Tutorial by Examples: d

This Documentation is a small summary of the offical one Prerequisites Your PC must be running a 64-bit version of Windows 10 Anniversary Update build 14393 or later To find your PC's CPU architecture and Windows version/build number, open Settings>System>About. Look for the OS Build ...

This chapter describes how to set up a Docker Container with Jenkins inside, which is capable of sending Docker commands to the Docker installation (the Docker Daemon) of the Host. Effectively using Docker in Docker. To achieve this, we have to build a custom Docker Image which is based on an arbitr...

This tag is a duplicate of playframework. Please post any content that you would post here in that tag, with the version set to “2.0”

You can also use this code to setup an LED with a button switch with a pull up resistor, this could preferably be with the next step after setting up the intial LED controller int buttonState = 0; // variable for reading the pushbutton status void setup() { // initialize the LED pin as an ...

Joda-Time is a robust alternative to the Java date and time classes. Prior to Java SE 8, the standard Java date and time classes like java.util.Calendar are difficult to use and prone to errors. Joda-Time emerged as the de-facto standard library for date and time manipulation in many open-source-pr...

We can now write the following HelloJoda program! import org.joda.time.LocalDate; public class HelloJoda { public static void main(String [] args) { LocalDate today = LocalDate.now(); System.out.println("Hello Joda! Today's date is: " + today); } } Whi...

Adding the aurelia-configuration to a cli application sometimes produces a build error. This is caused by a missing dependency so we simply add the dependency to the build bundle. Try the following: npm install deep-extend --save npm install aurelia-configuration --save Now add the followi...

It's also possible to add multiple object types to a Static Dispatch function. fn mammal_speak<T: Person + Dog>(mammal: &T) { println!("{0}", mammal.speak()); } fn main() { let person = Person {}; let dog = Dog {}; mammal_speak(&person); mammal...

If mapping covariantly over only the first argument, or only the second argument, is desired, then first or second ought to be used (in lieu of bimap). first :: Bifunctor f => (a -> c) -> f a b -> f c b first f = bimap f id second :: Bifunctor f => (b -> d) -> f a b -> f...

A LocalDate is a date without a timezone. Consider using them when you are only concerned with the year, month, and day of month and are not interested in an exact time. For example, when we write our date of birth (such as 1960-01-01) we don't care about the timezone in which it happened.

A given year-month-day: LocalDate oneJanuaryNineteenSixty = new LocalDate(1960,1,1); Today's date: LocalDate today = LocalDate.now() Tomorrow: LocalDate tomorrow = LocalDate.now().plusDays(1); Yesterday: LocalDate yesterday = LocalDate.now().minusDays(1); Two weeks ago: LocalDate tw...

Converting a java.util.Calendar object: Calendar rightNow = Calendar.getInstance(); LocalDate today = LocalDate.fromCalendarFields(rightNow); Converting a java.util.Date object: Date rightNow = new Date(); LocalDate today = LocalDate.fromDateFields(rightNow); Converting a string: String d...

Bifunctor is the class of types with two type parameters (f :: * -> * -> *), both of which can be covariantly mapped over simultaneously. class Bifunctor f where bimap :: (a -> c) -> (b -> d) -> f a b -> f c d bimap can be thought of as applying a pair of fmap operation...

Since Proxy contains no runtime information, there is never a need to pattern-match on the Proxy constructor. So a common idiom is to abstract over the Proxy datatype using a type variable. showread :: forall proxy a. (Show a, Read a) => proxy a -> String -> String showread _ = (show :: a...

In JSX expressions that contain both an opening tag and a closing tag, the content between those tags is passed as a special prop: props.children. There are several different ways to pass children: String Literals You can put a string between the opening and closing tags and props.children will ju...

Alias Declaration are affected by preceding using statements namespace boost { namespace multiprecision { class Number ... } } using namespace boost; // Both Namespace are equivalent namespace Name1 = boost::multiprecision; namespace Name2 = multiprecision; ...

PyMongo is a native Python driver for MongoDB. Install PyMongo pip install pymongo Create a connection Use MongoClient to create a connection. MongoClient defaults to MongoDB instance running on localhost:27017 if not specified. from pymongo import MongoClient client = MongoClient() Acce...

To declare a single namespace with hierarchy use following example: namespace MyProject\Sub\Level; const CONNECT_OK = 1; class Connection { /* ... */ } function connect() { /* ... */ } The above example creates: constant MyProject\Sub\Level\CONNECT_OK class MyProject\Sub\Level\Connection...

MongoDB stores data records as BSON documents. BSON is the binary representation of JSON. $ python >>> from pymongo import MongoClient >>> client = MongoClient() >>> col = client.mydb.test Create Insert a single document insert_one(document) >>> result = ...

Although not necessary in PHP however it is a very good practice to initialize variables. Uninitialized variables have a default value of their type depending on the context in which they are used: Unset AND unreferenced var_dump($unset_var); // outputs NULL Boolean echo($unset_bool ? "tr...