Tutorial by Examples: en

The BigInteger class has a constructor dedicated to generate random BigIntegers, given an instance of java.util.Random and an int that specifies how many bits will the BigInteger have. Its usage is quite simple - when you call the constructor BigInteger(int, Random) like this: BigInteger randomBigI...

public class QuickSort { private static int Partition(int[] input, int low, int high) { var pivot = input[high]; var i = low - 1; for (var j = low; j <= high - 1; j++) { if (input[j] <= pivot) { i++; ...

An example of a constraint as expressed in the C standard is having two variables of the same name declared in a scope1), for example: void foo(int bar) { int var; double var; } This code breaches the constraint and must produce a diagnostic message at compile time. This is very usef...

We have a DataListComponent that shows a data we pull from a service. DataListComponent also has a PagerComponent as it's child. PagerComponent creates page number list based on total number of pages it gets from the DataListComponent. PagerComponent also lets the DataListComponent know when user c...

Here I have shared a code snippet for implementing endless scrolling in recycle view. Step 1: First make a one abstract method in Recycleview adapter like below. public abstract class ViewAllCategoryAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { public abstract void lo...

Viewchild offers one way interaction from parent to child. There is no feedback or output from child when ViewChild is used. We have a DataListComponent that shows some information. DataListComponent has PagerComponent as it's child. When user makes a search on DataListComponent, it gets a data fro...

public class KnapsackProblem { private static int Knapsack(int w, int[] weight, int[] value, int n) { int i; int[,] k = new int[n + 1, w + 1]; for (i = 0; i <= n; i++) { int b; for (b = 0; b <= w; b++) { ...

You can parse XML from a string or from a XML file 1. From a string $xml_obj = simplexml_load_string($string); 2. From a file $xml_obj = simplexml_load_file('books.xml'); Example of parsing Considering the following XML: <?xml version="1.0" encoding="UTF-8"?> &l...

You need to change price scope 'Global' to 'website' (Sysytem->Configuration->Catalog->Catalog->Price) $client = new SoapClient('http://your-web-site/api/soap/?wsdl'); $API_USER = 'your-api-user'; $API_KEY = 'your-api-key'; $session = $client->login($API_USER, $API_KEY); $result...

var x = 5; var str = "if (x == 5) {console.log('z is 42'); z = 42;} else z = 0; "; console.log("z is ", eval(str)); The use of eval is strongly discouraged. See the Remarks section for details.

import { NgModule, CUSTOM_ELEMENTS_SCHEMA } from '@angular/core'; import { CommonModule } from '@angular/common'; import { AboutComponent } from './about.component'; @NgModule({ imports: [ CommonModule ], declarations: [ AboutComponent ], exports: [ AboutComponent ], schemas...

import { Component } from '@angular/core'; @Component({ selector: 'myapp-about', template: `<my-webcomponent></my-webcomponent>` }) export class AboutComponent { }

By default, PHP Curl supports GET and POST requests. It is possible to also send custom requests, such as DELETE, PUT or PATCH (or even non-standard methods) using the CURLOPT_CUSTOMREQUEST parameter. $method = 'DELETE'; // Create a DELETE request $ch = curl_init($url); curl_setopt($ch, CURLOPT...

Preparing data: create table wf_example(i int, t text,ts timestamptz,b boolean); insert into wf_example select 1,'a','1970.01.01',true; insert into wf_example select 1,'a','1970.01.01',false; insert into wf_example select 1,'b','1970.01.01',false; insert into wf_example select 2,'b','1970.01.01...

public class IntegerPartition { public static int[,] Result = new int[100,100]; private static int Partition(int targetNumber, int largestNumber) { for (int i = 1; i <= targetNumber; i++) { for (int j = 1; j <= largestNumber; j++) ...

Before install this extension, you must install yii2-app. In this example, I use yii2-basic template. Guide for installation in here. Run composer require --prefer-dist yiisoft/yii2-authclient or add "yiisoft/yii2-authclient": "~2.1.0" to the require section of your comp...

Persistence is created in docker containers using volumes. Let's create a Limesurvey container and persist the database, uploaded content and configuration in a named volume: docker volume create --name mysql docker volume create --name upload docker run -d --name limesurvey -v mysql:/var/lib/m...

We need to create a container to mount the volume. Then archive it and download the archive to our host. Let's create first a data volume with some data: docker volume create --name=data echo "Hello World" | docker run -i --rm=true -v data:/data ubuntu:trusty tee /data/hello.txt Let...

When calling driver.Navigate().GoToUrl(url);, the code execution stops until the page is fully loaded. This is sometimes unnecessary when you just want to extract data. Note: The code samples below could be considered hacks. There is no "official" way of doing this. Create a new thread...

here you can find the functions. With the table wf_example created in previous example, run: select i , dense_rank() over (order by i) , row_number() over () , rank() over (order by i) from wf_example The result is: i | dense_rank | row_number | rank ---+------------+------------+-...