Tutorial by Examples: r

Use Dojo from CDN Load Dojo through <script> tags in your HTML page pointing to Google CDN. Example: <script src="//ajax.googleapis.com/ajax/libs/dojo/1.11.2/dojo/dojo.js"></script> Install Dojo with Bower Type the following command in your project directory: bowe...
Mage::app()->getStores(); Returns an array of Mage_Core_Model_Store models.
To get started quickly with Express, you can use the Express generator which will create an application skeleton for you. First, install it globally with npm: npm install express-generator -g You may need to put sudo before this command if you get a "permission denied" error. Once th...
Command line You can use cpan to install modules directly from the command line: cpan install DBI This would be followed by possibly many pages of output describing exactly what it is doing to install the module. Depending on the modules being installed, it may pause and ask you questions. Int...
The Fluent NHibernate is a library to help you to map the entities using C# code instead of xml mappings. Fluent NHibernate uses the fluent pattern and it is based on conventions to create the mappings and it gives you the power of the visual studio tools (such as intellisense) to improve the way yo...
IQueryable<Cat> cats = session.Query<Cat>() .Where(c => c.Name == "Max");
Also known as bogosort. import Data.List (permutations) sorted :: Ord a => [a] -> Bool sorted (x:y:xs) = x <= y && sorted (y:xs) sorted _ = True psort :: Ord a => [a] -> [a] psort = head . filter sorted . permutations Extremely inefficient (on today's compu...
A basic QueryOver query is performed against an ISession using the QueryOver<T> method, where T is the type of a mapped entity. IList<Customer> customers = session.QueryOver<Customer>() .Where(c => c.LastName == "Simpson") .List();
Google currently has two ways to load the JS library for Google Visualization (a.k.a Google Charts), gstatic loader (https://www.gstatic.com/charts/loader.js) and jsapi (https://www.google.com/jsapi). The gstatic loader is recommended because Google is transitioning away from jsapi to the gstati...
Show a "Hello World!" in message box. MsgBox, Hello World! Show "Hello World!" stored in variable MyString in message box. MyString := "Hello World!" MsgBox, %MyString% Show a "Hello World!" in tooltip. #Persistent Tooltip, Hello World! Show a &q...
This will show you the generated SQL, but will not show you the values contained within the queries. <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="hibernateProperties"> <p...
If you have any exposure to other text-based template languages, such as Smarty, Django, or Jinja, you should feel right at home with Twig. It's both designer and developer friendly by sticking to PHP's principles and adding functionality useful for templating environments. The key-features are... ...
Categories provide the ability to add some extra functionality to an object without subclassing or changing the actual object. For example we want to set some custom fonts. Let's create a category that add functionality to UIFont class. Open your XCode project, click on File -> New -> File a...
Def: Final Keyword prevents child classes from overriding a method by prefixing the definition with final. If the class itself is being defined final then it cannot be extended Final Method class BaseClass { public function test() { echo "BaseClass::test() called\n"; } ...
The @ sign binds a variable to a name during a pattern match. The bound variable can either be the entire matched object or part of the matched object: sealed trait Shape case class Rectangle(height: Int, width: Int) extends Shape case class Circle(radius: Int) extends Shape case object Point ex...
Pattern matching can also be used to check the type of an instance, rather than using isInstanceOf[B]: val anyRef: AnyRef = "" anyRef match { case _: Number => "It is a number" case _: String => "I...
The [ and [[ operators are primitive functions that are generic. This means that any object in R (specifically isTRUE(is.object(x)) --i.e. has an explicit "class" attribute) can have its own specified behaviour when subsetted; i.e. has its own methods for [ and/or [[. For example, this is...
This operator checks whether the object is of a particular class/interface type. instanceof operator is written as: ( Object reference variable ) instanceof (class/interface type) Example: public class Test { public static void main(String args[]){ String name = "Buyya";...
The left hand operand for these operators must be a either a non-final variable or an element of an array. The right hand operand must be assignment compatible with the left hand operand. This means that either the types must be the same, or the right operand type must be convertible to the left o...
The R-Logo is a multilayer raster file (red, green, blue) library(raster) r <- stack("C:/Program Files/R/R-3.2.3/doc/html/logo.jpg") plot(r) The individual layers of the RasterStack object can be adressed by [[. plot(r[[1]])

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