Tutorial by Examples: p

Animating between multiple states

The <div> in this template grows to 50px and then 100px and then shrinks back to 20px when you click the button. Each state has an associated style described in the @Component metadata. The logic for whichever state is active can be managed in the component logic. In this case, the component...

Angular 2 • Animation

AutoComplete with CustomAdapter, ClickListener and Filter

Main layout : activity_main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/activity_main" android:layout_width="match_parent" android:layo...

Android • AutoCompleteTextView

Data Type: Auto

This example shows the basic type inferences the compiler can perform. auto a = 1; // a = int auto b = 2u; // b = unsigned int auto c = &a; // c = int* const auto d = c; // d = const int* const auto& e = b; // e = const unsigned int& auto x = a...

C++ • Type Inference

Loops and auto

This example shows how auto can be used to shorten type declaration for for loops std::map<int, std::string> Map; for (auto pair : Map) // pair = std::pair<int, std::string> for (const auto pair : Map) // pair = const std::pair<int, std::string> for (c...

C++ • Type Inference

Chain of responsibility

In object-oriented design, the chain-of-responsibility pattern is a design pattern consisting of a source of command objects and a series of processing objects. Each processing object contains logic that defines the types of command objects that it can handle; the rest are passed to the next proce...

Swift Language • Design Patterns - Creational

Example

ASPX <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt...

ASP.NET • View State

Example

ASP.NET • WebForms

Example

Basic KatanaConsole Application namespace KatanaConsole { // use an alias for the OWIN AppFunc: using AppFunc = Func<IDictionary<string, object>, Task>; class Program { static void Main(string[] args) { WebApp.Start<Startup>(&...

ASP.NET • Katana

Hyperlink

The HyperLink control is used to navigate from the client to another page. <html> <script language="VB" runat="server"> Sub Page_Load(sender As Object, e As EventArgs) ' Set hyperlink to "~", which indicates application root. Hyper...

ASP.NET • WebForms

Expression Basics

Expressions in Java are the primary construct for doing calculations. Here are some examples: 1 // A simple literal is an expression 1 + 2 // A simple expression that adds two numbers (i + j) / k // An expression with multiple operations (flag) ? c : d // An...

Java Language • Expressions

Import existing repository to Bitbucket

Go to the repository you want to clone (something like: https://bitbucket.org/username/repo) On the top menu, choose Repository -> Import repository In the Old repository section, enter the source (CodePlex, Git, Google Code, Mercurial, Source Code, Subversion) and the URL In the New reposi...

bitbucket • Import repository into Bitbucket

Classes and Multiple Inheritance

Swift does not support multiple inheritance. That is, you cannot inherit from more than one class. class Animal { ... } class Pet { ... } class Dog: Animal, Pet { ... } // This will result in a compiler error. Instead you are encouraged to use composition when creating your types. This can b...

Swift Language • Classes

A simple Hive UDF within Apache Spark

import org.apache.spark.sql.functions._ // Create a function that uses the content of the column inside the dataframe val code = (param: String) => if (param == "myCode") 1 else 0 // With that function, create the udf function val myUDF = udf(code) // Apply the udf to a column in...

Scala Language • User Defined Functions for Hive

Show a div from same page as message

This a sample code which will show you how you can create dynamic code which will generate a bootstrap model at run time. This also includes deciding modal title body content and buttons in footer. HTML code <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css&...

bootstrap-modal • Examples to Show bootstrap model with different attributes and Controls

Global Exception Handling in ASP.NET Core

UseExceptionHandler can be used to handle exceptions globally. You can get all the details of exception object like Stack Trace, Inner exception and others. And then you can show them on screen. You can easily implement like this. app.UseExceptionHandler( options => { options.Run( as...

asp.net-core • Error Handling

Example: Consider will have two threads T1 and T2.

How do you detect them? If the same variable/resource/memory location is accessible by multiple threads and at least of the thread is changing the value of variable/resource/memory location, then Race Condition can occurred. Because if a thread is changing the value of variable/resource/memory ...

pthreads • Race condition in pthreads

(De-)Initialization of openssl library

Overview Openssl consists of 2 libraries: libcrypto and libssl. Before openssl API can be used in an application, mandatory initialization procedures are expected to be performed. Once application is done with openssl related work, it is expected to cleanup allocated resources. Code below does com...

openssl • Getting started with openssl

IOS 10 Permission required for accessing Camera, Photo library ....

iOS 10 Now Requires User Permission to Access Media Library, Photos, Camera and other Hardware like these. The solution for this is to add their keys into info.plist with description for user that how we are using their data , iOS already required permissions to access microphone, camera, and m...

ios10 • iOS 10 - Changes in asking permissions of Camera,Photo Library causing application to crash

Using and misusing GROUP BY

SELECT item.item_id, item.name, /* not SQL-92 */ COUNT(*) number_of_uses FROM item JOIN uses ON item.item_id, uses.item_id GROUP BY item.item_id will show the rows in a table called item, and show the count of related rows in a table called uses. This works well, but unfo...

MySQL • Error 1055: ONLY_FULL_GROUP_BY: something is not in GROUP BY clause ...

Misusing GROUP BY to return unpredictable results: Murphy's Law

SELECT item.item_id, uses.category, /* nonstandard */ COUNT(*) number_of_uses FROM item JOIN uses ON item.item_id, uses.item_id GROUP BY item.item_id will show the rows in a table called item, and show the count of related rows in a table called uses. It will also show the va...

MySQL • Error 1055: ONLY_FULL_GROUP_BY: something is not in GROUP BY clause ...