Nicolas Kosinski nicokosi

Learn How to Learn

Notes about online course "Lean How to Learn": https://www.coursera.org/learn/learning-how-to-learn.

Goal: learn easily and get less frustrated

What is Learning?

Focused versus diffuse thinking

Week 1

lecture "Recap: Functions and Pattern Matching"

recursive function + case classes + pattern matching: example JSON printer (Scala -> JSON) pattern matching in Scala SDK: PartialFunction is a Trait with def isDefinedAt(x: A): Boolean

lecture "Recap: Collections"

Iterable (base class)
- Seq

Fake Telco

Let’s say that a ake telco needs to answer various questions such as:

contracts that are not used by any clients
etc…

Setup graph:

Docker nightclazz découverte

05/02/2015 par Mario Loriedo & Vincent Demeester

C'est une intro, prochaine session dans 1 mois

Intro

outil pour partager env de dev et env de prod (sysadmin) #devops: "build, ship and run" via conteneurs => + rapide, automatisation

	library(rjson)
	library(httr)
	library(ggplot2)
	library(scales)

	if (interactive()) {
	token <- readline(prompt="Enter Strava access token: ")
	activities <- GET("https://www.strava.com/", path = "api/v3/activities",
	query = list(access_token = token, per_page = 200))
	activities <- content(activities, "text")

	query {
	repository(owner: "softwarevidal", name: "arthur") {
	pullRequests(states: [OPEN]) {
	totalCount
	}
	}
	}


	import java.util.ArrayList;
	import java.util.List;

	import static java.lang.System.out;
	import static java.util.stream.Collectors.toList;
	import static java.util.stream.Collectors.toSet;
	import static java.util.stream.IntStream.range;

	public class WonderlandNumbers {

	import Data.List
	main = do
	putStrLn $ unwords $ map show $ filter isWonderNumber [100000..10000000]

	isWonderNumber :: Integer -> Bool
	isWonderNumber x = all (== digits x) (map digits (multiples x))

	multiples :: Integer -> [Integer]
	multiples x = map (* x) [2..6]

	import System.CPUTime

	fibo :: Int -> Int
	fibo n
	\| n <= 1 = n
	\| otherwise = fibo(n - 1) + fibo(n - 2)


	getCPUTimeDouble :: IO Double
	getCPUTimeDouble = do t <- System.CPUTime.getCPUTime; return ((fromInteger t) * 1e-12)

	# CPU & mem usage per process (sampling)
	top # list processes
	top -h # list threads
	top -c # show full command line
	htop

	# CPU usage per CPU:
	mpstat -P ALL 1

	# Processes (uptime, hierarchy, CPU usage, etc...):