Tutorial by Examples: di

In many instances, you will want to send data from the R server to the JS client. Here is a very simple example: library(shiny) runApp( list( ui = fluidPage( tags$script( "Shiny.addCustomMessageHandler('message', function(params) { alert(params); });" ), ...

Modern browsers provide a classList object to ease manipulation of the element's class attribute. Older browsers require direct manipulation of the element's className property. W3C DOM4 A simple method to add a class to an element is to append it to the end of the className property. This will no...

There are use cases when you might want to rename your app directory to something else. In Laravel4 you could just change a config entry, here's one way to do it in Laravel5. In this example we'll be renaming the app directory to src. Override Application class The directories name app is hardcod...

Angular has some magic under its hood. it enables binding DOM to real js variables. Angular uses a loop, named the "digest loop", which is called after any change of a variable - calling callbacks which update the DOM. For example, the ng-model directive attaches a keyup eventListener to...

Implementing two-way-data-binding, to achieve the result from the previous example, could be done with two core functions: $digest is called after a user interaction (binding DOM=>variable) $watch sets a callback to be called after variable changes (binding variable=>DOM) note: this is ...

In javascript, assigning a non-primitive value (Such as Object, Array, Function, and many more), keeps a reference (an address in the memory) to the assigned value. Assigning a primitive value (String, Number, Boolean, or Symbol) to two different variables, and changing one, won't change both: var...

In medical imaging, spectroscopy, image processing, cryptography and other areas of science and engineering it is often the case that one wishes to compute multidimensional Fourier transforms of images. This is quite straightforward in Matlab: (multidimensional) images are just n-dimensional matrice...

It is possible to save a Docker container's filesystem contents to a tarball archive file. This is useful in a pinch for moving container filesystems to different hosts, for example if a database container has important changes and it isn't otherwise possible to replicate those changes elsewhere. Pl...

The method Kernel#autoload registers filename to be loaded (using Kernel::require) the first time that module (which may be a String or a symbol) is accessed. autoload :MyModule, '/usr/local/lib/modules/my_module.rb' The method Kernel#autoload? returns filename to be loaded if name is registere...

When files are not available, the require family will throw a LoadError. This is an example which illustrates loading optional modules only if they exist. module TidBits @@unavailableModules = [] [ { name: 'CoreExtend', file: 'core_extend/lib/core_extend' } \ , { name: 'Fs' ...

The Kernel#load method will evaluate the code in the given file. The search path will be constructed as with require. It will re-evaluate that code on every subsequent call unlike require. There is no load_relative. load `somefile`

You can use any ruby technique to dynamically create a list of files to load. Illustration of globbing for files starting with test, loaded in alphabetical order. Dir[ "#{ __dir__ }**/test*.rb" ) ].sort.each do |source| require_relative source end

import { Pipe, PipeTransform } from '@angular/core'; import { DatePipe } from '@angular/common' @Pipe({name: 'ifDate'}) export class IfDate implements PipeTransform { private datePipe: DatePipe = new DatePipe(); transform(value: any, pattern?:string) : any { if (typeof value === ...

Visual Studio Code is an open-source and feature-rich code editor from Microsoft. To set it up it for NativeScript development, open the Command Palette (F1 or ⌘+Shift+P) and type ext install NativeScript. Once the NativeScript extension is installed, the debugger should allow you to set breakpoint...

Enable USB Debugging on your device and from command line type adb devices. If everything is OK, the response should be: List of devices attached 1234567890 device Where 1234567890 is the device's id. If multiple devices are connected, you should see all of them: List of devices at...

Binding is the process of assigning an object to an identifier or variable name. Early binding (also known as static binding) is when an object declared in Excel is of a specific object type, such as a Worksheet or Workbook. Late binding occurs when general object associations are made, such as the ...

First you need to install and start your Redis server, check the link below that can help you to install redis on you server or local machine. Installation and Setup Now open your command prompt and run command redis-cli : To save first set >SET 'keyname' then 'value' 127.0.0.1:6379> SET h...

Corner radius for all 4 edges: UIBezierPath* rectanglePath = [UIBezierPath bezierPathWithRoundedRect: CGRectMake(x,y,width,height) cornerRadius: 11]; [UIColor.grayColor setFill]; [rectanglePath fill]; Corner radius for top-left edge: UIBezierPath* rectanglePath = [UIBezierPath bezierPat...

Add the following dependency to your project level build.gradle file. dependencies { classpath "io.realm:realm-gradle-plugin:3.1.2" } Add the following right at the top of your app level build.gradle file. apply plugin: 'realm-android' Complete a gradle sync and you now have ...

(defun fn (x) (cond (test-condition1 the-value1) (test-condition2 the-value2) ... ... ... (t (fn reduced-argument-x)))) CL-USER 2788 > (defun my-fib (n) (cond ((= n 1) 1) ((= n...