Tutorial by Examples: g

Structs may be used to implement code in an object oriented manner. A struct is similar to a class, but is missing the functions which normally also form part of a class, we can add these as function pointer member variables. To stay with our coordinates example: /* coordinates.h */ typedef stru...

//Set the row "A" height to 15 double rowHeight = 15; worksheet.Row(1).Height = rowHeight; //Set the column 1 width to 50 double columnWidth = 50; worksheet.Column(1).Width = columnWidth; When Bestfit is set to true, the column will grow wider when a user inputs numbers in a ce...

//create a new ExcelPackage using (ExcelPackage excelPackage = new ExcelPackage()) { //create 2 WorkSheets. One for the source data and one for the Pivot table ExcelWorksheet worksheetPivot = excelPackage.Workbook.Worksheets.Add("Pivot"); ExcelWorksheet worksheetData = exc...

A modeless form is employed (usually) when you need to shows something permanentely alongside your application main screen (think about a legend or an view on a stream of data coming asynchronously from a device or an MDI Child Window). But a modeless form poses an unique challenge when you want t...

When a form is shown using the ShowDialog method, it is necessary to set the form's DialogResult property to close to form. This property can be set using the enum that's also called DialogResult. To close a form, you just need to set the form's DialogResult property (to any value by DialogResult.N...

-- Create a sample JSON with ARRAY create table car_sample(dim_id integer, info varchar(2000)); insert into car_sample values (200, '{"cars": [ { "Manufacturer": "Nissan", "Models": [{"Name":"Sentra", "doors":4}, {"Name&quo...

Typically when loading plugins, make sure to always include the plugin after jQuery. <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script> <script src="some-plugin.min.js"></script> If you must use more than one version of jQuery, then m...

Note: This only works for the built-in keyboard provided by iOS SWIFT: In order for the view of a UIViewController to increase the origin of the frame when it is presented and decrease it when it is hidden, add the following functions to your class: func keyboardWillShow(notification: NSNotificat...

Using an Atomic Group Atomic groups have the format (?>...) with a ?> after the open paren. Consider the following sample text: ABC The regex will attempt to match starting at position 0 of the text, which is before the A in ABC. If a case-insensitive expression (?>a*)abc were used, ...

The break instruction: Using break we can leave a loop even if the condition for its end is not fulfilled. It can be used to end an infinite loop, or to force it to end before its natural end The syntax is break; Example: we often use break in switch cases,ie once a case i switch is satisfied...

Below example changes the opacity of the image based on the "status" parameter. <img class="img-responsive" ng-src="{{imagesrc}}" ng-style="{'opacity' : (status == 2) ? 1 : 0.5}">

I'll start with a really short explanation what is and why use Model-View-ViewModel (MVVM) design pattern in your iOS apps. When iOS first appeared, Apple suggested to use MVC (Model-View-Controller) as a design pattern. They showed it in all of their examples and all first developers were happy us...

Let's say that inside a resources file, you had a file called /icons/ok.png The full url of this file within code is qrc:/icons/ok.png. In most cases, this can be shortened to :/icons/ok.png For example, if you wanted to create a QIcon and set it as the icon of a button from that file, you could u...

Environment Setup: Download android sdk of API level 17 or more Node.js (https://nodejs.org/) Appium software (http://appium.io/) Selenium jars (http://www.seleniumhq.org/download/) Appium jar (https://search.maven.org/#search%7Cga%7C1%7Cg%3Aio.appium%20a%3Ajava-client) .apk file of the appl...

A Reference in C++ is just an Alias or another name of a variable. Just like most of us can be referred using our passport name and nick name. References doesn't exist literally and they don't occupy any memory. If we print the address of reference variable it will print the same address as that of...

SELECT E.EMPLOYEE_ID,E.LAST_NAME,E.MANAGER_ID FROM HR.EMPLOYEES E CONNECT BY PRIOR E.EMPLOYEE_ID = E.MANAGER_ID; The CONNECT BY clause to define the relationship between employees and managers.

SELECT E.LAST_NAME|| ' reports to ' || PRIOR E.LAST_NAME "Walk Top Down" FROM HR.EMPLOYEES E START WITH E.MANAGER_ID IS NULL CONNECT BY PRIOR E.EMPLOYEE_ID = E.MANAGER_ID;

In the following example if someone if someone presses the home button while the task is running, then the task is cancelled. In this particular cancelling it should interrupt if running. public class MainActivity extends AppCompatActivity { private static AtomicBoolean inWork; pri...

Private Const HashTypeMD5 As String = "MD5" ' https://msdn.microsoft.com/en-us/library/system.security.cryptography.md5cryptoserviceprovider(v=vs.110).aspx Private Const HashTypeSHA1 As String = "SHA1" ' https://msdn.microsoft.com/en-us/library/system.security.cryptography.sha1c...

Another variation from the code above gives you more performance when you want to get hash codes of all files from a root folder including all sub folders. Example of Worksheet: Code Option Explicit Private Const HashTypeMD5 As String = "MD5" ' https://msdn.microsoft.com/en-us/libr...