Tutorial by Examples: g

When designing a linked list, you can avoid all the special-cases (empty list, first node, last node, etc) by using a sentry node. Let's see how that is done: struct Node { Node* next; Node* prev; T data; }; // helper function to link 2 nodes void Link(Node* n1, Node* n2) { ...

A simple SELECT query in Linq static void Main(string[] args) { string[] cars = { "VW Golf", "Opel Astra", "Audi A4", "Ford Focus", "Seat Leon&q...

xcrun simctl install booted *.app

In this example we use Tensorflow to count to 10. Yes this is total overkill, but it is a nice example to show an absolute minimal setup needed to use Tensorflow import tensorflow as tf # create a variable, refer to it as 'state' and set it to 0 state = tf.Variable(0) # set one to a constan...

To fetch large data we can use generators in pandas and load data in chunks. import pandas as pd from sqlalchemy import create_engine from sqlalchemy.engine.url import URL # sqlalchemy engine engine = create_engine(URL( drivername="mysql" username="user", ...

GitHub Flavored Markdown (sometimes abbreviated to GFM) makes it easier to work with markdown on GitHub.com. Key features of GFM include: code indentation task list support easy GitHub issue referencing automatic GitHub username and SHA detection automatic url detection emoji support GFM...

import * as React from 'react'; import * as ReactDOM from 'react-dom'; import { Route, BrowserRouter as Router, Link } from 'react-router-dom'; class Home extends React.Component<any, any> { render() { return ( <div> <div>HOME</div> <d...

import * as React from 'react'; import * as ReactDOM from 'react-dom'; import { Route, BrowserRouter as Router, Link, match } from 'react-router-dom'; // define React components for multiple pages class Home extends React.Component<any, any> { render() { return ( <div&g...

This solution is more involved, leveraging custom TypeScript decorators which inject match, history and/or location data into your React.Component class, which gets you full type safety without needing any type guards, as the previous example required. // Routed.ts - defines decorators import { Ro...

Let's say we want to console.log each time the component mounts: hocLogger.js export default function hocLogger(Component) { return class extends React.Component { componentDidMount() { console.log('Hey, we are mounted!'); } render() { return <Component {...this....

Let's say we have a component that should only be displayed if the user is logged in. So we create a HOC that checks for the authentication on each render(): AuthenticatedComponent.js import React from "react"; export function requireAuthentication(Component) { return class Auth...

PageTS Settings: ## Default Image cropping ## TCEFORM.sys_file_reference.crop.config.cropVariants { default { title = Desktop selectedRatio = NaN allowedAspectRatios { NaN { title = Free value = 0.0 } ...

(defrecord Logline [datetime action user id]) (def pattern #"(\d{8}-\d{2}:\d{2}:\d{2}.\d{3})\|.*\|(\w*),(\w*),(\d*)") (defn parser [line] (if-let [[_ dt a u i] (re-find pattern line)] (->Logline dt a u i))) Define a sample line : (def sample "20170426-17:20:04...

The NgFor directive instantiates a template once per item from an iterable. The context for each instantiated template inherits from the outer context with the given loop variable set to the current item from the iterable. To customize the default tracking algorithm, NgFor supports trackBy option. ...

I found this to be the way to properly nest children routes inside the app.routing.ts or app.module.ts file (depending on your preference). This approach works when using either WebPack or SystemJS. The example below shows routes for home, home/counter, and home/counter/fetch-data. The first and l...

Router enables navigation from one view to another based on user interactions with the application. Following are the steps in implementing basic routing in Angular - NOTE: Ensure you have this tag: <base href='/'> as the first child under your head tag in your index.html file. This ele...

Create a service- import {EventEmitter} from 'angular2/core'; export class NavService { navchange: EventEmitter<number> = new EventEmitter(); constructor() {} emitNavChangeEvent(number) { this.navchange.emit(number); } getNavChangeEmitter() { return...

This is a just a simple example of how to use GooglePlay Service's ActivityRecognitionApi. Although this is a great library, it does not work on devices that do not have Google Play Services installed. Docs for ActivityRecognition API Manifest <!-- This is needed to use Activity Recognition! -...

PathSense activity recognition is another good library for devices which don't have Google Play Services, as they have built their own activity recognition model, but requires developers register at http://developer.pathsense.com to get an API key and Client ID. Manifest <application andro...

Create session with User & Sign In to QuickBlox Chat // Initialise Chat service QBChatService chatService = QBChatService.getInstance(); final QBUser user = new QBUser("garrysantos", "garrysantospass"); QBAuth.createSession(user, new QBEntityCallback<QBSession>()...