Tutorial by Examples: pt

HTML also provides the tables with the <thead>, <tbody>, <tfoot>, and <caption> elements. These additional elements are useful for adding semantic value to your tables and for providing a place for separate CSS styling. When printing out a table that doesn't fit onto one (pa...
When you create an argparse ArgumentParser() and run your program with '-h' you get an automated usage message explaining what arguments you can run your software with. By default, positional arguments and conditional arguments are separated into two categories, for example, here is a small script ...
Say you have implemented some logic to detect attempts to modify an object in the database while the client that submitted changes didn't have the latest modifications. If such case happens, you raise a custom exception ConfictError(detailed_message). Now you want to return an HTTP 409 (Confict) st...
We can optimize a simple xor function for only architectures that support unaligned reads/writes by creating two files that define the function and prefixing them with a build constraint (for an actual example of the xor code which is out of scope here, see crypto/cipher/xor.go in the standard libra...
The prop-types package allows you to add runtime type checking to your component that ensures the types of the props passed to the component are correct. For instance, if you don't pass a name or isYummy prop to the component below it will throw an error in development mode. In production mode the p...
<cfscript> /*define collection*/ attributes = { "name": "Sales", "type": "text", "value": "Connection" }; for(attribute in attributes){ /* attribute variable will contain the key name of each key value ...
ClientContext clientContext = new ClientContext(siteUrl); Web oWebsite = context.Web; oWebsite.Title = "Updated Web Site"; oWebsite.Description = "This is an updated Web site."; oWebsite.Update(); clientContext.ExecuteQuery();
ClientContext oClientContext = new ClientContext("http://MyServer/sites/MySiteCollection/MyWebSite"); Web oWebsite = clientContext.Web; GroupCreationInformation groupCreationInfo = new GroupCreationInformation(); groupCreationInfo.Title = "My New Group"; groupCreationInfo.D...
Programs throw errors when for instance wrong input is given. Because of this, one needs to make sure that an error is thrown when actual wrong input is given. Because of that we need to check for an exact exception, for this example we will use the following exception: class WrongInputException(Ex...
The following example is an introduction to: Template compilation using underscore Accessing variables in a template Creating a view Rendering a view Showing a view <html> <head> <script src="https://code.jquery.com/jquery-3.1.0.min.js"></script> ...
Higher-order functions can be used to ensure that system resources are disposed, even when a treatment raises an exception. The pattern used by with_output_file allows a clean separation of concerns: the higher-order with_output_file functions takes care of managing the system resources bound to fi...
A selectable item in a select list. <ul role="listbox"> <li role="option">Option 1</li> <li role="option">Option 2</li> <li role="option">Option 3</li> </ul>
propTypes allows you to specify what props your component needs and the type they should be. Your component will work without setting propTypes, but it is good practice to define these as it will make your component more readable, act as documentation to other developers who are reading your compone...
Assuming that you have successfully created a JFrame and that Swing has been imported... You can import Swing entirely import javax.Swing.*; or You can import the Swing Components/Frame that you intend to use import javax.Swing.Jframe; import javax.Swing.JButton; Now down to adding the J...
git does not recognice the concept of folders, it just works with files and their filepaths. This means git does not track empty folders. SVN, however, does. Using git-svn means that, by default, any change you do involving empty folders with git will not be propagated to SVN. Using the --rmdir fl...
enable_shared_from_this enables you to get a valid shared_ptr instance to this. By deriving your class from the class template enable_shared_from_this, you inherit a method shared_from_this that returns a shared_ptr instance to this. Note that the object must be created as a shared_ptr in first pl...
This example shows how to use a request interceptor with OkHttp. This has numerous use cases such as: Adding universal header to the request. E.g. authenticating a request Debugging networked applications Retrieving raw response Logging network transaction etc. Set custom user agent Retrof...
PHP makes it easy to get data from your results and loop over it using a while statement. When it fails to get the next row, it returns false, and your loop ends. These examples work with mysqli_fetch_assoc - Associative array with column names as keys mysqli_fetch_object - stdClass object with ...
Some example cases when the result is an optional. var result: AnyObject? = someMethod() switch result { case nil: print("result is nothing") case is String: print("result is a String") case _ as Double: print("result is not nil, any value that is a Dou...
Before C++17, having pointers with a value of nullptr commonly represented the absence of a value. This is a good solution for large objects that have been dynamically allocated and are already managed by pointers. However, this solution does not work well for small or primitive types such as int, w...

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