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Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

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General rules

1. Follow standard conventions.
2. Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
3. Boy scout rule. Leave the campground cleaner than you found it.
4. Always find root cause. Always look for the root cause of a problem.

Design rules

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import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

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// Enable component-scanning and auto-configuration with @SpringBootApplication Annotation
// It combines @Configuration + @ComponentScan + @EnableAutoConfiguration
@SpringBootApplication
public class FooApplication {
  public static void main(String[] args) {
    // Bootstrap the application
    SpringApplication.run(FooApplication.class, args);
  }
}

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The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

• Stores data elements based on an sequential, most commonly 0 based, index.
• Based on tuples from set theory.

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• nylas/N1 💌 An extensible desktop mail app built on the modern web.
• black-screen/black-screen A terminal emulator for the 21st century.
• shockone/black-screen A terminal emulator for the 21st century.
• ptmt/react-native-macos React Native for macOS
• docker/kitematic Visual Docker Container Management on Mac & Windows
• kitematic/kitematic Visual Docker Container Management on Mac & Windows
• davezuko/wirk-starter Get started with React, Redux, and React-Router!
• TelescopeJS/Telescope 🔭 An open-source social news app built with Meteor & React
• coryhouse/react-slingshot React + Redux starter kit / boile

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The Ultimate Unit Testing Cheat-sheet

For Mocha, Chai and Sinon

using mocha/chai/sinon for node.js unit-tests? check out my utility: mocha-stirrer to easily reuse test components and mock require dependencies

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• Sinon Chai
• Chai
• Sinon
• Mocha

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function parseAdvertisingData(buffer) {
    var length, type, data, i = 0, advertisementData = {};
    var bytes = new Uint8Array(buffer);

    while (length !== 0) {

        length = bytes[i] & 0xFF;
        i++;

        // decode type constants from https://www.bluetooth.org/en-us/specification/assigned-numbers/generic-access-profile

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#Just follow this guide and install needed packages https://www.npmjs.com/package/karma-fixture

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# encoding: utf-8

import rdflib

book            = rdflib.URIRef(u'urn:isbn:978-3-16-148410-0')
bookType        = rdflib.URIRef(u'urn:publishing:schema:book')
authorPredicate = rdflib.URIRef(u'http://purl.org/dc/terms/creator')
joyce           = rdflib.URIRef(u'urn:foaf:registered-people:joyce')
kelly           = rdflib.URIRef(u'http://twitter.org/nutjob4life')
mattmann        = rdflib.URIRef(u'http://people.apache.org/mattmann')