Tutorial by Examples: r

from selenium import webdriver # Create a new webdriver driver = webdriver.Chrome() # Get a page that has a popup window (Use mouse to click "try it" button) driver.get("http://www.w3schools.com/js/tryit.asp?filename=tryjs_alert") # Accept the opened alert driver.switch_t...

GRANT SELECT ON [dbo].[someTable] TO [aUser]; REVOKE SELECT ON [dbo].[someTable] TO [aUser]; --REVOKE SELECT [dbo].[someTable] FROM [aUser]; is equivalent DENY SELECT ON [dbo].[someTable] TO [aUser];

--implicitly map this user to a login of the same name as the user CREATE USER [aUser]; --explicitly mapping what login the user should be associated with CREATE USER [aUser] FOR LOGIN [aUser];

CREATE ROLE [myRole];

-- SQL 2005+ exec sp_addrolemember @rolename = 'myRole', @membername = 'aUser'; exec sp_droprolemember @rolename = 'myRole', @membername = 'aUser'; -- SQL 2008+ ALTER ROLE [myRole] ADD MEMBER [aUser]; ALTER ROLE [myRole] DROP MEMBER [aUser]; Note: role members can be any database-level pri...

In this example we have a service, let's call it search service that has a method called search() which will initiate a get request to a back end API. function SearchService($http) { const service = {}; service.search = function() { return $http({method: 'GET', url: `/api/s...

function calculatorService() { const service = {}; service.add = function(a,b) { return a + b } return service; } angular.module('app').factory('calculatorService', calculatorService); Testing describe('calculator service', function() { var calcula...

The easiest way is to use pip and VirtualEnv. Selenium also requires python 3.*. Install virtualenv using: $: pip install virtualenv Create/enter a directory for your Selenium files: $: cd my_selenium_project Create a new VirtualEnv in the directory for your Selenium files: $: virtualenv -...

Unity layers are similar to tags as in that they can be used to define objects that should be interacted with or should behave in a certain manner, however, layers are mainly used with functions in the Physics class: Unity Documentation - Physics Layers are represented by an integer and can be pass...

The LayerMask structure is an interface that functions almost exactly like passing an integer to the function in question. However, its biggest benefit is allowing the user to select the layer in question from a drop-down menu in the inspector. using UnityEngine; class LayerMaskExample{ pub...

This examples shows how to build a JavaFX application, where the language can be switched dynamically while the application is running. These are the message bundle files used in the example: messages_en.properties: window.title=Dynamic language change button.english=English button.german=Germa...

from selenium import webdriver # Create a new cromedriver driver = webdriver.Chrome() # Go to www.google.com driver.get("https://www.google.com") # Saves a .png file with name my_screenshot_name to the directory that # you are running the program from. screenshot_name = "my_s...

The following example code computes the sum of 1+4(3+3^2+3^3+3^4+...+3^N) series using pow() family of standard math library. #include <stdio.h> #include <math.h> #include <errno.h> #include <fenv.h> int main() { double pwr, sum=0; int i, n; ...

scp command is used to securely copy a file to or from a remote destination. If the file is in current working directly only filename is sufficient else full path is required which included the remote hostname e.g. remote_user@some_server.org:/path/to/file Copy local file in your CWD to new direct...

SOAP (Simple Access Object Protocol) is XML based, like XML-RPC, is ancestor, with file called WSDL, what describe the method to be exposed. This protocol is often based with SOAP-Enveloppe, a SOAP-Body, and alternatively SOAP-Header, the data is envelopped in a structure and be interpreted as the ...

Sometimes a build combines multiple source directories, each of which is their own 'project'. For instance, you might have a build structure like this: projectName/ build.sbt project/ src/ main/ ... test/ ... core/ src/ main/ ... test/ ... webapp/ src/ main/ ... test/ ... In t...

Logical && is logical AND, || is logical OR. == is equality, /= non-equality, < / <= lesser and > / >= greater operators. Arithmetic operators The numerical operators +, - and / behave largely as you'd expect. (Division works only on fractional numbers to avoid rounding issue...

In Haskell, you can define any infix operator you like. For example, I could define the list-enveloping operator as (>+<) :: [a] -> [a] -> [a] env >+< l = env ++ l ++ env GHCi> "**">+<"emphasis" "**emphasis**" You should always give s...

Because infixes are so common in Haskell, you will regularly need to look up their signature etc.. Fortunately, this is just as easy as for any other function: The Haskell search engines Hayoo and Hoogle can be used for infix operators, like for anything else that's defined in some library. ...

MATLAB R2016b featured a generalization of its scalar expansion1,2 mechanism, to also support certain element-wise operations between arrays of different sizes, as long as their dimension are compatible. The operators that support implicit expansion are1: Element-wise arithmetic operators: +, -,...