 21:31:29

How to check when an API is introduced in GoLang

Normally people would not pay much attention to which GoLang version is being used as lots of functions are backward compatible. However there are cases where GoLang version does matter as some functions may not be supported by old version of GoLang. For example, strings.Builder is introduced in Go 1.10, but below code would fail to be compiled on Go 1.10. package main import ( "fmt" "strings" ) func main() { var b strings.Builder b.WriteString("polarisxu") fmt.Println(b.Cap()) } The ...

GOLANG,API VERSION,GO TOOL 2021-02-07 00:43:24