Tutorial by Examples: bas

Matching based on class - great for prepareForSegue

You can also make a switch statement switch based on the class of the thing you're switching on. An example where this is useful is in prepareForSegue. I used to switch based on the segue identifier, but that's fragile. if you change your storyboard later and rename the segue identifier, it breaks ...

Swift Language • Switch

1 basic class inheritance example using extends and super keyword

A generic Car class has some car property and a description method class Car{ name:string; engineCapacity:string; constructor(name:string,engineCapacity:string){ this.name = name; this.engineCapacity = engineCapacity; } describeCar(){ console....

TypeScript • Typescript basic examples

Working with local databases using xamarin.forms in visual studio 2015

SQlite example Step by step Explanation The steps below demonstrate how to include this component in a Xamarin.Forms Shared Project: to add packages in (pcl,Andriod,Windows,Ios) Add References Click on Manage Nuget packages ->click on Browse to install SQLite.Net.Core-PCL , SQLite Net Ext...

Xamarin.Forms • Working with local databases

Connect Amazon redshift database and fetch data into Array using Node.js

Best way to connect amazon redshift using JDBC , Use proper driver as per version http://docs.aws.amazon.com/redshift/latest/mgmt/configure-jdbc-connection.html Step-1: npm install jdbc Step-2: var JDBC = require('jdbc'); var jinst = require('jdbc/lib/jinst'); // isJvmCreated will be true afte...

amazon-redshift • Getting started with amazon-redshift

Basic Query methods

Some of the queryFor* methods available in JdbcTemplate are useful for simple sql statements that perform CRUD operations. Querying for Date String sql = "SELECT create_date FROM customer WHERE customer_id = ?"; int storeId = jdbcTemplate.queryForObject(sql, java.util.Date.class, custom...

spring • JdbcTemplate

Basic cpu and memory profiling

Add the following code in you main program. var cpuprofile = flag.String("cpuprofile", "", "write cpu profile `file`") var memprofile = flag.String("memprofile", "", "write memory profile to `file`") func main() { flag.Parse() ...

Go • Profiling using go tool pprof

Basic memory Profiling

var memprofile = flag.String("memprofile", "", "write memory profile to `file`") func main() { flag.Parse() if *memprofile != "" { f, err := os.Create(*memprofile) if err != nil { log.Fatal("could not create mem...

Go • Profiling using go tool pprof

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

Doing "Update-Database" within your code

Applications running in non-development environments often require database updates. After using the Add-Migration command to create your database patches there's the need to run the updates on other environments, and then the test environment as well. Challenges commonly faced are: no Visual S...

Entity Framework • Entity-framework Code First Migrations

range-based for loop

std::vector<int> primes = {2, 3, 5, 7, 11, 13}; for(auto prime : primes) { std::cout << prime << std::endl; }

C++ • Iteration

Drop tables from database

DROP TABLE Database.table_name

MySQL • Drop Table

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

Basic usage

std::any an_object{ std::string("hello world") }; if (an_object.has_value()) { std::cout << std::any_cast<std::string>(an_object) << '\n'; } try { std::any_cast<int>(an_object); } catch(std::bad_any_cast&) { std::cout << "Wrong type...

C++ • std::any

The Basics (Tables and Inline CSS)

Tables for Layout The structure of an HTML email file is similar to that of a web page: <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Hello!</title> </head> <body> &...

email • Getting started with email

basic R color functions

Function colors() lists all the color names that are recognized by R. There is a nice PDF where one can actually see those colors. colorRampPalette creates a function that interpolate a set of given colors to create new color palettes. This output function takes n (number) as input and produces a...

R Language • Color schemes for graphics

Understanding firebase JSON database

Before we get our hands dirty with code, I feel it is necessary to understand how data is stored in firebase. Unlike relational databases, firebase stores data in JSON format. Think of each row in a relational database as a JSON object (which is basically unordered key-value pair). So the column nam...

Android • Firebase Realtime DataBase

Retrieving data from firebase

I am gonna assume you already know about adding gradle dependencies firebase in android studio. If you don't just follow the guide from here. Add your app in firebase console, gradle sync android studio after adding dependencies. All dependencies are not needed just firebase database and firebase au...

Android • Firebase Realtime DataBase

Install Bash under Windows 10

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 ...

windows-10 • Installing Bash on Windows 10

Basic example

You can configure Mail by just adding/changing these lines in the app's .ENV file with your email provider login details, for example for using it with gmail you can use: MAIL_DRIVER=smtp MAIL_HOST=smtp.gmail.com MAIL_PORT=587 [email protected] MAIL_PASSWORD=yourPassword MAIL_E...

Laravel • Mail

Basic LocalDates

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...

jodatime • LocalDate (dealing with dates)