Tutorial by Examples: p

Use let or also to simplify working with nullable objects

let in Kotlin creates a local binding from the object it was called upon. Example: val str = "foo" str.let { println(it) // it } This will print "foo" and will return Unit. The difference between let and also is that you can return any value from a let block. also ...

Azure Active Directory B2C implementation using ADAL Cordova Plugin

Refer the example here: https://github.com/NewtonJoshua/Azure-ADB2C-Angularjs-sample Azure AD B2C Azure AD B2C is a cloud identity management solution for your web and mobile applications. It is a highly available global service that scales to hundreds of millions of identities. Mobile app - ADAL...

How to connect Google Cloud SQL with Apps (like Google App Engine) and Tools like (mySQL workbench)?

In this document we'll see how to create a Google Cloud SQL Instance and connect them in your Google App Engine application and MySQL Workbench admin tool. Google Cloud SQL: Google Cloud SQL is a fully-managed database service that makes it easy to set-up, maintain, manage and administer your rela...

Use apply to initialize objects or to achieve method chaining

The documentation of apply says the following: calls the specified function block with this value as its receiver and returns this value. While the kdoc is not so helpful apply is indeed an useful function. In layman's terms apply establishes a scope in which this is bound to the object you ca...

HTML example using requireJS CDN to include an already compiled TypeScript file.

<body onload="__init();"> ... <script src="http://requirejs.org/docs/release/2.3.2/comments/require.js"></script> <script> function __init() { require(["view/index.js"]); } </script> </body>...

tsconfig.json example to compile to view folder using requireJS import style.

{ "module": "amd", // Using AMD module code generator which works with requireJS "rootDir": "./src", // Change this to your source folder "outDir": "./view", ... }

Camel Domain Specific Language

Camel's DSL (Domain Specific Language) is one of the features that makes Camel standout from other Integration frameworks. While some other frameworks also feature a DSL concept, typically in the form of a XML file, the DSL was in such cases always a custom based language. Camel offers multiple DSL...

Sync adapter with every min requesting value from server.

<provider android:name=".DummyContentProvider" android:authorities="sample.map.com.ipsyncadapter" android:exported="false" /> <!-- This service implements our SyncAdapter. It needs to be exported, so that the system sync f...

Computing the Hamming weight of a vector

-- loop-based version function hw_loop(v: std_logic_vector) return natural is variable h: natural; begin h := 0; for i in v'range loop if v(i) = '1' then h := h + 1; end if; end loop; return h; end function hw_loop; -- recursive version function hw_tree(v: std_...

Text formatting Properties

There are a number of properties that can be applied to sections of RichText. var title = cell.RichText.Add("This is my title"); // Data Type: bool // Default Value: false title.Bold = true; // Data Type: System.Drawing.Color // Default Value: Color.Black title.Color = C...

Enable disk persistence (Android / iOS only)

To enable disk persistence you should enable the flag persistenceEnabled in the FirebaseDatabaseInstance object of your application: Android FirebaseDatabase.getInstance().setPersistenceEnabled(true); iOS Database.database().isPersistenceEnabled = true //Swift [FIRDatabase database].persisten...

Keeping data fresh (Android/iOs Only)

Firebase synchronizes and stores a local copy of the data for active listeners when used on mobile devices. In addition, you can keep specific locations in sync. Android : DatabaseReference workoutsRef = FirebaseDatabase.getInstance().getReference("workouts"); scoresRef.keepSynced(true)...

Installation Drupal 7 in steps

Step 1: Download and extract Drupal Drupal is available in two supported versions: the most recent and the previous. Currently that is Drupal 8 (released November 2015) and Drupal 7. The Recommended releases are the latest stable releases of either version. To learn more about versions, see the Dru...

Parallelize repetitive tasks on list of files

Many repetitive jobs can be performed more efficiently if you utilize more of your computer's resources (i.e. CPU's and RAM). Below is an example of running multiple jobs in parallel. Suppose you have a < list of files >, say output from ls. Also, let these files are bz2 compressed and the fo...

Parallelize STDIN

Now, let's imagine we have 1 large file (e.g. 30 GB) that needs to be converted, line by line. Say we have a script, convert.sh, that does this <task>. We can pipe contents of this file to stdin for parallel to take in and work with in chunks such as <stdin> | parallel --pipe --block &l...

Write to standard error output using Console

var sourceFileName = "NonExistingFile"; try { System.IO.File.Copy(sourceFileName, "DestinationFile"); } catch (Exception e) { var stdErr = Console.Error; stdErr.WriteLine($"Failed to copy '{sourceFileName}': {e.Message}"); }

Read from standard error of child process

var errors = new System.Text.StringBuilder(); var process = new Process { StartInfo = new ProcessStartInfo { RedirectStandardError = true, FileName = "xcopy.exe", Arguments = "\"NonExistingFile\" \"DestinationFile\"", ...

render multiple variables

For rendering multiple props or variables we can use ``. render() { let firstName = 'test'; let lastName = 'name'; return ( <View style={styles.container}> <Text>{`${firstName} ${lastName}` } </Text> </View> ); } Output: te...

built in server with specific directory and router script

php -S localhost:80 -t project/public router.php PHP 7.1.7 Development Server started at Fri Jul 14 15:22:25 2017 Listening on http://localhost:80 Document root is /home/project/public Press Ctrl-C to quit.

The PX(DB)DateAndTime Attribute

The PXDBDateAndTime attribute and the PXDateAndTime attribute are designed to work with a DAC field of the Nullable<DateTime> (DateTime?) type and store both date and time value parts inside a single field: #region UsrDateAndTime public abstract class usrDateAndTimeAttribute : IBqlField { }...

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