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(ns so-doc.events) (enable-console-print!) (defn click-event [] (println "Button clicked")) (defn load-event [] (println "Page loaded!") (.addEventListener (.getElementById js/document "btn") "click" click-event false)) (.addEventListener ...

$collection = Mage::getModel('catalog/product') ->getCollection() ->setPageSize(20) ->setCurPage(1);

Large scale applications often need different properties when running on different environments. we can achieve this by passing arguments to NodeJs application and using same argument in node process to load specific environment property file. Suppose we have two property files for different enviro...

Separate the construction of a complex object from its representation so that the same construction process can create different representations and and provides a high level of control over the assembly of the objects. In this example demonstrates the Builder pattern in which different vehicles ar...

function positive() { return 0 } function negative() { return 1 }

if true; then echo Always executed fi if false; then echo Never executed fi

Vim plugins are addons that can be used to change or enhance functionality of vim. There is a good list of plugins at vimawesome

Show how to use cv::VideoCapture with e.g. a webcam. Capturing frames from webcam and display it. Here is the example code: #include <iostream> #include "opencv2/highgui/highgui.hpp" #include "opencv2/imgproc/imgproc.hpp" #include "opencv2/core/core.hpp" ...

Sample table (say Employee) structure Column NameDatatypeIDINTF_NameSTRINGL_NameSTRINGPhoneSTRINGAddressSTRING Project all the columns Use wild card * to project all the columns. e.g. Select * from Employee Project selected columns (say ID, Name) Use name of columns in the projection list. e...

Interceptors require the IInterceptor interface. Any public method within the intercepted class will be intercepted (including getters and setters) public class MyInterceptor : IInterceptor { public void Intercept(IInvocation invocation) { //Calls the next method in the chain - T...

Occasionally you will want to access the result of your filters from outside the ng-repeat, perhaps to indicate the number of items that have been filtered out. You can do this using as [variablename] syntax on the ng-repeat. <ul> <li ng-repeat="item in vm.listItems | filter:vm.myF...

This serializer has some nice features that the default .net json serializer doesn't have, like Null value handling, you just need to create the JsonSerializerSettings : public static string Serialize(T obj) { string result = JsonConvert.SerializeObject(obj, new JsonSerializerSettings { NullVa...

You can make a URI parameter optional by adding a question mark to the route parameter. You can also specify a default value by using the form parameter=value. public class BooksController : Controller { // eg: /books // eg: /books/1430210079 [Route(“books/{isbn?}”)] public Act...

Often, the routes in a controller all start with the same prefix. For example: public class ReviewsController : Controller { // eg: /reviews [Route(“reviews”)] public ActionResult Index() { … } // eg: /reviews/5 [Route(“reviews/{reviewId}”)] public ActionResult Show(i...

You can also apply the [Route] attribute on the controller level, capturing the action as a parameter. That route would then be applied on all actions in the controller, unless a specific [Route] has been defined on a specific action, overriding the default set on the controller. [RoutePrefix(“prom...

Route constraints let you restrict how the parameters in the route template are matched. The general syntax is {parameter:constraint}. For example: // eg: /users/5 [Route(“users/{id:int}”] public ActionResult GetUserById(int id) { … } // eg: users/ken [Route(“users/{name}”] public ActionRes...

Pretext This is an introduction to the Hello World program example on the Raspberry Pi written in C. The following example makes use of the command line interface and is set up as a step-by-step guide. Along with creating a Hello World program, the reader will be introduced to simple linux comman...

In the opening section of a bash script, it's possible to define some variables that function as helpers to color or otherwise format the terminal output during the run of the script. Different platforms use different character sequences to express color. However, there's a utility called tput whic...

Example: Customers who can create a post. Each customer can create multiple posts. As soon as customer creates the post, post will be under administrators review. Now we have to fetch the customers list who have all active posts by using sub-query. Note: If a customer has 5 post, among 5 posts if h...

Logs are very important. Recreate an error context can be sometimes very painful due to the lack of information about how and when the error occurred. This example shows: How to add user's data in the error logs How to add post parameters sent when an error occurred How to use WebPr...