Tutorial by Examples: basics

Most basic steps for purchasing/subscribing a user to an IAP

Assuming you know the productID: First import StoreKit Then in your code let productID: Set = ["premium"] let request = SKProductsRequest(productIdentifiers: productID) request.delegate = self request.start() and in the SKProductsRequestDelegate: func productsRequest(request: ...

iOS • In-App Purchase

Basic Setup

mock-data.ts Create the mock api data export class MockData { createDb() { let mock = [ { id: '1', name: 'Object A' }, { id: '2', name: 'Object B' }, { id: '3', name: 'Object C' }, { id: '4', name: 'Object D' } ]; return {mock}; } } main.t...

Angular 2 • Angular2 In Memory Web API

Basics

CSS Here are the minimum CSS rules that Google advises you to use, in a separate CSS file, or within an HTML style tag, e.g. <style type="text/css">...</style>. html, body { height: 100%; margin: 0; padding: 0; } #map { height: 400px; } HTML Goo...

google-maps-api-3 • Getting started with google-maps-api-3

Basic Selenium testcase

This is a basic example of a Selenium testcase using the python Unittest library from selenium import webdriver import unittest class SeleniumTest(Unittest.testcase): def setUp(self): self.driver = webdriver.Chrome() self.driver.implicitly_wait(30) def te...

selenium • Getting started with Selenium in python

The Basics - HTML DOM vs Virtual DOM

HTML DOM is Expensive Each web page is represented internally as a tree of objects. This representation is called Document Object Model. Moreover, it is a language-neutral interface that allows programming languages (such as JavaScript) to access the HTML elements. In other words The HTML DOM...

React • Performance

Basic supervisor with one worker process

This example uses the map format introduced in Erlang/OTP 18.0. %% A module implementing a supervisor usually has a name ending with `_sup`. -module(my_sup). -behaviour(supervisor). %% API exports -export([start_link/0]). %% Behaviour exports -export([init/1]). start_link() -> ...

Erlang Language • Supervisors

Basics of framebuffers

Framebuffer is a type of buffer which stores color values, depth and stencil information of pixels in memory. When you draw something in OpenGL the output is stored in the default framebuffer and then you actually see the color values of this buffer on screen. You can also make your own framebuffer ...

opengl • Framebuffers

Aurelia CLI Basics Explained

This Example assumes you setup as explained in Example: Setting Up Environment for aurelia-cli Explained of this document. Creating a new project In main host os, open terminal (Mac OS in my case) $cd /path/to/project/vagrant $vagrant up (Launches VM GUI) Log into VM via UI U...

aurelia • Aurelia CLI Explained

Array basics

Creating a new array is slightly confusing, as there is no real identifier for an array in awk. So, an array cannot really be initialised with our AWK code. An array in awk is associative, meaning that any string or number can be a key. This means that the array is more like a key-value pair dictio...

awk • Arrays

The Basics

const correctness is the practice of designing code so that only code that needs to modify an instance is able to modify an instance (i.e. has write access), and conversely, that any code that doesn't need to modify an instance is unable to do so (i.e. only has read access). This prevents the insta...

C++ • Const Correctness

Quicksort Basics

Quicksort is a sorting algorithm that picks an element ("the pivot") and reorders the array forming two partitions such that all elements less than the pivot come before it and all elements greater come after. The algorithm is then applied recursively to the partitions until the list is so...

algorithm • Quicksort

Knapsack Problem Basics

The Problem: Given a set of items where each item contains a weight and value, determine the number of each to include in a collection so that the total weight is less than or equal to a given limit and the total value is as large as possible. Pseudo code for Knapsack Problem Given: Values(arr...

algorithm • Knapsack Problem

A basic SinglyLinkedList example in Java

A basic implementation for singly-linked-list in java - that can add integer values to the end of the list, remove the first value encountered value from list, return an array of values at a given instant and determine whether a given value is present in the list. Node.java package com.example.so....

data-structures • Linked List

2. String Manipulation Basics

'Base string Dim exStr : exStr = " <Head>data</Head> " 'Left Dim res: res = Left(exStr,6) 'res now equals " <Head" 'Right Dim res: res = Right(exStr,6) 'res now equals "Head> " 'Mid Dim res: res = Mid(exStr,8,4) 'res now equals "data&quot...

vbscript • Strings

Basic scan usage

scan is used for calling function multiple times over a list of values, the function may contain state. scan syntax (as of theano 0.9): scan( fn, sequences=None, outputs_info=None, non_sequences=None, n_steps=None, truncate_gradient=-1, go_backwards=False, m...

theano • Loops with theano

1. Basics

Service broker is technology based on asyncronous communication between two(or more) entities. Service broker consists of: message types, contracts, queues, services, routes, and at least instance endpoints More: https://msdn.microsoft.com/en-us/library/bb522893.aspx

Microsoft SQL Server • Service broker

3. Create basic service broker construction on database (single database communication)

USE [MyDatabase] CREATE MESSAGE TYPE [//initiator] VALIDATION = WELL_FORMED_XML; GO CREATE CONTRACT [//call/contract] ( [//initiator] SENT BY INITIATOR ) GO CREATE QUEUE InitiatorQueue; GO CREATE QUEUE TargetQueue; GO CREATE SERVICE InitiatorService ON QUEUE...

Microsoft SQL Server • Service broker

Dependency injection basics

Almost any controller needs some external dependencies to work. Here is a way to configure a dependency object (or its factory) and pass it to a controller. Doing so will help to sustain a separation of concerns, keep code clear and testable. Say, we have an interface and its implementation that...

asp.net-core-mvc • Getting started with asp.net-core-mvc

Basic state with AASM

Usually you'll end up creating models which will contain a state, and that state will be changing during the lifespan of the object. AASM is a finite state machine enabler library that can help you out with dealing with having an easy passing through the process design of your objects. Having some...

Ruby on Rails • Model states: AASM

Basic static files and favicon serve example

var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var app = express(); app.use(favicon(__dirname + '/public/img/favicon.ico')); app.use(express.static(path.join(__dirname, 'public'))); app.listen(3000, function() { console.log("...

express • Handling static files