Tutorial by Examples: ci

For this example, we will used 4 bodies and will show only the last 8 bits of the bit masks for simplicity. The 4 bodies are 3 SKSpriteNodes, each with a physics body and a boundary: let edge = frame.insetBy(dx: 0, dy: 0) physicsBody = SKPhysicsBody(edgeLoopFrom: edge) Note that the 'ed...

Interceptors are registered like regular components in Windsor. Like other components, they can depend on another components. With following service for validating credentials: public interface ICredentialsVerifier { bool IsAuthorizedForService(NetworkCredential credentials); } public cl...

Basic identifiers consist of letters, underscores and digits and must start with a letter. They are not case sensitive. Reserved words of the language cannot be basic identifiers. Examples of valid VHDL basic identifiers: A_myId90 a_MYID90 abcDEf100_1 ABCdef100_1 The two first are equivalent ...

using only the for <timeout> clause, it is possible to get an unconditional wait that lasts for a specific duration. This is not synthesizable (no real hardware can perform this behaviour so simply), but is frequently used for scheduling events and generating clocks within a testbench. This e...

Use case: just one action which should return a plain (text) content as-is: public function actionAsXML() { $this->layout = false; Yii::$app->response->format = Response::FORMAT_XML; return ['aaa' => [1, 2, 3, 4]];; } Pre-defined response formats are: FORMAT_HTM...

$BucketName = 'trevorrekognition' ### Create a new AWS S3 Bucket New-S3Bucket -BucketName $BucketName ### Upload two different photos of myself to AWS S3 Bucket Write-S3Object -BucketName $BucketName -File myphoto1.jpg Write-S3Object -BucketName $BucketName -File myphoto2.jpg ### Perform...

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...

You can specify a package where the private value can be accessed. package com.example { class FooClass { private val x = "foo" private[example] val y = "bar" } class BarClass { val f = new FooClass f.x // <- Will not compile f.y // <- Wil...

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...

Let's go through the problem first. Have a look on the code below: public class BankAccount { public BankAccount() {} public string AccountNumber { get; set; } public decimal AccountBalance { get; set; } public decimal CalculateInterest() { // Co...

Here, we try to explain OCP using codebase. First we'll show a scenario that violate OCP and then we'll remove that violation. Area Calculation (OCP violation Code) : public class Rectangle{ public double Width {get; set;} public double Height {get; set;} } public class Circle{ public do...

Scimax is an Emacs starter kit focused on reproducible research, targeted mainly at scientists and engineers. Scimax customizes Org-Mode with features that make cross-referencing, exporting, and coding (in particular Python), simpler. Installation instructions can be found on the landing page of th...

To understand Dependency Inversion Principle (DIP) we need to clear concept about Inversion Of Control(IOC) and Dependency Injection(DI). So here we discuss all about the terms with Dependency Inversion Principle (DIP). Inversion Of Control(IOC) : The control or logic which is not the part of t...

Introduction SRP can be defined as “a class handles only one responsibility”. This is a very short definition for something influential on to the other principles of S.O.L.I.D. I believe that if we get this right, it will have a positive knock-on effect on the upcoming principles, so let’s get star...

Here we give an example of ISP violation and then refactor that violation. Without talking unnecessary things let's jump into the code. ISP violation : public interface IMessage{ IList<string> ToAddress {get; set;} IList<string> BccAddresses {get; set;} string MessageBody {get; s...

&& has precedence over ||, this means that parentheses are placed to evaluate what would be evaluated together. c++ uses short-circuit evaluation in && and || to not do unnecessary executions. If the left hand side of || returns true the right hand side does not need to be evaluate...

Coercion happens with data types in R, often implicitly, so that the data can accommodate all the values. For example, x = 1:3 x [1] 1 2 3 typeof(x) #[1] "integer" x[2] = "hi" x #[1] "1" "hi" "3" typeof(x) #[1] "character" ...

Often you want to lock the entire object while you perform multiple operations on it. For example, if you need to examine or modify the object using iterators. Whenever you need to call multiple member functions it is generally more efficient to lock the whole object rather than individual member fu...

Suppose you had an array: pair = ['Jack','Jill'] And a method that takes two arguments: def print_pair (a, b) puts "#{a} and #{b} are a good couple!" end You might think you could just pass the array: print_pair(pair) # wrong number of arguments (1 for 2) (ArgumentError) Si...

The nil-coalescing operator <OPTIONAL> ?? <DEFAULT VALUE> unwraps the <OPTIONAL> if it contains a value, or returns <DEFAULT VALUE> if is nil. <OPTIONAL> is always of an optional type. <DEFAULT VALUE> must match the type that is stored inside <OPTIONAL>. T...