Tutorial by Examples: a

Seeding Data during migrations

After enabling and creating migrations there might be a need to initially fill or migrate data in your database. There are several possibilities but for simple migrations you can use the method 'Seed()' in the file Configuration created after calling enable-migrations. The Seed() function retrieves...

Entity Framework • Entity-framework Code First Migrations

Hello World - Castle Windsor

class Program { static void Main(string[] args) { //Initialize a new container WindsorContainer container = new WindsorContainer(); //Register IService with a specific implementation and supply its dependencies container.Register(Component.For<ISer...

castle-windsor • Getting started with castle-windsor

OPEN sample, with LINAGE mini report

COBOL ***************************************************************** * Example of LINAGE File Descriptor * Tectonics: $ cocb -x linage.cob * $ ./linage <filename ["linage.cob"]> * $ cat -n mini-report ***********************...

cobol • OPEN statement

CASE

CASE lv_foo. WHEN 1. WRITE: / 'lv_foo is 1'. WHEN 2. WRITE: / 'lv_foo is 2'. WHEN 3. WRITE: / 'lv_foo is 3'. WHEN OTHERS. WRITE: / 'lv_foo is something else'. ENDCASE

ABAP • Control Flow Statements

Multi-threaded TCP Socket Server

When run with no arguments, this program starts a TCP socket server that listens for connections to 127.0.0.1 on port 5000. The server handles each connection in a separate thread. When run with the -c argument, this program connects to the server, reads the client list, and prints it out. The clie...

Python Language • Sockets

Matrix Exponentiation to Solve Example Problems

Find f(n): nth Fibonacci number. The problem is quite easy when n is relatively small. We can use simple recursion, f(n) = f(n-1) + f(n-2), or we can use dynamic programming approach to avoid the calculation of same function over and over again. But what will you do if the problem says, Given 0 <...

algorithm • Matrix Exponentiation

Handling the error - undefined method `where' for #

Sometimes we want to use a where query on a a collection of records returned which is not ActiveRecord::Relation.Hence we get the above error as Where clause is know to ActiveRecord and not to Array. There is a precise solution for this by using Joins. EXAMPLE:- Suppose i need to find all user ...

Ruby on Rails • Rails Cookbook - Advanced rails recipes/learnings and coding techniques

Injecting a dependency manually through XML configuration

Consider the following Java classes: class Foo { private Bar bar; public void foo() { bar.baz(); } } As can be seen, the class Foo needs to call the method baz on an instance of another class Bar for its method foo to work successfully. Bar is said to be a dependency for Foo sin...

spring • Dependency Injection (DI) and Inversion of Control (IoC)

Injecting a dependency manually through Java configuration

The same examples as shown above with XML configuration can be re-written with Java configuration as follows. Constructor injection @Configuration class AppConfig { @Bean public Bar bar() { return new Bar(); } @Bean public Foo foo() { return new Foo(bar()); } } Property in...

spring • Dependency Injection (DI) and Inversion of Control (IoC)

Autowiring a dependency through XML configuration

Dependencies can be autowired when using the component scan feature of the Spring framework. For autowiring to work, the following XML configuration must be made: <context:annotation-config/> <context:component-scan base-package="[base package]"/> where, base-package is th...

spring • Dependency Injection (DI) and Inversion of Control (IoC)

Autowiring a dependency through Java configuration

Constructor injection through Java configuration can also utilize autowiring, such as: @Configuration class AppConfig { @Bean public Bar bar() { return new Bar(); } @Bean public Foo foo(Bar bar) { return new Foo(bar); } }

spring • Dependency Injection (DI) and Inversion of Control (IoC)

Rest Example

Calls to the Metadata API are with HTTP Get: Using Public API Key GET https://www.googleapis.com/analytics/v3/metadata/ga/columns?key={YOUR_API_KEY} Using Access token from either Oauth2 or Service account authentication GET https://www.googleapis.com/analytics/v3/metadata/ga/columns?acces...