Tu Hoang rebyn

Coming from Rails background (which seems traditional and old schooled in this case), I find Javascript frameworks highly confusing. After navigating a bit around, these resources prove to be really helpful for entry learners like me. So I compiled them together in this list. Feel free to suggest more in the comments!

Love At First Sight

Getting Into Ember.js

	Came across a case today in which I had to use a few Active Support's methods. Here's how:

	$ irb
	> require 'active_support'
	> ActiveSupport::Inflector.singularize('inflections')
	> ActiveSupport::Inflector.humanize('humanize_me')

	defaults: &defaults
	adapter: postgresql
	encoding: unicode
	pool: 5
	host: localhost
	user: admin
	password: password

	development:
	<<: *defaults

	// Solving Knapsack problem using Branch and Bound - Tu Hoang - [email protected]
	// The sole question of this problem is: If you have a backpack of capacity C (weight) and you have a list of items which weigh differently (w1, w2, etc) and have different values (p1, p2, etc), which is the best combination of items to meet these requirements:
	// 1. the total weight of items doesn't exceed C,
	// 2. the total profit is the most possible maximal.
	// Simply speaking, if you are a thief and you are stealing stuff from a store, which items should you choose to carry with you in order that you gain the most?

	#include <iostream>
	#include <iomanip>
	#include <fstream>
	#define CAPACITY 16

	#!/bin/bash -e

	echo '
	PATH=$HOME/go/bin:$PATH
	export GOPATH=$HOME
	export CDPATH=.:$HOME/src/golang.org/x:$HOME/go/src:$HOME/src/github.com:$HOME/src/github.com/nf:$HOME/src/github.com/adg
	export EDITOR=vim
	' >> ~/.profile

	sudo apt-get update

	# Before
	def self.send_request_to_path(request)
	request.execute(target_base_url)
	rescue Intercom::ServiceUnavailableError => e
	if endpoints.length > 1
	retry_on_alternative_endpoint(request)
	else
	raise e
	end
	end

	<%

	require 'cgi'
	require 'uri'

	begin
	uri = URI.parse(ENV["DATABASE_URL"])
	rescue URI::InvalidURIError
	raise "Invalid DATABASE_URL"
	end

	package main

	import (
	"net/http"
	)

	type SingleHost struct {
	handler http.Handler
	allowedHost string
	}

	Latency Comparison Numbers
	--------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns
	Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms
	Read 4K randomly from SSD* 150,000 ns 0.15 ms

	$ irb
	>> require './file_to_be_used' #without .rb
	=> true