Tutorial by Examples: re

Basics require('http').globalAgent.maxSockets = 25 // You can change 25 to Infinity or to a different value by experimenting Node.js by default is using maxSockets = Infinity at the same time (since v0.12.0). Until Node v0.12.0, the default was maxSockets = 5 (see v0.11.0). So, after more tha...

""" CannyTrackbar function allows for a better understanding of the mechanisms behind Canny Edge detection algorithm and rapid prototyping. The example includes basic use case. 2 of the trackbars allow for tuning of the Canny function and the other 2 help with understanding h...

Let's define a grammar enabling us to perform additions, multiplications with the usage of parenthesis. To add more value to this example, we are going to compute the result of the arithmetic expression. Summary of the grammar: expression → times expression → times '+' expression times → elemen...

Suppose we want to know how many users have the same name. Let us create table users as follows: create table users( id serial, name varchar(8) unique, count int ); Now, we just discovered a new user named Joe and would like to take him into account. To achieve that, we need to d...

Install Firebase resource in the the AppScript To do that click on Resources and then on Libraries. Firebase has a unique project library key that need to be installed in the AppScript. Click on Libraries The following pop-up appears. Enter the following project key in the textbox. MYeP8ZEE...

1. To write a simple data to test whether connection is working or not. function myFunction(){ var firebaseUrl = "https://example-app.firebaseio.com/"; var secret = "secret-key"; var base = FirebaseApp.getDatabaseByUrl(firebaseUrl, secret); base.setData("test&quo...

Team Foundation Server (TFS) can be installed in two basic infrastructure ways, Single Server Deployment and Multi-Server Deployment. The difference between these two deployments is where the Application Tier (TFS) and the Data Tier (MS SQL) reside. It is considered best practice to install TFS in...

public void OpenXmppConnection(int port, bool useSsl, string serverJid, string userName, string password) { try { _xmppClientConnection.AutoResolveConnectServer = true; _xmppClientConnection.Port = port; _xmppClien...

Some projects like GoLang might need to clone other dependent GitLab repositories during build. To get this working you can add a Deploy Key to dependent repositories and put the private key (without password) into the origin repository. Create and check-in a SSH key inside the Git Repository that ...

Creates a graph topology in a distributed manner so that each node defines its neighbors. Each node communicates its rank among neighbors with MPI_Neighbor_allgather. #include <mpi.h> #include <stdio.h> #define nnode 4 int main() { MPI_Init(NULL, NULL); int rank; ...

To extend and expand upon the binding experience we have converters to convert one a value of one type into another value of another type. To leverage Converters in a Databinding you first need to create a DataConverter class tht extens either IValueConverter(WPF & UWP) or IMultiVal...

Working Example: https://jsfiddle.net/Twisty/4f5yh3pa/7/ Cancelling and Reverting a sortable is not strongly documented. The helps show how moving an item from one list to another connected list can be conditionally cancelled. by default, this is not animated by sortable, this example includes an a...

To count the occurences of a value in a numpy array. This will work: >>> import numpy as np >>> a=np.array([0,3,4,3,5,4,7]) >>> print np.sum(a==3) 2 The logic is that the boolean statement produces a array where all occurences of the requested values are 1 and all o...

Use case: remember the current URL to return to after adding a new record in a different (related) controller, for instance create a new contact to add to an invoice being edited. InvoiceController / actionUpdate: Url::remember(Url::current(), 'returnInvoice'); ContactController / actionCreate:...

The stdio.h header defines the fgets() function. This function reads a line from a stream and stores it in a specified string. The function stops reading text from the stream when either n - 1 characters are read, the newline character ('\n') is read or the end of file (EOF) is reached. #include &l...

These function will help you to take the screenshot and also match the image with the part of the screen. .screenshot('c:\\path') #get the screenshot. .locateOnScreen('c:\\path') #search that image on screen and get the coordinates for you. locateCenterOnScreen('c:\\path') #get th...

Note: For brevity, the commands use here-strings (<<<) and ANSI C-quoted strings ($'...'). Both these shell features work in bash, ksh, and zsh. # GNU Sed $ sed ':a;$!{N;ba}; s/\n/\t/g' <<<$'line_1\nline_2\nline_3' line_1 line_2 line_3 # BSD Sed equivalent (multi-line form) ...

The caret-color CSS property specifies the color of the caret, the visible indicator of the insertion point in an element where text and other content is inserted by the user's typing or editing. HTML <input id="example" /> CSS #example { caret-color: red; } Resources: ...

Step 1: Create your GitHub account If you already have a GitHub account, please proceed to Step 2. Otherwise, please follow below: 1.a Go to Github page. 1.b Enter your desired username, your email address and then your desired password. Afterwards, click the Sign up for GitHub button. Step 2:...

The yarn init command will walk you through the creation of a package.json file to configure some information about your package. This is similar to the npm init command in npm. Create and navigate to a new directory to hold your package, and then run yarn init mkdir my-package && cd my-pa...