Tutorial by Examples: io

iOS implementation

The interface you defined needs to be implemented in every targeted platform. For iOS this is done through the AVFoundation framework. The following implementation of the ITextToSpeech interface handles speaking a given text in English. using AVFoundation; public class TextToSpeechiOS : ITextToS...

Xamarin.Forms • DependencyService

Android implementation

The Android specific implementation is a bit more complex because it forces you to inherit from a native Java.Lang.Object and forces you to implement the IOnInitListener interface. Android requires you to provide a valid Android context for a lot of the SDK methods it exposes. Xamarin.Forms exposes ...

Xamarin.Forms • DependencyService

Map Collection Cheatsheet

Note that this deals with the creation of a collection of type Map, which is distinct from the map method. Map Creation Map[String, Int]() val m1: Map[String, Int] = Map() val m2: String Map Int = Map() A map can be considered a collection of tuples for most operations, where the first e...

Scala Language • Collections

Configuration

Sitecore ships with a set of standard indexes pre-configured which you can extend, or you can define your own. Of the pre-configured, sitecore_master_index & sitecore_web_index are of most interest for your site search. These are the predefined indexes for all of your Sitecore items in the tree ...

sitecore • Search

Random with gaussian distribution

The Math.random() function should give random numbers that have a standard deviation approaching 0. When picking from a deck of card, or simulating a dice roll this is what we want. But in most situations this is unrealistic. In the real world the randomness tends to gather around an common normal...

JavaScript • Arithmetic (Math)

Simple Many To Many Relationship.

class Person(models.Model): name = models.CharField(max_length=50) description = models.TextField() class Club(models.Model): name = models.CharField(max_length=50) members = models.ManyToManyField(Person) Here we define a relationship where a club has many Persons and memb...

Django • Many-to-many relationships

Functions of more than one parameter

In F#, all functions take exactly one parameter. This seems an odd statement, since it's trivially easy to declare more than one parameter in a function declaration: let add x y = x + y But if you type that function declaration into the F# interactive interpreter, you'll see that its type signat...

F# • Functions

Basics of functions

Most functions in F# are created with the let syntax: let timesTwo x = x * 2 This defines a function named timesTwo that takes a single parameter x. If you run an interactive F# session (fsharpi on OS X and Linux, fsi.exe on Windows) and paste that function in (and add the ;; that tells fsharpi ...

F# • Functions

Synchronization Primitive: Event

Concept Use an Event to synchronize the scheduling of multiple coroutines. Put simply, an event is like the gun shot at a running race: it lets the runners off the starting blocks. Example import asyncio # event trigger function def trigger(event): print('EVENT SET') event.set() #...

Python Language • Asyncio Module

Installing Electrify for a Meteor application

Electron ports HTML web applications to native applications for a range of devices, including creating native desktop applications. It's also very easy to get started! To begin, we must have electron, nodejs, npm, git and meteor installed. Familiarity with these tools is vital for working with Mete...

meteor • Electrify - Compiling Meteor as a Locally Installable App

Using Electrify on a Meteor Application

Let's download a Meteor Todos example project, using a Linux shell (command line) script, to test out Electrifying a project for the first time: Requirements for this section: Git apt-get install git-all There are many ways to install Git. Check them out here. git is a version control sys...

meteor • Electrify - Compiling Meteor as a Locally Installable App

Installation or Setup

Installing Angular Material npm npm install angular-material --save bower bower install angular-material --save jspm jspm install angular-material From Cloud cdnjs | jsdelivr | googlecdn Getting Started (blank shell) <html lang="en"> <head> <meta name...

angular-material • Getting started with angular-material

Integer Conversions in Function Calls

Given that the function has a proper prototype, integers are widened for calls to functions according to the rules of integer conversion, C11 6.3.1.3. 6.3.1.3 Signed and unsigned integers When a value with integer type is converted to another integer type other than _Bool, if the value can be r...

C Language • Implicit and Explicit Conversions

Pointer Conversions in Function Calls

Pointer conversions to void* are implicit, but any other pointer conversion must be explicit. While the compiler allows an explicit conversion from any pointer-to-data type to any other pointer-to-data type, accessing an object through a wrongly typed pointer is erroneous and leads to undefined beh...

C Language • Implicit and Explicit Conversions

Simple data bounded selection

var myData = [ { name: "test1", value: "ok" }, { name: "test2", value: "nok" } ] // We have to select elements (here div.samples) // and assign data. The second parameter of data() is really important, // it will determine the "key" t...

d3.js • Selections

Concatenation Operations

Concatenation refers to the operation of appending one sequence to another. Concat Concatenates two sequences to form one sequence. Method Syntax // Concat var numbers1 = new int[] { 1, 2, 3 }; var numbers2 = new int[] { 4, 5, 6 }; var numbers = numbers1.Concat(numbers2); // number...