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JSON may have complex structure with inner arrays. In this example, we have array of orders with nested sub array of OrderItems. declare @json nvarchar(4000) = N'[ {"Number":"SO43659","Date":"2011-05-31T00:00:00", "Items":[{"Price"...

In SQL Server, there are two categories of triggers: DDL Triggers and DML Triggers. DDL Triggers are fired in response to Data Definition Language (DDL) events. These events primarily correspond to Transact-SQL statements that start with the keywords CREATE, ALTER and DROP. DML Triggers are fired ...

SQL Server 2012 It converts value to specified data type and if conversion fails it returns NULL. For example, source value in string format and we need date/integer format. Then this will help us to achieve the same. Syntax: TRY_CONVERT ( data_type [ ( length ) ], expression [, style ] ) TRY_CON...

When you convert expressions from one type to another, in many cases there will be a need within a stored procedure or other routine to convert data from a datetime type to a varchar type. The Convert function is used for such things. The CONVERT() function can be used to display date/time data in v...

// Define new router group $api = new \Phalcon\Mvc\Router\Group([ 'module' => 'api', ]); $api->setPrefix('/api/v1'); // API routes (Maps to Cotnroller::Action) $api->addGet('/users', 'Users::index'); $api->addGet('/users/search/{query}', 'Users::search'); $api->addGet('/...

In this example every positioned element creates its own stacking context, because of their positioning and z-index values. The hierarchy of stacking contexts is organized as follows: Root DIV #1 DIV #2 DIV #3 DIV #4 DIV #5 DIV #6 It is important to note that DIV #4, DIV #5 and D...

A list consists of <li> elements inside a containing element (<ul> or <ol>). Both the list items and the container can have margins and paddings which influence the exact position of the list item content in the document. The default values for the margin and padding may be differe...

Using the overflow property with a value different to visible will create a new block formatting context. This is useful for aligning a block element next to a floated element. CSS img { float:left; margin-right: 10px; } div { overflow:hidden; /* creates block formatting context...

Its possible to change *.vmoptions and idea.properties files without editing them in the PhpStorm installation folder. Follow the steps below: Step 1: Run Help - Edit Custom VM Options... Step 2: Confirm the creation of the configuration file, if prompted Step 3: Add following lines if yo...

This is an Education From in Symfony to take user education details. We wanted to apply validation on 2 fields, education end date and is currently studying. On Post Submit Event, We will check two things 1 - if the user checks the checkbox of is_currently studying then end date should be empty ...

To start the registration for push notifications you need to execute the below code. // registers for push var settings = UIUserNotificationSettings.GetSettingsForTypes( UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound, new NSSet()); ...

Implementation on Android is a bit more work and requires a specific Service to be implemented. First lets check if our device is capable of receiving push notifications, and if so, register it with Google. This can be done with this code in our MainActivity.cs file. protected override void OnCrea...

On Windows Phone something like the code underneath needs to be implemented to start working with push notifications. This can be found in the App.xaml.cs file. protected async override void OnLaunched(LaunchActivatedEventArgs e) { var channel = await PushNotificationChannelManager.CreatePush...

By default, PHP will tell the world what version of PHP you are using, e.g. X-Powered-By: PHP/5.3.8 To fix this you can either change php.ini: expose_php = off Or change the header: header("X-Powered-By: Magic"); Or if you'd prefer a htaccess method: Header unset X-Powered-By ...

This example shows how to perform basic mathematical operations using BigDecimals. 1.Addition BigDecimal a = new BigDecimal("5"); BigDecimal b = new BigDecimal("7"); //Equivalent to result = a + b BigDecimal result = a.add(b); System.out.println(result); Result : 12 ...

NULL is a special case when it comes to comparisons. Assume the following data. id someVal ---- 0 NULL 1 1 2 2 With a query: SELECT id FROM table WHERE someVal = 1 would return id 1 SELECT id FROM table WHERE someVal <> 1 would return id 2 SELECT id FROM tabl...

Python follows PEMDAS rule. PEMDAS stands for Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction. Example: >>> a, b, c, d = 2, 3, 5, 7 >>> a ** (b + c) # parentheses 256 >>> a * b ** c # exponent: same as `a * (b ** c)` 7776 >>...

When performance is a concern, invoking a method via reflection (i.e. via the MethodInfo.Invoke method) is not ideal. However, it is relatively straightforward to obtain a more performant strongly-typed delegate using the Delegate.CreateDelegate function. The performance penalty for using reflecti...

IMP is a C type referring to the implementation of a method, also known as an implementation pointer. It is a pointer to the start of a method implementation. Syntax: id (*IMP)(id, SEL, …) IMP is defined by: typedef id (*IMP)(id self,SEL _cmd,…); To access this IMP, the message “methodForSe...

When creating a timer, you can set the userInfo parameter to include information that you want to pass to the function you call with the timer. By taking a timer as a parameter in said function, you can access the userInfo property. NSDictionary *dictionary = @{ @&quo...