Tutorial by Examples: o

Installation or Setup

Detailed instructions on getting orchardcms set up or installed.

Smoother loading of items

If the items in your RecyclerView load data from the network (commonly images) or carry out other processing, that can take a significant amount of time and you may end up with items on-screen but not fully loaded. To avoid this you can extend the existing LinearLayoutManager to preload a number of...

Hello World application

To create and run new WPF project in Visual Studio: Click File → New → Project Select template by clicking Templates → Visual C# → Windows → WPF Application and press OK: Open MainWindow.xaml file in Solution Explorer (if you don't see Solution Explorer window, open it by clicking V...

Hello World!

We start with creating an HTML page for the app. There we define the meta tags, a script tag to load the SAPUI5 libraries, and a placeholder for the content of the app. <!DOCTYPE html> <html> <head> <meta http-equiv="X-UA-Compatible" content="IE=edge"...

Show 'Hello World' using the VCL

This progam uses VCL, the default UI components library of Delphi, to print "Hello World" into a message box. The VCL wrapps most of the commonly used WinAPI components. This way, they can be used much easier, e.g. without the need to work with Window Handles. To include a dependency (lik...

Hello World

Create hello.py: from flask import Flask app = Flask(__name__) @app.route('/') def hello(): return 'Hello, World!' Then run it with: export FLASK_APP=hello.py flask run * Running on http://localhost:5000/ Adding the code below will allow running it directly with python hello...

Installation or Setup

Visual Studio can be downloaded and installed for free in Comunity edition from the Microsoft site and can be also found in different versions. Just click on the Download button and run the executable, then follow the instructions.

Do not name a variable with an existing function name

There is already a function sum(). As a result, if we name a variable with the same name sum = 1+3; and if we try to use the function while the variable still exists in the workspace A = rand(2); sum(A,1) we will get the cryptic error: Subscript indices must either be real positive integer...

Installation or Setup

rx-java set up Gradle compile 'io.reactivex:rxjava2:rxjava:2.1.1' Maven <dependency> <groupId>io.reactivex.rxjava2</groupId> <artifactId>rxjava</artifactId> <version>2.1.1</version> </dependency> Ivy <dependency...

Creating a new project in Visual Studio (console application) and Running it in Debug mode

Download and install Visual Studio. Visual Studio can be downloaded from VisualStudio.com. The Community edition is suggested, first because it is free, and second because it involves all the general features and can be extended further. Open Visual Studio. Welcome. Go to File → New ...

Combining selectors

Consider following DOM Structure <ul class="parentUl"> <li> Level 1 <ul class="childUl"> <li>Level 1-1 <span> Item - 1 </span></li> <li>Level 1-1 <span> Item - 2 </span></li&gt...

Basic Loop

for is the only loop statement in go, so a basic loop implementation could look like this: // like if, for doesn't use parens either. // variables declared in for and if are local to their scope. for x := 0; x < 3; x++ { // ++ is a statement. fmt.Println("iteration", x) } //...
Go • Loops

Break and Continue

Breaking out of the loop and continuing to the next iteration is also supported in Go, like in many other languages: for x := 0; x < 10; x++ { // loop through 0 to 9 if x < 3 { // skips all the numbers before 3 continue } if x > 5 { // breaks out of the loop once x...
Go • Loops

Listening for SharedPreferences changes

SharedPreferences sharedPreferences = ...; sharedPreferences.registerOnSharedPreferenceChangeListener(mOnSharedPreferenceChangeListener); private final SharedPreferences.OnSharedPreferenceChangeListener mOnSharedPreferenceChangeListener = new SharedPreferences.OnSharedPreferenceChangeListener(...

Delete a remote branch

To delete a branch on the origin remote repository, you can use for Git version 1.5.0 and newer git push origin :<branchName> and as of Git version 1.7.0, you can delete a remote branch using git push origin --delete <branchName> To delete a local remote-tracking branch: git bra...

Sum, mean, prod & co

Given a random vector v = rand(10,1); if you want the sum of its elements, do NOT use a loop s = 0; for ii = 1:10 s = s + v(ii); end but use the vectorized capability of the sum() function s = sum(v); Functions like sum(), mean(), prod() and others, have the ability to operate ...

Use govendor to add external packages

Govendor is a tool that is used to import 3rd party packages into your code repository in a way that is compatible with golang's vendoring. Say for example that you are using a 3rd party package bosun.org/slog: package main import "bosun.org/slog" func main() { slog.Infof(&quo...

Test flags-style enum values with bitwise logic

A flags-style enum value needs to be tested with bitwise logic because it may not match any single value. [Flags] enum FlagsEnum { Option1 = 1, Option2 = 2, Option3 = 4, Option2And3 = Option2 | Option3; Default = Option1 | Option3, } The Default value is actually a ...

Creating a string that has custom kerning (letter spacing)

NSAttributedString (and its mutable sibling NSMutableAttributedString) allows you to create strings that are complex in their appearance to the user. A common application is to use this to display a string and adding custom kerning / letter-spacing. This would be achieved as follows (where label ...

Method Overloading

Method overloading, also known as function overloading, is the ability of a class to have multiple methods with the same name, granted that they differ in either number or type of arguments. Compiler checks method signature for method overloading. Method signature consists of three things - Met...

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