Tutorial by Examples: b

document.getElementById('uniqueID') will retrieve <div id="uniqueID"></div> As long as an element with the given ID exists, document.getElementById will return only that element. Otherwise, it will return null. Note: IDs must be unique. Multiple elements cannot have the...

document.getElementsByClassName('class-name') will retrieve <a class="class-name">Any</a> <b class="class-name">tag</b> <div class="class-name an-extra-class">with that class.</div> If no existing elements contain the given c...

document.getElementsByTagName('b') will retrieve <b>All</b> <b>of</b> <b>the b elements.</b> If no elements with the given tag name exist, an empty collection will be returned.

Firebase Authentication allows the users of your app to sign-in with social providers or their email+password. But what if you want to store additional information about a user, beyond what Firebase Authentication allows you to specify? Or what if you want to display a list of the users in your app...

<link rel="stylesheet" href="test.css" media="print"> Media specifies what style sheet should be used for what type of media. Using the print value would only display that style sheet for print pages. The value of this attribute can be any of the mediatype val...

Cloning from a git repository is ten times faster than cloning directly from TFVS and works well in a team environment. At least one team member will have to create the bare git repository by doing the regular git-tfs clone first. Then the new repository can be bootstrapped to work with TFVS. $ git...

The std::borrow::Borrow and std::borrow::BorrowMut traits are used to treat borrowed types like owned types. For types A and B, impl Borrow<B> for A indicates that a borrowed A may be used where a B is desired. For instance, std::collections::HashMap.get() uses Borrow for its get() method,...

The Azure Webjobs SDK is a framework distributed as a Nuget package aimed at helping you define Functions that are run by Triggers and use Bindings to other Azure services (like Azure Storage and Service Bus) in a declarative fashion. The SDK uses a JobHost to coordinate your coded Functions. In a ...

A simple example of a Function that gets triggered when a Azure Storage Blob is modified: public static async Task BlobTrigger( [BlobTrigger("my_container/{name}.{ext}")] Stream input, string name, string ext) { //Blob with name {name} and extension {ext} using (StreamRead...

The SDK supports time triggered based on CRON expressions with 6 fields ({second} {minute} {hour} {day} {month} {day of the week}). It requires an extra setting on the JobHostConfiguration: config.UseTimers(); Your time triggered functions respond to this syntax: // Runs once every 5 minutes p...

Error handling is extremely important, we can define functions to be triggered when an execution error happens in one of your triggered functions: //Fires when 10 errors occur in the last 30 minutes (sliding) public static void ErrorMonitor([ErrorTrigger("0:30:00", 10)] TraceFilter filte...

Sometimes builds take longer than expected. There are a few environment variables you can set to better understand what's happening during the build process. METEOR_DEBUG_BUILD=1 (logs progress) METEOR_PROFILE=<n> (logs time spent) METEOR_DEBUG_SPRINGBOARD=1 (?) METEOR_DEBUG_...

Using escaped brackets, you can define a capturing group in a pattern that can be backreferenced in the substitution string with \1: $ echo Hello world! | sed 's/\(Hello\) world!/\1 sed/' Hello sed With multiple groups: $ echo one two three | sed 's/\(one\) \(two\) \(three\)/\3 \2 \1/' three ...

What? : A fully supported and extensible framework for building HTTP based endpoints. In the world of HTML5, mobile devices, and modern development techniques HTTP have become the default option for building rich, scalable services. The ASP.NET Web API provides an easy to use set of default options...

<form asp-action="create" asp-controller="Home"> <!--Your form elements goes here--> </form>

<form asp-action="create" asp-controller="Home" asp-route-returnurl="dashboard" asp-route-from="google"> <!--Your form elements goes here--> </form> This will generate the below markup <form action=&qu...

Extension methods enable you to simplify your interface definitions by only including core required functionality in the interface itself and allowing you to define convenience methods and overloads as extension methods. Interfaces with fewer methods are easier to implement in new classes. Keeping o...

# Fetch and install package to setup access to the official APT repository wget https://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb sudo dpkg -i erlang-solutions_1.0_all.deb # Update package index sudo apt-get update # Install Erlang and Elixir sudo apt-get install esl-erlan...

5 With ES5+, the Object.create function can be used to create an Object with any other Object as it's prototype. const anyObj = { hello() { console.log(`this.foo is ${this.foo}`); }, }; let objWithProto = Object.create(anyObj); objWithProto.foo = 'bar'; objWithProto.hell...

Run command below to install nginx. sudo apt-get install nginx By default, Nginx automatically starts when it is installed. You can access the default Nginx landing page to confirm that the software is running properly by visiting your server's domain name or public IP address in your web browse...