Tutorial by Examples: i

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...

using Newtonsoft.Json.Linq; using System.Collections.Generic; public class JsonFieldsCollector { private readonly Dictionary<string, JValue> fields; public JsonFieldsCollector(JToken token) { fields = new Dictionary<string, JValue>(); CollectFields...

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...

TBD. Will cover the Jenkins setup for pulling code from git/bitbucket etc.

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>

The tokio-signal crate provides a tokio-based solution for handling signals. It's still in it's early stages though. extern crate futures; extern crate tokio_core; extern crate tokio_signal; use futures::{Future, Stream}; use tokio_core::reactor::Core use tokio_signal::unix::{self as unix_si...

public class Foo { private String name; public Foo(@NonNull String name){...}; ... } Here @NonNull is annotation which is processed compile time by the android studio to warn you that the particular function needs non null parameter.

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...

There are three types of annotations. Marker Annotation - annotation that has no method @interface CustomAnnotation {} Single-Value Annotation - annotation that has one method @interface CustomAnnotation { int value(); } Multi-Value Annotation - annotation that...

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...

You can run the current chunk by clicking Run current Chunk (green play button) present on the right side of the chunk. Alternatively we can use keyboard shortcut Ctrl + Shift + Enter (OS X: Cmd + Shift + Enter) The output from all the lines in the chunk will appear beneath the chunk. Splitting Co...