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    ## Welcome!

kostasx

Git Submodules basic explanation

Why submodules?

In Git you can add a submodule to a repository. This is basically a repository embedded in your main repository. This can be very useful. A couple of usecases of submodules:

• Separate big codebases into multiple repositories.

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Assorted collection of engineering articles / blogs

that I bookmarked but never had enough time to read

• The Agile Manifesto
• React Philosophies - 🧘 Things I think about when I write React code 🧘
• The Product-Minded Software Engineer
• Architecture, Performance, and Games - Game Programming Patterns / Introduction
• Responsible Tech Playbook
• Small, Sharp Tools
• Why the developers who use Rust love it so much
• Testing - 8th Light Blog

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Linux and Bash

Lets talk about Linux and Bash.

Notes

Notes were taken from edx.org of LFS101x Introduction to Linux.

Date: Sun Sep 28 00:30:48 EDT 2014

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How to remove node_modules

Create a .gitignore file

1. Check for an existing .gitignore file in the project directory

ls -a

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function mapValues(obj, fn) {
  return Object.keys(obj).reduce((result, key) => {
    result[key] = fn(obj[key], key);
    return result;
  }, {});
}

function pick(obj, fn) {
  return Object.keys(obj).reduce((result, key) => {
    if (fn(obj[key])) {

kostasx

const store = createStore((state = { counter: 0 }, action) => {
  switch(action.type) {
    case "INCREMENT":
      return { counter: state.counter + 1 }
    case "DECREMENT":
      return { counter: state.counter - 1 }
    default:
      return state
  }
})

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[
	{ "country": "Austria", "code": "AT" },
	{ "country": "Belgium", "code": "BE" },
	{ "country": "Bulgaria", "code": "BG" },
	{ "country": "Croatia", "code": "HR" },
	{ "country": "Cyprus", "code": "CY" },
	{ "country": "Czech Republic", "code": "CZ" },
	{ "country": "Denmark", "code": "DK" },
	{ "country": "Estonia", "code": "EE" },
	{ "country": "Finland", "code": "FI" },

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Afghanistan
Albania
Algeria
Andorra
Angola
Antigua and Barbuda
Argentina
Armenia
Australia
Austria

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pragma solidity ^0.4.19;
contract ERC721 {
   string constant private tokenName = "My ERC721 Token";
   string constant private tokenSymbol = "MET";
   uint256 constant private totalTokens = 1000000;
   mapping(address => uint) private balances;
   mapping(uint256 => address) private tokenOwners;
   mapping(uint256 => bool) private tokenExists;
   mapping(address => mapping (address => uint256)) private allowed;
   mapping(address => mapping(uint256 => uint256)) private ownerTokens;