Tutorial by Examples: ti

To get a value from the map, you just have to do something like:00 value := mapName[ key ] If the map contains the key, it returns the corresponding value. If not, it returns zero-value of the map's value type (0 if map of int values, "" if map of string values...) m := map[string]s...

Executing code after 1.5 seconds: Handler handler = new Handler(); handler.postDelayed(new Runnable() { @Override public void run() { //The code you want to run after the time is up } }, 1500); //the time you want to delay in milliseconds Executing code repeatedly every...

It is possible to create a function that accepts objects that implement a specific trait. Static Dispatch fn generic_speak<T: Speak>(speaker: &T) { println!("{0}", speaker.speak()); } fn main() { let person = Person {}; let dog = Dog {}; generic_speak(...

__FUNCTION__ returns only the name of the function whereas __METHOD__ returns the name of the class along with the name of the function: <?php class trick { public function doit() { echo __FUNCTION__; } public function doitagain() { echo __METHOD_...

To switch between time zones, you need datetime objects that are timezone-aware. from datetime import datetime from dateutil import tz utc = tz.tzutc() local = tz.tzlocal() utc_now = datetime.utcnow() utc_now # Not timezone-aware. utc_now = utc_now.replace(tzinfo=utc) utc_now # Timezon...

int[] arr = new int[] { 0, 10, 20, 30}; // Get Console.WriteLine(arr[2]); // 20 // Set arr[2] = 100; // Get the updated value Console.WriteLine(arr[2]); // 100

Support for type hinting array parameters (and return values after PHP 7.1) was added in PHP 5.1 with the keyword array. Any arrays of any dimensions and types, as well as empty arrays, are valid values. Support for type hinting callables was added in PHP 5.4. Any value that is_callable() is valid ...

Since PHP objects don't inherit from any base class (including stdClass), there is no support for type hinting a generic object type. For example, the below will not work. <?php function doSomething(object $obj) { return $obj; } class ClassOne {} class ClassTwo {} $classOne= new...

Type hinting for classes and interfaces was added in PHP 5. Class type hint <?php class Student { public $name = 'Chris'; } class School { public $name = 'University of Edinburgh'; } function enroll(Student $student, School $school) { echo $student->name . ' is b...

const readline = require('readline'); const rl = readline.createInterface({ input: process.stdin, output: process.stdout }); rl.question('What is your name?', (name) => { console.log(`Hello ${name}!`); rl.close(); });

Objects will often depend on other objects. Instead of creating the dependency in the constructor, the dependency should be passed into the constructor as a parameter. This ensures there is not tight coupling between the objects, and enables changing the dependency upon class instantiation. This has...

Detailed instructions on getting spring-security set up or installed.

Note: GRAILS requires a Java JDK installed (a runtime environment JRE is not sufficient) on your system, before setting up Grails. Please refer to, how to install JDK. As of this writing, it is recommended to install the latest JDK. For Mac OSX, Linux, Cygwin, Solaris and FreeBSD: The simplest w...

There are multiple threads in your code and you need to safely communicate between them. You can use a Queue from the queue library. from queue import Queue from threading import Thread # create a data producer def producer(output_queue): while True: data = data_computation() ...

Cocoa is Apple's API to develop apps for macOS, formerly known as OS X. Cocoa is a container framework, and contains three sub-frameworks. Foundation AppKit CoreData Cocoa Touch is Apple's version of Cocoa to develop apps for iOS, watchOS and tvOS. Cocoa Touch contains the same sub-framewo...

Multiple rows can be inserted with a single insert command: INSERT INTO tbl_name (field1, field2, field3) VALUES (1,2,3), (4,5,6), (7,8,9); For inserting large quantities of data (bulk insert) at the same time, DBMS-specific features and recommendations exist. MySQL - LOAD DATA INFILE MSSQL - B...

If you need a completely customized view, you'll need to subclass View (the superclass of all Android views) and provide your custom sizing (onMeasure(...)) and drawing (onDraw(...)) methods: Create your custom view skeleton: this is basically the same for every custom view. Here we create the...

public class LogActionFilter : ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { Log("OnActionExecuting", filterContext.RouteData); } public override void OnActionExecuted(ActionExecute...

The PrettyPrinter utility will 'pretty print' XML documents. The following code snippet pretty prints unformatted xml: import scala.xml.{PrettyPrinter, XML} val xml = XML.loadString("<a>Alana<b><c>Beth</c><d>Catie</d></b></a>") val formatt...

Abstract classes are classes that are meant to be inherited but avoid implementing specific methods, leaving behind only method signatures that subclasses must implement. Abstract classes are useful for defining and enforcing class abstractions at a high level, similar to the concept of interfaces ...