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Why to use LSP Scenario: Suppose we have 3 databases (Mortgage Customers, Current Accounts Customers and Savings Account Customers) that provide customer data and we need customer details for given customer's last name. Now we may get more than 1 customer detail from those 3 databases against giv...

Windows Get spigot.jar using BuildTools or from here. Paste the following text into a text document. Save it as start.bat in the same directory as spigot.jar: You will need to rename your jar to spigot.jar, or modify the file in the bat file to point to the correct file. nb: Windows (by ...

public static MvcHtmlString RadioButtonLabelFor<TModel, TProperty>(this HtmlHelper<TModel> self, Expression<Func<TModel, TProperty>> expression, bool value, string labelText) { // Retrieve the qualified model identifier string name = ExpressionHe...

Detailed instructions on getting wpf-controls set up or installed.

The following Less .paragraph{ font-size: 12px; color: darkgrey; background: white; } .special-paragraph{ font-size: 24px; font-weight: bold; color: black; } .parent{ background: lightgrey; .nestedParagraph{ &:extend(.paragraph); &:extend(.special-p...

The following Less div.paragraph{ color: blue; } *.paragraph{ color: green; } .otherClass.paragraph{ color: red; } .paragraph.otherClass{ color: darkgrey; } .parent{ .nestedParagraph{ &:extend(.paragraph); } } Will compile into div.paragraph { colo...

You can establish a transaction by calling the pipeline method on the StrictRedis. Redis commands executed against the transaction are performed in a single block. # defaults to transaction=True tx = r.pipeline() tx.hincrbyfloat(debit_account_key, 'balance', -amount) tx.hincrbyfloat(credit_acc...

In this example the microcontroller echos back the received bytes to the sender using UART RX interrupt. #include "stm32f4xx.h" UART_HandleTypeDef huart2; /* Single byte to store input */ uint8_t byte; void SystemClock_Config(void); /* UART2 Interrupt Service Routine */ void...

By default, NuGet restores packages into the packages folder in the solution root. This folder is shared between all solution projects. In some cases it is useful to change the location of the restored packages (for instance, to share them between several solutions). Its can be achieved by creating...

Add gem 'figaro' to your Gemfile and run bundle install. Then run bundle exec figaro install; this will create config/application.yml and add it to your .gitignore file, preventing it from being added to version control. You can store your keys in application.yml in this format: SECRET_NAME: secre...

Using a Pool Most code will want to connect to Redis using a pool of shared connection objects. Connecting to Redis using a pool involves two different code block. At initialization time, your application needs to create the connection pool: JedisPoolConfig poolCfg = new JedisPoolConfig(); ...

CentOS versions 2 - 5 CentOS version 7 CentOS 7 is fully based on RedHat the detail documentation, examples and system administration guides are located here:CentOS 7 full documention

Local mode In local mode, for example when running your application from an IDE, you can configure log4j as usual, i.e. by making a log4j.properties available in the classpath. An easy way in maven is to create log4j.properties in the src/main/resources folder. Here is an example: log4j.rootLogger...

In case you need different settings for your various applications, there is (as of Flink 1.2) no easy way to do that. If you use the one-yarn-cluster-per-job mode of flink (i.e. you launch your scripts with: flink run -m yarn-cluster ...), here is a workaround : create a conf directory somewhe...

Yarn does not by default aggregate logs before an application finishes, which can be problematic with streaming jobs that don't even terminate. A workaround is to use rsyslog, which is available on most linux machines. First, allow incoming udp requests by uncommenting the following lines in /etc/...

Get-User() Use Verb-Noun pattern while naming a function. Verb implies an action e.g. Get, Set, New, Read, Write and many more. See approved verbs. Noun should be singular even if it acts on multiple items. Get-User() may return one or multiple users. Use Pascal case for both Verb and Noun. ...

There are a variety of ways to validate parameter entry, in PowerShell. Instead of writing code within functions or scripts to validate parameter values, these ParameterAttributes will throw if invalid values are passed. ValidateSet Sometimes we need to restrict the possible values that a paramet...

It's possible to specify several type constraints for generics using the where clause: func doSomething<T where T: Comparable, T: Hashable>(first: T, second: T) { // Access hashable function guard first.hashValue == second.hashValue else { return } // Access compa...

Sometimes you want to switch off all previously registered listeners. //Adding a normal click handler $(document).on("click",function(){ console.log("Document Clicked 1") }); //Adding another click handler $(document).on("click",function(){ console.log(&q...

Note: The Redis project does not officially support Windows. However, the Microsoft Open Tech group develops and maintains this Windows port targeting Win64. Official redis.io/download You can choose to download different versions or the latest version of Redis github.com/MSOpenTech/redis/release...