Tutorial by Examples: n

Pagination in Laravel

In other frameworks pagination is headache. Laravel makes it breeze, it can generate pagination by adding few lines of code in Controller and View. Basic Usage There are many ways to paginate items, but the simplest one is using the paginate method on query builder or an Eloquent query. Laravel ou...

Laravel • Pagination

Objective-C Create a Session And Data Task

NSURL *url = [NSURL URLWithString:@"http://www.example.com/"]; NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration]; // Configure the session here. NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration]; [[s...

iOS • NSURLSession

Installation or Setup

Using a CDN: <!DOCTYPE html> <head> <script src="https://cdn.jsdelivr.net/rxjs/4.1.0/rx.min.js"></script> </head> <body> <script> // `Rx` is available var one$ = Rx.Observable.of(1); var onesub = one$.subscribe(function (...

rxjs • Getting started with rxjs

Supporting Multiple Domains

Each domain supported in the app needs to make available its own apple-app-site-association file. If the content served by each domain is different, then the contents of the file will also change to support the respective paths. Otherwise, the same file can be used, but it needs to be accessible at ...

iOS • Universal Links

Signing the App-Site-Association File

Note: You can skip this part if your server uses HTTPS to serve content and jump to Application Setup guide. If your app targets iOS 9 and your server uses HTTPS to serve content, you don’t need to sign the file. If not (e.g. when supporting Handoff on iOS 8), it has to be signed using a SSL certif...

iOS • Universal Links

Setup iOS Application (Enabling Universal Links)

The setup on the app side requires two things: Configuring the app’s entitlement, and enabling the universal links by turning on the Associated Domains capability in the project. Handling Incoming Links in your AppDelegate. 1. Configuring the app’s entitlement, and enabling universal links. ...

iOS • Universal Links

Default logging

Mage::log('My log entry'); Mage::log('My log message: '.$myVariable); Mage::log($myArray); Mage::log($myObject); This will log to /var/log/system.log Objects and Arrays are automatically written via a print_r() directive. Watch out when using objects since these can get substantial in size. ...

magento • Logging to file

Installation or Setup

Detailed instructions on getting facebook-graph-api set up or installed.

facebook-graph-api • Getting started with facebook-graph-api

Common Pitfalls: Accessing DOM from the `ready()` hook

A common usecase for the ready() hook is to access the DOM, e.g. to initiate a Javascript plugin, get the dimensions of an element etc. The problem Due to Vue's asynchronous DOM update mechanism, it's not guaranteed that the DOM has been fully updated when the ready() hook is called. This usually ...

Vue.js • Lifecycle Hooks

Alternative syntax for control structures

PHP provides an alternative syntax for some control structures: if, while, for, foreach, and switch. When compared to the normal syntax, the difference is, that the opening brace is replaced by a colon (:) and the closing brace is replaced by endif;, endwhile;, endfor;, endforeach;, or endswitch;, ...

PHP • Control Structures

include & require

require require is similar to include, except that it will produce a fatal E_COMPILE_ERROR level error on failure. When the require fails, it will halt the script. When the include fails, it will not halt the script and only emit E_WARNING. require 'file.php'; PHP Manual - Control Structures - ...

PHP • Control Structures

return

The return statement returns the program control to the calling function. When return is called from within a function, the execution of the current function will end. function returnEndsFunctions() { echo 'This is executed'; return; echo 'This is not executed.'; } When you run re...

PHP • Control Structures

Synthesising audio

In this example we show how to generate a simple sine wave, and output it on the user's speakers/headphones. let audioContext = new (window.AudioContext || window.webkitAudioContext)(); let sourceNode = audioContext.createOscillator(); sourceNode.type = 'sine'; sourceNode.frequency.value = 261...

web-audio • Getting started with web-audio

Using effects on audio

Effects can be applied to audio by chaining nodes between the source and the destination node. In this example we use a gain node to mute the source, and only let sound through at specific times. This allows us to create morse code. function morse(gainNode, pattern) { let silenceTimeout = 300; ...

web-audio • Getting started with web-audio

Checking, setting, clearing, and toggling individual bits. Using long as bit mask

Assuming we want to modify bit n of an integer primitive, i (byte, short, char, int, or long): (i & 1 << n) != 0 // checks bit 'n' i |= 1 << n; // sets bit 'n' to 1 i &= ~(1 << n); // sets bit 'n' to 0 i ^= 1 << n; // toggles the value of bit 'n' Us...

Java Language • Bit Manipulation

Overloading on Forwarding Reference

You must be very careful when providing a forwarding reference overload as it may match too well: struct A { A() = default; // #1 A(A const& ) = default; // #2 template <class T> A(T&& ); // #3 }; The intent here was that A is c...

C++ • Overload resolution

Function pointers

Pointers can also be used to point at functions. Let's take a basic function: int my_function(int a, int b) { return 2 * a + 3 * b; } Now, let's define a pointer of that function's type: int (*my_pointer)(int, int); To create one, just use this template: return_type_of_func (*my_fun...

C Language • Pointers

Enable displaying of error reporting

In Index page change the following: error_reporting(E_ALL | E_STRICT); to error_reporting(E_ALL); Set $_SERVER['MAGE_IS_DEVELOPER_MODE'] = true and uncomment this line (remove the #) #ini_set('display_errors', 1); You can also Set Dev Mode using SetEnv in your .htaccess file To make th...

magento • Magento error handling, messages and reports

Creating and Initializing Image Objects with file contents

Creating and returning an image object by loading the image data from the file at the specified path. Example: UIImage *image = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:[cellCountry objectForKey:@"Country_Flag"] ofType:nil]]; Using Array: Example NSM...

iOS • UIImage

Namespaces

The general format for namespaces is: <Company>.(<Product>|<Technology>)[.<Feature>][.<Subnamespace>]. Examples include: Fabrikam.Math Litware.Security Prefixing namespace names with a company name prevents namespaces from different companies from having the sa...

C# Language • Naming Conventions