Tutorial by Topics: v

Use varnishstat to monitor the numeric metrics of a currently running Varnish instance. It's location will differ based on your installation. Running varnishstat -1 will output all metrics in a simple grep-able format. Other utilities are available for watching varnish current status and logging: v...

https://www.gnu.org/software/emacs/manual/html_node/emacs/index.html#Top

This section provides an overview of what service-worker is, and why a developer might want to use it. It should also mention any large subjects within service-worker, and link out to the related topics. Since the Documentation for service-worker is new, you may need to create initial versions ...

Most of the system models available in Simulink can be implemented using m-files but there are there are some core differences that people prefer to use Simulink. Here we will list som of the advantages of Simulink over m-file simulation. 1- Simulink is Similar to hardware implementation. 2- Simul...

Server Sent Events (SSE) is a unidirectional connection between a server and a client (usually a web browser) that allows the server to "push" information to the client. It is much like websockets and long polling. The main difference between SSE and websockets is that SSE is unidirectiona...

This topic is intended to demonstrate various patterns and practices available to modify base data views in Acumatica.

First introduced in iOS 3.1 as part of the Objective-C runtime, associated objects provide a way to add instance variables to an existing class object (w\o subclassing. This means you'll be able to attach any object to any other object without subclassing. void objc_setAssociatedObject(id o...

Rust 1.15 added (stabilized) a new feature: Custom derive aka Macros 1.1. Now apart from usual PartialEq or Debug you can have #[deriving(MyOwnDerive)]. Two primary users of the feature is serde and diesel. Rust Book link: https://doc.rust-lang.org/stable/book/procedural-macros.html

MessageBox is a simple concept for decoupling entities. For example entity A can place a message that entity B can read whenever suitable. A view controller would like to talk to another view controller, but you don't want to create a strong or weak relationship.

T4MVC is a T4 template that generates strongly-typed helpers for use in MVC Routing mechanisms, as opposed to magic strings. T4MVC will detect the various controllers, actions, and views, and create references to those views, making compile-time errors in the event that an attempt to Route or access...

Selenium webdriver is web automation framework which allows you to test your web application against different web browsers. Unlike Selenium IDE, webdriver allows you to develop your own test cases in programming language of your choice. It supports Java, .Net, PHP, Python, Perl, Ruby.

Reading data in from a csv can be handled in many ways. One solution is to read the csv file into an array. From there you can do work on the array.

Manipulating Regex for IPv4 and IPv6 and replacing by fake IP address in a readed log file

Yii2 has some built-in validators which can be used while solving programming related or general puprose validations. When you need to create a new business logic validation you need to create your own validators.

Whenever you work with video feeds you may eventually want to save your image processing result in a form of a new video file. For simple video outputs you can use the OpenCV built-in VideoWriter class, designed for this. It is useful to look at some concepts before using them. These concepts are co...

In this post I will demonstrate how to pass external data to Angular app before the app bootstraps. This external data could be configuration data, legacy data, server rendered etc.

Elastic Beanstalk is a Cloud PaaS provider (Platform as a Service), meaning applications can be deployed to the platform without the fuss of manually setting up a deployment environment. Java applications are easily deployable to Elastic Beanstalk both via web interface or via command-line tools. ...

A good explanation of this topic is in http://www.sunburst-design.com/papers/CummingsSNUG1999SJ_SynthMismatch.pdf