Tutorial by Examples: r

Since PHP 7.0, some of the harmful effects of type juggling can be mitigated with strict typing. By including this declare statement as the first line of the file, PHP will enforce parameter type declarations and return type declarations by throwing a TypeError exception. declare(strict_types=1); ...

bcadd vs float+float var_dump('10' + '-9.99'); // float(0.0099999999999998) var_dump(10 + -9.99); // float(0.0099999999999998) var_dump(10.00 + -9.99); // float(0.0099999999999998) var_dump(bcadd('10', '-9.99', 20)); // string(22) "0.01000000000000000000&q...

Consider the following test: it('should test something', function() { browser.get('/dashboard/'); $("#myid").click(); expect(element(by.model('username')).getText()).toEqual('Test'); console.log("HERE"); }); In the following test, when the console.log() is ex...

Pre build controls to handle Grids, Inputs, Graphs, Trees, and so on. It supports an event model that preserves state over HTTP, which benefits line-of-business Web application development. The Web Forms-based application provides dozens of events that are supported in hundreds of server co...

Razor (MVC)ASPX (Web Forms)The namespace used by the Razor View Engine is System.Web.RazorThe namespace used by the ASPX View Engine is System.Web.Mvc.WebFormViewEngineThe file extensions used by the Razor View Engine are different from a web form view engine. It uses cshtml with C# and vbhtml with ...

Now days many languages are supporting archive server to install their packages into your local machine. TCL also having same archive server we called it as Teacup teacup version teacup search <packageName> Example teacup install Expect

mkdir -p toplevel/sublevel_{01..09}/{child1,child2,child3} This will create a top level folder called toplevel, nine folders inside of toplevel named sublevel_01, sublevel_02, etc. Then inside of those sublevels: child1, child2, child3 folders, giving you: toplevel/sublevel_01/child1 toplevel/s...

Fibonacci numbers are used as a very common example for teaching recursion. fib 0 = 0 fib 1 = 1 fib n = fib (n-1) + fib (n-2)

public class Main extends JavaPlugin { @Override public void onEnable() { Bukkit.getPluginManager().registerEvents(this, this); } @EventHandler public void yourEvent(Event e) { //... } }

Problem definition: An 8 puzzle is a simple game consisting of a 3 x 3 grid (containing 9 squares). One of the squares is empty. The object is to move to squares around into different positions and having the numbers displayed in the "goal state". Given an initial state of 8-puzzle...

In Laravel documentation, a symbolic link (symlink or soft link) from public/storage to storage/app/public should be created to make files accessible from the web. (THIS PROCEDURE WILL CREATE SYMBOLIC LINK WITHIN THE LARAVEL PROJECT DIRECTORY) Here are the steps on how you can create symbolic lin...

BlurBitmapTask.java public class BlurBitmapTask extends AsyncTask<Bitmap, Void, Bitmap> { private final WeakReference<ImageView> imageViewReference; private final RenderScript renderScript; private boolean shouldRecycleSource = false; public BlurBitmapTask(@NonNu...

We will follow the official guide for spring-boot and spring-data-jpa. We will be building the application using gradle. Create the gradle build file build.gradle buildscript { repositories { mavenCentral() } dependencies { classpath("org.springframework....

When creating a scrapy project with scrapy startproject myproject, you'll find a pipelines.py file already available for creating your own pipelines. It isn't mandatory to create your pipelines in this file, but it would be good practice. We'll be explaining how to create a pipeline using the pipeli...

new Error(message) Creates new error object, where the value message is being set to message property of the created object. Usually the message arguments are being passed to Error constructor as a string. However if the message argument is object not a string then Error constructor calls .toString...

Data in R are stored in vectors. A typical vector is a sequence of values all having the same storage mode (e.g., characters vectors, numeric vectors). See ?atomic for details on the atomic implicit classes and their corresponding storage modes: "logical", "integer", "numeri...

No Longer supported: Get ["/"] = parameters => { return View["index"]; }; Changed to: Get("/", parameters => { return View["index"]; });

var gulp = require('gulp'); var path = require('path'); var shell = require('gulp-shell'); var goPath = 'src/mypackage/**/*.go'; gulp.task('compilepkg', function() { return gulp.src(goPath, {read: false}) .pipe(shell(['go install <%= stripPath(file.path) %>'], { ...

package mypackage var PublicVar string = "Hello, dear reader!" //Calculates the factorial of given number recursively! func Factorial(x uint) uint { if x == 0 { return 1 } return x * Factorial(x-1) }

Now you can start writing your own go code with auto-completion using Atom and Gulp: package main import ( "fmt" "mypackage" ) func main() { println("4! = ", mypackage.Factorial(4)) }