Mehmet Sait Gülmez saitgulmez

1. Initialization

Declaring an empty vector and then pushing values

// creates an empty vector
std::vector<int> vec;
// push values into vector
vec.push_back(10);
vec.push_back(20);
vec.push_back(30);

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.

General rules

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

	# Install wll_paginate (https://github.com/mislav/will_paginate)
	bundle add will_paginate

	# controllers/users_controller.rb
	class UsersController < ApplicationController
	def index
	@users = User.paginate(page: params[:page], per_page: 3)
	end
	end

	var blake = require('blakejs')

	const main = async () => {
	const hex_value = "0a0b";
	console.log(hex_value)
	// Output: 0a0b

	const buffer = Buffer.from(hex_value, 'hex')
	console.log(buffer)
	// Output: <Buffer 0a 0b>

	OK, Let's begin. Hello, Everybody.
	My name is Narihiro Nakamura.
	Today, I'm talking about "Parallel worlds of CRuby's GC".

	I'm very happy now, because I'm meeting attendee in rubyconf.
	And, one of my dreams is to talk in rubyconf.
	So, I'm very happy and exciting.

	Today is my first presentation in English.
	My English is not good.

	require 'casper_network'
	# We'll use this to connect to the Casper Network.
	client = Casper::CasperClient.new('YOUR_CASPER_NETWORK_NODE_IP_ADDRESS')

	# A block hash is a Digest over the contents of the block Header.
	block_hash = "53943d39b0ea69dbdd3e255cfafbe0a3d610ccd0e83d86c83ee6d2f623b92e84"

	block = client.chain_get_block(block_hash)

	# How to access and print the Era ID in which this block was created.

	require 'casper_network'
	# Following IP addres is taken from https://testnet.cspr.live/tools/peers
	YOUR_CASPER_NETWORK_NODE_IP_ADDRESS = "65.108.73.113"
	# We'll use this to connect to the Casper Network.
	client = Casper::CasperClient.new(YOUR_CASPER_NETWORK_NODE_IP_ADDRESS)
	block_hash = "53943d39b0ea69dbdd3e255cfafbe0a3d610ccd0e83d86c83ee6d2f623b92e84"
	block = client.chain_get_block(block_hash)

	# A Block object
	puts block

	require 'casper_network'
	# Following IP addres is taken https://testnet.cspr.live/tools/peers
	node_ip_address = "65.21.235.219"
	client = Casper::CasperClient.new(node_ip_address)
	block = client.get_block_by_height(1271722)

	# A Block object
	puts block

	# To retrieve BlockHeader object

	var blake = require('blakejs')
	const main = async () => {
	const input = "abc"
	console.log(Buffer.from(input, 'hex'))

	const array = Uint8Array.from(Buffer.from(input, 'hex'));
	console.log("array is ",array)
	// Output : Uint8Array(1) [171]

	const byte_array = blake.blake2b(array, null, 32);

	require 'blake2b'
	input = "020e0000006361737065722d6578616d706c65130000006578616d706c652d656e7472792d706f696e7401000000080000007175616e7469747904000000e803000001050100000006000000616d6f756e7404000000e803000001"

	key = Blake2b::Key.none
	hex = Blake2b.hex(input, key, 32) # It does not give the same result that we got from js

	body_uint8_array = [input].pack("H").unpack("C").inspect
	body_hash_array = Blake2b.bytes(body_uint8_array, key, 32)

	puts body_hash_array.pack("C").unpack("H").first

Mehmet Sait Gülmez saitgulmez

1. Initialization

General rules

Design rules