Tutorial by Examples: ga

const md = Rx.Observable.fromEvent(document, 'mousedown').map(true); // `md` will emit `true` whenever the mouse is pressed const mu = Rx.Observable.fromEvent(document, 'mouseup').map(false); // `mu` will emit `false` whenever the mouse is depressed

const source = Rx.Observable.range(1, 3) .map(x => x * x); const subscription = source.subscribe( x => console.log(`Next: ${x}`), err => console.log(`Error: ${err}`), () => console.log(`Completed`) ); // => Next: 1 // => Next: 4 // => Next: 9 // => Compl...

const source = Rx.Observable.range(1, 3) .map((x, idx, obs) => `Element ${x} was at position ${idx}`); const subscription = source.subscribe( x => console.log(`Next: ${x}`), err => console.log(`Error: ${err}`), () => console.log(`Completed`) ); // => Next: Element 1...

Often when building a Docker image, the Dockerfile contains instructions that runs programs to fetch resources from the Internet (wget for example to pull a program binary build on GitHub for example). It is possible to instruct Docker to pass set set environment variables so that such programs per...

Usage of loops is an excellent way to keep the code DRY and avoid repetition. Unlike in Sass, there are no built-in @for or @each directive in Less for writing loops but it can still be written using recursive mixins. A recursive mixin is nothing but a mixin which keeps calling itself. There are fo...

The chart consists out of HTML container and the JavaScript code that instantiates a chart in it. HTML We use a <div> element as chart container. <div id="chartdiv" style="height: 300px;"></div> JavaScript To instantiate the chart we use AmCharts.makeChar...

A for-each loop in Less has the same key components as a for loop except for the following differences: A variable which contains the list of items that has to be iterated over. An extract() function to extract each item in the variable based on the loop's index. A length() function to calculat...

After launching Visual Studio 2015, go to File → New → Project. In the New Project dialog box, browse in the templates tree to Visual C# → Windows → Universal and select Blank App (Universal Windows). Next, we need to fill the form to describe the Application: Name: this is the name of the appli...

You might want to import and export your database for bacukups for example. Dont forget about the permissions. public void exportDatabase(){ try { File sd = Environment.getExternalStorageDirectory(); File data = Environment.getDataDirectory(); String currentD...

If you have multiple libraries in the same solution, you can add local (project) references between them: { "dependencies": { "NETStandard.Library": "1.6.0", "MyOtherLibrary": { "target": "project" } }...

Create an empty directory somewhere ... mkdir HelloWorld cd HelloWorld Then use the built in scaffolding technology to create a Hello World sample dotnet new console -o This command creates two files: HelloWorld.csproj describes the project dependencies, settings, and Target Framework ...

This basic example shows how an application can instantiate a classloader and use it to dynamically load a class. URL[] urls = new URL[] {new URL("file:/home/me/extras.jar")}; Classloader loader = new URLClassLoader(urls); Class<?> myObjectClass = loader.findClass("com.exampl...

To use additional packages within the Rcpp ecosystem, the correct header file may not be Rcpp.h but Rcpp<PACKAGE>.h (as e.g. for RcppArmadillo). It typically needs to be imported and then the dependency is stated within // [[Rcpp::depends(Rcpp<PACKAGE>)]] Examples: // Use the RcppAr...

Every custom loader must directly or indirectly extend the java.lang.ClassLoader class. The main extension points are the following methods: findClass(String) - overload this method if your classloader follows the standard delegation model for class loading. loadClass(String, boolean) - overloa...

A statement is constructed with a function such as sqlite3_prepare_v2(). A prepared statement object must be cleaned up with sqlite3_finalize(). Do not forget this in case of an error. If parameters are used, set their values with the sqlite3_bind_xxx() functions. The actual execution happens whe...

A simple example which provides the options: OptAlt. OptDetails-h--helpShow help-v--versionShow version info-dr path--doc-root pathAn option which takes a secondary parameter (a path)-i--installA boolean option (true/false)-*--Invalid option #!/bin/bash dr='' install=false skip=false for op ...

a='I am a simple string with digits 1234' pat='(.*) ([0-9]+)' [[ "$a" =~ $pat ]] echo "${BASH_REMATCH[0]}" echo "${BASH_REMATCH[1]}" echo "${BASH_REMATCH[2]}" Output: I am a simple string with digits 1234 I am a simple string with digits 1234

The following function reads an entire file into a new string and returns it: (defun read-file (infile) (with-open-file (instream infile :direction :input :if-does-not-exist nil) (when instream (let ((string (make-string (file-length instream)))) (read-sequence string instr...

class ImageCreationExample { static Image createSampleImage() { // instantiate a new BufferedImage (subclass of Image) instance BufferedImage img = new BufferedImage(640, 480, BufferedImage.TYPE_INT_ARGB); //draw something on the image paintOnI...

.intel_syntax noprefix .data .align 16 hello_msg: .asciz "Hello, World!" .text .global _main _main: push rbp mov rbp, rsp lea rdi, [rip+hello_msg] call _puts xor rax, rax leave ret Assemble: clang main.s -o hello ./hello Not...