Tutorial by Examples: r

Like list, simplest function over iolist and bitstring is: -spec loop(iolist()) -> ok | {ok, iolist} . loop(<<>>) -> ok; loop(<<Head, Tail/bitstring>>) -> loop(Tail); loop(<<Rest/bitstring>>) -> {ok, Rest} You can call it like this: lo...

This example covers the implementation of ExtentReports in Selenium using TestNG, Java and Maven. ExtentReports are available in two versions, community and commercial. For the ease and demonstration purpose, we will be using community version. 1. Dependency Add the dependency in your Maven pom.x...

This example covers the implementation of Allure Reports in Selenium using TestNG, Java and Maven. Maven Configuration Repository Add following code to configure the jcenter repository <repository> <id>jcenter</id> <name>bintray</name> ...

You can make function passed to test() method async - then you can use await keyword. Your test will wait until Promises resolve and testing asynchronous code becomes easier and more readable. In the following example call that returns a Promise is changeset.validate(). Please notice also wrapping s...

Let's say Joe owns a website that allows you to log on, view puppy videos, and save them to your account. Whenever a user searches on that website, they are redirected to https://example.com/search?q=brown+puppies. If a user's search doesn't match anything, than they see a message along the lines ...

Let's say that Bob owns a social website that allows users to personalize their profiles. Alice goes to Bob's website, creates an account, and goes to her profile settings. She sets her profile description to I'm actually too lazy to write something here. When her friends view her profile, this co...

Let's say that Bob owns a site that lets you post public messages. The messages are loaded by a script that looks like this: addMessage("Message 1"); addMessage("Message 2"); addMessage("Message 3"); addMessage("Message 4"); addMessage("Message 5&qu...

If you don't think that malicious scripts can harm your site, you are wrong. Here is a list of what a malicious script could do: Remove itself from the DOM so that it can't be traced Steal users' session cookies and enable the script author to log in as and impersonate them Show a fake "Yo...

public class Equatable { public string field1; public override bool Equals(object obj) { if (ReferenceEquals(null, obj)) return false; if (ReferenceEquals(this, obj)) return true; var type = obj.GetType(); if (GetType() != type) re...

Navigation bars are essentially a list of links, so the ul and li elements are used to encase navigation links. <ul> <li><a href="#">Home</a></li> <li><a href="#">About</a></li> <li><a href="#">...

To make a navigation bar using the HTML5 nav element, encase the links within the nav tag. <nav> <a href="#">Home</a> <a href="#">About</a> <a href="#">Contact</a> </nav>

Ensure you met all requirements, as per Requirements Mount the temporary API filesystems: cd /location/of/new/root mount -t proc proc proc/ mount --rbind /sys sys/ mount --rbind /dev dev/ mount --rbind /run run/ (optionally) If you need to use an internet connection in the c...

root privileges another working Linux environment,such as Live CD boot or an existing distribution matching environment architectures of chroot source and destination (check current environment architecture with uname -m) kernel modules which you may need in chroot environment must be loaded (f...

Changing root is commonly done for performing system maintenance on systems where booting and/or logging in is no longer possible. Common examples are: reinstalling the bootloader rebuilding the initramfs image upgrading or downgrading packages resetting a forgotten password building softwar...

For creating custom annotations we need to decide Target - on which these annotations will work on like field level, method level, type level etc. Retention - to what level annotation will be available. For this, we have built in custom annotations. Check out these mostly used ones: @Target...

This way can be so helpfull, but, some people (like me) are afreak of repeat code, and like you are showin us, it means that I need to create a contact controller with the same code on each proyect that we have, so, I thing that this can be helpfull too This is my class, that can be on a DLL or wha...

You can create a new notebook in RStudio with the menu command File -> New File -> R Notebook If you don't see the option for R Notebook, then you need to update your version of RStudio. For installation of RStudio follow this guide

Chunks are pieces of code that can be executed interactively. In-order to insert a new chunk by clicking on the insert button present on the notebook toolbar and select your desired code platform (R in this case, since we want to write R code). Alternatively we can use keyboard shortcuts to insert a...

When you execute code in a notebook, an indicator will appear in the gutter to show you execution progress. Lines of code which have been sent to R are marked with dark green; lines which have not yet been sent to R are marked with light green. Executing Multiple Chunks Running or Re-Running indiv...

Before rendering the final version of a notebook we can preview the output. Click on the Preview button on the toolbar and select the desired output format. You can change the type of output by using the output options as "pdf_document" or "html_notebook"