Tutorial by Examples: en

/* * This design have some major issues * For each new shape added the unit testing * of the GraphicEditor should be redone * When a new type of shape is added the time * for adding it will be high since the developer * who add it should understand the logic * of the Gr...

/* * For each new shape added the unit testing * of the GraphicEditor should not be redone * No need to understand the sourcecode * from GraphicEditor. * Since the drawing code is moved to the * concrete shape classes, it's a reduced risk * to affect old functionallity when new * functionall...

This example is based on spring boot 1.5.1.RELEASE. with the following dependencies: <!-- Spring --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency>...

A simple entity: Using Lombok @Getter and @Setter annotations to generate getters and setters for us @Entity @Getter @Setter public class Message { @Id @GeneratedValue(generator = "system-uuid") @GenericGenerator(name = "system-uuid", strategy = "uuid...

Work in progress

Let's say we want to eliminate duplicated subsequence element from a string (it can be more than one). For example: 2,14,14,14,19 and convert it into: 2,14,19 Using gsub, we can achieve it: gsub("(\\d+)(,\\1)+","\\1", "2,14,14,14,19") [1] "2,14,19" ...

Enum.join(["String1", "String2"], " ") # "String1 String2"

Instead of invoking the Angular’s bootstrap code directly, wrap the bootstrap code into a function and export the function. This function can also accept parameters. import { platformBrowserDynamic } from "@angular/platform-browser-dynamic"; import { AppModule } from "./src/app&quot...

package main import ( "fmt" "k8s.io/client-go/1.5/kubernetes" "k8s.io/client-go/1.5/pkg/api/v1" "k8s.io/client-go/1.5/rest" ) func main() { config, err = rest.InClusterConfig() if err != nil { return nil, err } ...

To get OAuth2 access token simply do curl https://login.salesforce.com/services/oauth2/token -d "grant_type=password" -d "client_id=myclientid" -d "client_secret=myclientsecret" -d "[email protected]" -d "password=mypassword123456" Y...

Use dynamic_cast for converting pointers/references within an inheritance hierarchy. Use static_cast for ordinary type conversions. Use reinterpret_cast for low-level reinterpreting of bit patterns. Use with extreme caution. Use const_cast for casting away const/volatile. Avoid this unless you ar...

Code <picture> <source media="(min-width: 600px)" srcset="large_image.jpg"> <source media="(min-width: 450px)" srcset="small_image.jpg"> <img src="default_image.jpg" style="width:auto;"> </picture> ...

In this example, User Table will have a column that references the Agency table. CREATE TABLE agencies ( -- first create the agency table id SERIAL PRIMARY KEY, name TEXT NOT NULL ) CREATE TABLE users ( id SERIAL PRIMARY KEY, agency_id NOT NULL INTEGER REFERENCES agencies(id) DEFERR...

The following example demonstrates using Lumen in WAMP / MAMP / LAMP environments. To work with Lumen you need to setup couple of things first. Composer PHPUnit git (not required but strongly recommended) Assuming you have all these three components installed (at least you need composer), f...

C++17 The if constexpr statement can be used to conditionally compile code. The condition must be a constant expression. The branch not selected is discarded. A discarded statement inside a template is not instantiated. For example: template<class T, class ... Rest> void g(T &&p, Re...

One good reason to use Filters is for logging. Using this technique a REST call can be logged and timed easily. public class RestLogger implements ClientRequestFilter, ClientResponseFilter { private static final Logger log = LoggerFactory.getLogger(RestLogger.class); // Used for timing...

package com.test.ws.example; import javax.xml.soap.MessageFactory; import javax.xml.soap.MimeHeaders; import javax.xml.soap.SOAPBody; import javax.xml.soap.SOAPConnection; import javax.xml.soap.SOAPConnectionFactory; import javax.xml.soap.SOAPElement; import javax.xml.soap.SOAPEnve...

Nested for loops may be used to iterate over a number of unique iterables. result = [] for a = iterable_a for b = iterable_b push!(result, expression) end end Similarly, multiple iteration specifications may be supplied to an array comprehension. [expression for a = iterabl...

Generator comprehensions follow a similar format to array comprehensions, but use parentheses () instead of square brackets []. (expression for element = iterable) Such an expression returns a Generator object. julia> (x^2 for x = 1:5) Base.Generator{UnitRange{Int64},##1#2}(#1,1:5) Fun...

wire a; wire b; reg q; always @(a) // b missing from sensativity list q = a & b; // In simulation q will change only when a changes In hardware, q will change whenever a or b changes.