Tutorial by Examples: u

Borland's Turbo Assembler - TASM

Borland started out with a Pascal compiler that they called "Turbo Pascal". This was followed by compilers for other languages: C/C++, Prolog and Fortran. They also produced an assembler called "Turbo Assembler", which, following Microsoft's naming convention, they called "T...

Intel x86 Assembly Language & Microarchitecture • Assemblers

GNU assembler - gas

When the GNU project needed an assembler for the x86 family, they went with the AT&T version (and its syntax) that was associated with Unix rather than the Intel/Microsoft version.

Intel x86 Assembly Language & Microarchitecture • Assemblers

Function

Function is a set of instructions, which are grouped together. These grouped instructions together perform certain task. In erlang, all the functions will return a value when they are called. Below is an example of a function that adds two numbers add(X, Y)-> X + Y. This function performs an...

Erlang Language • Getting started with Erlang Language

Background Page

Background pages are implicit pages which contain background scripts. A background script is a single long-running script to manage some task or state. It exists for the lifetime of your extension, and only one instance of it at a time is active. You can declare it like this in your manifest.json: ...

google-chrome-extension • Getting started with google-chrome-extension

Loop Control statements : Break and Continue

Loop control statements are used to change the flow of execution from its normal sequence. When execution leaves a scope, all automatic objects that were created in that scope are destroyed. The break and continue are loop control statements. The break statement terminates a loop without any furthe...

C++ • Loops

Fade in/out animation

In order to get a view to slowly fade in or out of view, use an ObjectAnimator. As seen in the code below, set a duration using .setDuration(millis) where the millis parameter is the duration (in milliseconds) of the animation. In the below code, the views will fade in / out over 500 milliseconds, o...

Android • Animators

Displaying numbers with required precision

var a:Number=0.123456789; trace(a); // 0.123456789 trace(a.toPrecision(4)); // 0.1235 trace(a.toFixed(4)); // 0.1235 trace(a.toExponential(4)); // 1.2345e-1 trace(a.toString(16)); // 0 - works for integer part only var b:Number=12345678.9876543; // a bigg...

ActionScript 3 • Working with numerical values

How to create resuable component using directive

AngularJS directives are what controls the rendering of the HTML inside an AngularJS application. They can be an Html element, attribute, class or a comment. Directives are used to manipulate the DOM, attaching new behavior to HTML elements, data binding and many more. Some of examples of directives...

AngularJS • Custom Directives

Add column with default value

The following example adds a column admin to the users table, and gives that column the default value false. class AddDetailsToUsers < ActiveRecord::Migration[5.0] def change add_column :users, :admin, :boolean, default: false end end Migrations with defaults might take a long tim...

Ruby on Rails • ActiveRecord Migrations

ngBind (curly markup)

AngularJS code for rendering plain text: <p>{{ ScopePropertyX }} and {{ ScopePropertyY }}</p> KnockoutJS equivalent: <p>  and  </p> or: ...

knockout.js • Equivalents of AngularJS bindings

ngModel on input[type=text]

AngularJS code for two-way binding on a text input: <input ng-model="ScopePropertyX" type="text" /> KnockoutJS equivalent: <input data-bind="textInput: ScopeObservableX" type="text" />

knockout.js • Equivalents of AngularJS bindings

Laravel 5 App on Shared Hosting on Linux Server

By default Laravel project's public folder exposes the content of the app which can be requested from anywhere by anyone, the rest of the app code is invisible or inaccessible to anyone without proper permissions. After developing the application on your development machine, it needs to be pushed t...

Laravel • Deploy Laravel 5 App on Shared Hosting on Linux Server

Let's use the controller a little more

Now we'll try going for a little more complex example, using the capabilities of the controller to fill in the view. Here is our view: /application/views/hello_world.php <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <titl...

codeigniter • Let's start: Hello World

Let's choose our greetings: Hello World or Good Bye World or ...?

Let's say that we want to have an alternative greeting that is accessible through a different URL. We might create a new function or even a new controller for that, but a best practice is to optimize what we already have, to make it work at it's best! To do this, we'll keep the same view as in the ...

codeigniter • Let's start: Hello World

Using collection initializer inside object initializer

public class Tag { public IList<string> Synonyms { get; set; } } Synonyms is a collection-type property. When the Tag object is created using object initializer syntax, Synonyms can also be initialized with collection initializer syntax: Tag t = new Tag { Synonyms = new List&...

C# Language • Collection Initializers

Recursively describe an object structure

Recursion is when a method calls itself. Preferably it will do so until a specific condition is met and then it will exit the method normally, returning to the point from which the method was called. If not, a stack overflow exception might occur due to too many recursive calls. /// <summary>...

C# Language • Recursion

Automatic package installation on emacs start-up

;; package.el is available since emacs 24 (require 'package) ;; Add melpa package source when using package list (add-to-list 'package-archives '("melpa" . "http://melpa.org/packages/") t) ;; Load emacs packages and activate them ;; This must come before configurations o...

emacs • Package Management

Basic Routes

Routes in Flask can be defined using the route decorator of the Flask application instance: app = Flask(__name__) @app.route('/') def index(): return 'Hello Flask' The route decorator takes a string which is the URL to match. When a request for a URL that matches this string is receive...

Flask • Routing

Multiple page PDF

UIGraphicsBeginPDFContextToFile(fileName, CGRectZero, nil); UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, 600, 792), nil); UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, 600, 792), nil); UIGraphicsBeginPDFPageWithInfo(CGRectMake(0, 0, 600, 792), nil); ...

iOS • PDF Creation in iOS

Gotcha: Exception in Dispose method masking other errors in Using blocks

Consider the following block of code. try { using (var disposable = new MyDisposable()) { throw new Exception("Couldn't perform operation."); } } catch (Exception ex) { Console.WriteLine(ex.Message); } class MyDisposable : IDisposable { public vo...

C# Language • Using Statement