sherifkandeel

#! /usr/bin/env python

""" Convert values between RGB hex codes and xterm-256 color codes.

Nice long listing of all 256 colors and their codes. Useful for
developing console color themes, or even script output schemes.

Resources:
* http://en.wikipedia.org/wiki/8-bit_color
* http://en.wikipedia.org/wiki/ANSI_escape_code

sherifkandeel

- Abstract class vs trait
- how does traits prevent the diamond problem 
- Algebraic data types over options
- Cake pattern, why you shouldn't use it
- extends product with serializable
- case object, case class vs object, class
- value classes
- type classes
- Monads of the standard library 
  - Option

sherifkandeel

import scala.collection.concurrent
import scala.collection.immutable._


val concurrentTrieMap: concurrent.Map[String, String] = concurrent.TrieMap.empty
var immutableMap: Map[String, String] = Map.empty
var hashMap: HashMap[String, String] = HashMap.empty

def time[R](block: => R): String = {
  val t0 = System.nanoTime()

sherifkandeel

case class TestCaseClass(cost: Float, other1: Int, other2: String, other3: String)
val r = new scala.util.Random(31)
val tenkList = 1 to 10000 map (_ => TestCaseClass(r.nextFloat(), r.nextInt, r.alphanumeric.take(3).mkString, ""))
val millionList = 1 to 1000000 map (_ => TestCaseClass(r.nextFloat(), r.nextInt, r.alphanumeric.take(3).mkString, ""))
val tenMillionList = 1 to 10000000 map (_ => TestCaseClass(r.nextFloat(), r.nextInt, r.alphanumeric.take(3).mkString, ""))

def time[R](block: => R): Long = {
  val t0 = System.currentTimeMillis()
  block
  val t1 = System.currentTimeMillis()