Tutorial by Examples: d

Set a convenience method in your base model namespace Base; class Model extends \Phalcon\Mvc\Model { public function sanitize($attr, $filterName) { $filter = $this->getDI()->get('filter'); $this->$attr = $filter->sanitize($this->$attr, $filterName); ...

The fold method iterates over a collection, using an initial accumulator value and applying a function that uses each element to update the accumulator successfully: val nums = List(1,2,3,4,5) var initialValue:Int = 0; var sum = nums.fold(initialValue){ (accumulator,currentElementBeingIterated...

The Scala compiler can also deduce type parameters when polymorphic methods are called, or when generic classes are instantiated: case class InferedPair[A, B](a: A, b: B) val pairFirstInst = InferedPair("Husband", "Wife") //type is InferedPair[String, String] // Equiv...

#include <SPI.h> #define CSPIN 1 void setup() { pinMode(CSPIN, OUTPUT); // init chip select pin as an output digitalWrite(CSPIN, 1); // most slaves interpret a high level on CS as "deasserted" SPI.begin(); SPI.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MO...

#include <Servo.h> Servo srv; void setup() { srv.attach(9); // Attach to the servo on pin 9 } To use a servo, you need to call attach() function first. It starts generating a PWM signal controlling a servo on a specified pin. On boards other than Arduino Mega, use of Servo lib...

Here are some example on how to add new filters/functions to twig,the synax for adding Twig_Functions are the same as the Twig_Filter ones, just change the keywords accordingly <?php $twig = new Twig_Environment($loader); /* You can chain a global function */ $twig->addFilter(ne...

OneGet was originally a product from the Open Source Technology Center at Microsoft. Not only is it inspired by open-source Linux package managers, OneGet itself is also open source. It's now part of PowerShell As opposed to Unix based package managers (such as apt-get, yum, or dpkg), Windows allow...

Atomic variables can be accessed concurrently between different threads without creating race conditions. /* a global static variable that is visible by all threads */ static unsigned _Atomic active = ATOMIC_VAR_INIT(0); int myThread(void* a) { ++active; // increment active race fr...

Here is a workaround to temporary reset your password for your account. Login to your hosting panel and use the database tool that is available (probably PHPmyAdmin). Load the appropriate database and then go to the jos_users table. (The database prefix might be different for your case). ...

This is an example on how to call a web service from salesforce. The code below is calling a REST based service hosted on data.gov to find farmers markets close to the zipcode. Please remember in order to invoke a HTTP callout from your org, you need to tweak the remote settings for the org. strin...

Custom Setting Custom Setting Field Custom Setting Field Value When the field is checked the validation rule will be disabled, for the running user or in this example, their profile - The rule can also be disabled for a whole Salesforce org - Validation Rule AND( /* the below is the...

Explanation In this example a simple Trigger has been created to change the Close Date of an Opportunity, that's about to be inserted or updated, to a date 10 days in the future. The Apex Controller custom setting's checkbox field enables the code to be disabled at the user / profile / org level. ...

If you need to find the last day of the month, you can do complicated DateTime gymnastics or you can use the following method. Say you want to find the last day of February 2021. Do the following: Integer month = 2; Integer day = null; Integer year = 2021; // Create a new DateTime object for ...

Sometimes we need to accept route params as well as access the HTTP Request params. We can still type hint the Requests class in laravel controller and achieve that as explained below E.g. We have a route that update a certain post like this (passing post id i route ) Route::put('post/{id}', 'Post...

In C, multi-line comments, /* and */, do not nest. If you annotate a block of code or function using this style of comment: /* * max(): Finds the largest integer in an array and returns it. * If the array length is less than 1, the result is undefined. * arr: The array of integers to search....

To address data from an XML input, XQuery uses XPath. It makes it easy to filter data and restructure it. Given the following XML input <?xml version="1.0" encoding="UTF-8"?> <applications> <application> <id>MyApp</id> <name>My...

Each signed integer type may be represented in any one of three formats; it is implementation-defined which one is used. The implementation in use for any given signed integer type at least as wide as int can be determined at runtime from the two lowest-order bits of the representation of value -1 ...

Resolving scoped services during application startup can be difficult, because there is no request and hence no scoped service. Resolving a scoped service during application startup via app.ApplicationServices.GetService<AppDbContext>() can cause issues, because it will be created in the sc...

A defer statement consists of a block of code, which will be executed when a function returns and should be used for cleanup. As Swift's guard statements encourage a style of early return, many possible paths for a return may exist. A defer statement provides cleanup code, which then does not need ...

When using a defer-statement, make sure the code remains readable and the execution order remains clear. For example, the following use of the defer-statement makes the execution order and the function of the code hard to comprehend. postfix func ++ (inout value: Int) -> Int { defer { value...