Tutorial by Examples: o

Matplotlib includes the image module for image manipulation import matplotlib.image as mpimg import matplotlib.pyplot as plt Images are read from file (.png only) with the imread function: img = mpimg.imread('my_image.png') and they are rendered by the imshow function: plt.imshow(img) L...

As a developer, you frequently find yourself dealing with strings that are not created by your own code. These will often be supplied by third party libraries, external systems, or even end users. Validating strings of unclear provenance is considered to be one of the hallmarks of defensive program...

module.exports.routes = { 'GET /foo': 'FooController.index', 'GET /foo/new': 'FooController.new', 'POST /foo/create': 'FooController.create', 'GET /foo/:id/edit': 'FooController.edit', 'PUT /foo/:id/update': 'FooController.update', 'GET /foo/:id': 'FooController.show', ...

module.exports.routes = { // This function will be executed for all http verbs on all urls 'all /*', function (req, res, next) { // Expose the function `fooBar` to all views (via the locals object) res.locals.fooBar = function (arg1) { return 'foobar' + arg1; }; }, };...

module.exports.routes = { 'GET /foo/*': { fn: function(req, res) { res.send("FOO!"); }, skipAssets: true }, };

Pattern synonyms are abstractions of patterns similar to how functions are abstractions of expressions. For this example, let's look at the interface Data.Sequence exposes, and let's see how it can be improved with pattern synonyms. The Seq type is a data type that, internally, uses a complicated r...

Visitor pattern allows you to add new operations or methods to a set of classes without modifying the structure of those classes. This pattern is especially useful when you want to centralise a particular operation on an object without extending the object Or without modifying the object. UML diag...

The yield keyword allows lazy-evaluation of the collection. Forcibly loading the whole collection into memory is called eager evaluation. The following code shows this: IEnumerable<int> myMethod() { for(int i=0; i <= 8675309; i++) { yield return i; } } ... // ...

Consider using Extension Methods as Functions which wrap other code, here's a great example that uses both a static method and and extension method to wrap the Try Catch construct. Make your code Bullet Proof... using System; using System.Diagnostics; namespace Samples { /// <summary&g...

Many database configurations require authentication (in the form of a username and password) before you can query the database. You can supply these using the username and password attributes. Note: the username and password can also be configured against the datasource in the ColdFusion Administra...

You can limit the number of rows to be returned by using the maxrows attribute. <cfquery datasource="Entertainment" maxrows="50"> select * from Movies </cfquery>

You can set a timeout limit using the timeout attribute. This can be useful in preventing requests running far longer than they should and impacting on the whole application as a result. The timeout attribute sets the maximum number of seconds that each action of a query is allowed to execute befor...

create destination with <a id="destinationLinkName"></a> link to destination [link text](#destinationLinkName)

In order to get information about the URI the user agent used to access your resource, you can use the @Context parameter annotation with a UriInfo parameter. The UriInfo object has a few methods that can be used to get different parts of the URI. //server is running on https://localhost:8080, // ...

If you want to make internal classes or functions of an assembly accessable from another assembly you declare this by InternalsVisibleTo and the assembly name that is allowed to access. In this example code in the assembly MyAssembly.UnitTests is allowed to call internal elements from MyAssembly. ...

Virtual Methods are methods in Java that are non-static and without the keyword Final in front. All methods by default are virtual in Java. Virtual Methods play important roles in Polymorphism because children classes in Java can override their parent classes' methods if the function being overriden...

To declare methods on a struct (i.e., functions that can be called "on" the struct, or values of that struct type), create an impl block: impl Foo { fn fiddle(&self) { // "self" refers to the value this method is being called on println!("fiddling...

C.I.A.s are intended as a simple way of getting attributes from whatever is calling the targeted method. There is really only 1 way to use them and there are only 3 attributes. Example: //This is the "calling method": the method that is calling the target method public void doProcess() ...

Write-Host "Hello World" Introduction to PowerShell

System.Console.WriteLine("Hello World");