Tutorial by Examples: c

Folder Maker: A Web Script that handles POST

The Hello World Web Script handles GET HTTP methods. But what if you want to create data on the server? For that your web script should handle POST. Here is a simple example that creates new folders in Company Home. It is invoked by making a POST call with a JSON body that looks like: {'name':'tes...

alfresco • Web Scripts

Cluster Example

A single instance of Node.js runs in a single thread. To take advantage of multi-core systems, application can be launched in a cluster of Node.js processes to handle the load. The cluster module allows you to easily create child processes that all share server ports. Following example create the ...

Node.js • Cluster Module

Constructor Injection

interface IService { void ProcessRequest(); } interface IRepository { IEnumerable<string> GetData(); } class HelloWorldRepository : IRepository { public IEnumerable<string> GetData() { return new[] { "Hello", "World" }; } ...

unity-container • Getting started with unity-container

Creating a component from multiple modules

Dagger 2 supports creating a component from multiple modules. You can create your component this way: @Singleton @Component(modules = {GeneralPurposeModule.class, SpecificModule.class}) public interface MyMultipleModuleComponent { void inject(MyFragment myFragment); void inject(MyServic...

Android • Dagger 2

Using QRCodeReaderView (based on Zxing)

QRCodeReaderView implements an Android view which show camera and notify when there's a QR code inside the preview. It uses the zxing open-source, multi-format 1D/2D barcode image processing library. Adding the library to your project Add QRCodeReaderView dependency to your build.gradle dependen...

Android • Barcode and QR code reading

Receiving an event

To receive an event it is necessary to implement a method with the event type as parameter and annotate it using @Subscribe. Furthermore you have to register/unregister the instance of your object at the BusProvider (see example Sending an event): public class MyFragment extends Fragment { pri...

Android • Otto Event Bus

Basic Zero Values

Variables in Go are always initialized whether you give them a starting value or not. Each type, including custom types, has a zero value they are set to if not given a value. var myString string // "" - an empty string var myInt int64 // 0 - applies to all types of int an...

Go • Zero values

More Complex Zero Values

In slices the zero value is an empty slice. var myIntSlice []int // [] - an empty slice Use make to create a slice populated with values, any values created in the slice are set to the zero value of the type of the slice. For instance: myIntSlice := make([]int, 5) // [0, 0, 0, 0, 0] - a s...

Go • Zero values

Struct Zero Values

When creating a struct without initializing it, each field of the struct is initialized to its respective zero value. type ZeroStruct struct { myString string myInt int64 myBool bool } func main() { var myZero = ZeroStruct{} fmt.Printf("Zero values are: %q, %d...

Go • Zero values

Layout Inheritance

A layout is a view file, which is extended by other views which inject blocks of code into their parent. For example: parent.blade.php: <html> <head> <style type='text/css'> @yield('styling') </style> </head> <body> ...

Laravel • Blade Templates

Shortcode introduction

Shortcodes are useful when you want to be able add more complex elements inline into the normal content editor. A shortcode in it's simplest for would look like this: function my_shortcode( ){ return "This is a shortcode"; } add_shortcode( 'my_shortcode', 'my_shortcode' ); It w...

WordPress • Shortcodes

Button shortcode

Here is an example of a simple button short code: <?php function my_button_shortcode( $atts ) { // Parse the input attributes and assgn default values for the // attributes that are not specified on the shortcode $a = shortcode_atts( array( 'id' => '', 'ur...

WordPress • Shortcodes

Using twitter-bootstrap `btn` class

btn class of Twitter-bootstrap can be used with any of the following html elements. anchor button input with both type="button" and type="submit" Below are examples of all possible use cases of btn class <a class="btn" href="#" role="button&qu...

twitter-bootstrap-3 • Buttons in twitter-bootstrap-3

Comments

A tsconfig.json file can contain both line and block comments, using the same rules as ECMAScript. //Leading comment { "compilerOptions": { //this is a line comment "module": "commonjs", //eol line comment "target" /*inline bl...

TypeScript • tsconfig.json

Creating a boolean array

A boolean array can be created manually by using dtype=bool when creating the array. Values other than 0, None, False or empty strings are considered True. import numpy as np bool_arr = np.array([1, 0.5, 0, None, 'a', '', True, False], dtype=bool) print(bool_arr) # output: [ True True False ...

numpy • Boolean Indexing

Function Pointers

Function pointers are the most basic way of passing functions around, which can also be used in C. (See the C documentation for more details). For the purpose of callable objects, a function pointer can be defined as: typedef returnType(*name)(arguments); // All using name =...

C++ • Callable Objects

Classes with operator() (Functors)

Every class which overloads the operator() can be used as a function object. These classes can be written by hand (often referred to as functors) or automatically generated by the compiler by writing Lambdas from C++11 on. struct Person { std::string name; unsigned int age; }; // Func...

C++ • Callable Objects

CheckBox

Checkbox is a control that allow user to get boolean values from user for a spesific question like "Are you ok?". Has a event called CheckedChanged, which occurs whenever the check property is changed. Here is a CheckBox that has a question "Is Checked?". We got this Message...

winforms • Basic controls

Setting up with the CDN

in the index.html, link the CSS from Google CDN <link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/angular_material/1.1.1/angular-material.min.css"> Required dependencies: angular angular-aria angular-animate angular-messages <!-- Angular M...

angular-material • Getting started with angular-material

From simple to complex

Same as, with writing classes - start with the simple cases, then add requirement (aka tests) and implementation (aka production code) case by case: [Test] public void EnsureThat_IsLeapYearIfDecimalMultipleOf4() {...} [Test] public void EnsureThat_IsNOTLeapYearIfDecimalMultipleOf100 {...} [Tes...

unit-testing • Unit Testing: Best Practices