Tutorial by Examples: ce

Suppose we want to have the following behaviour - We have a heading (say h3 element) and on clicking it, we want it to become an input box so that we can modify heading name. React makes this highly simple and intuitive using component states and if else statements. (Code explanation below) // I ha...

package com.example.domain; import org.springframework.data.jpa.repository.JpaRepository; import org.springframework.data.repository.query.Param; import org.springframework.data.rest.core.annotation.RepositoryRestResource; import org.springframework.data.rest.core.annotation.RestResource; /...

Mapreduce is a programming model to do processing on (very) large amounts of data. Traditional 'HPC' (High Performance Computing) speeds up large calculations on relatively large amounts of data by creating a set of highly connected computers (using things like extremely quick networking, and quick...

PHPUnit provides the following function to assert whether an object is an instance of a class: assertInstanceOf($expected, $actual[, $message = '']) The first parameter $expected is the name of a class (string). The second parameter $actual is the object to be tested. $message is an optional ...

First we can specify the directories of header files by include_directories(), then we need to specify the corresponding source files of the target executable by add_executable(), and be sure there's exactly one main() function in the source files. Following is a simple example, all the files are a...

Each table view must have a delegate and a data source. Delegate Methods None of the delegate methods are actually required, however you'll need to implement tableView:didSelectRowAtIndexPath: to handle touches on a table cell: And other methods are... // Display customization - (void)tableVi...

You can create a custom exception and throw them during the execution of your function. As a general practice you should only throw an exception when your function could not achieve its defined functionality. Private Function OpenDatabase(Byval Server as String, Byval User as String, Byval Pwd as S...

SauceLabs is an Automated Testing Platform for the enterprise. It supports both continuous integration, cross browser testing, and a mobile device cloud. Costs are higher than with Travis, Circle, or BrowserStack, hwoever. { "selenium" : { "start_process" : false, ...

#lang racket (for ([path (in-directory)] #:when (regexp-match? #rx"[.]rkt$" path)) (printf "source file: ~a\n" path)) The #lang line specifies the programming language of this file. #lang racket we are using the baseline, battery-included Racket programming language. O...

Python Code import numpy as np import cv2 #loading haarcascade classifiers for face and eye #You can find these cascade classifiers here #https://github.com/opencv/opencv/tree/master/data/haarcascades #or where you download opencv inside data/haarcascades face_cascade = cv2.CascadeClassi...

Image img = new Image(); BitmapImage bitmap = new BitmapImage(new Uri("ms-appx:///Path-to-image-in-solution-directory", UriKind.Absolute)); img.Source = bitmap;

By selecting a matrix and choosing "Insert Table" from the menu, you create a table which allows you to pull and insert data in a structured way. Let's say you have named the table "SalesEvents" and given that the first (header) row reads "Salesperson" "Date" ...

By creating an instance of the same class with a different type given, the interface of the class changes depending on the given type. Dim theStringClass As New SomeClass(Of String) Dim theIntegerClass As New SomeClass(Of Integer)

Creating a new intance of a generic type can be done/checed at compile time. Public Class SomeClass(Of T As {New}) Public Function GetInstance() As T Return New T End Function End Class Or with limited types: Public Class SomeClass(Of T As {New, SomeBaseClass}) Public F...

Django is a full stack, feature rich web development framework. It bundles a lot of functionality together to provide a common, quick and productive experience for web developers. Django projects consist of common settings, and one or more applications. Each application is a set of functionality al...

A view is any piece of code that responds to a request and returns a response. Views normally return templates along with a dictionary (called the context) which usually contains data for placeholders in the template. In django projects, views are located in the views.py module of applications. Th...

In django, a template is simply a file that contains special tags which may be replaced by data from the view. The canonical template example would be: <strong>Hello {{ name }}, I am a template!</strong> Here, the string {{ name }} identifies a placeholder that may be replaced by a ...

In django, there is a url mapper which maps URLs to specific functions (views) which return responses. This strict separation between the file system layout and the URL layout allows great flexibility when writing applications. All url patterns are stored in one or more urls.py files, and there is ...

add_shortcode is wp keyword. // recent-posts is going to be our shortcode. add_shortcode('recent-posts', 'recent_posts_function'); // This function is taking action when recent post shortcode is called. function recent_posts_function() { query_posts(array('orderby' => 'date', 'order' =&...

This functions takes parameter for how many recent posts you want to display. Ex : you want to display only five recent posts. Just passed the arguments with posts="5" (you can pass any number of recent posts that you want to display). Function fetch only five recent posts from database....