gkthiruvathukal

val wlist = List("alpha", "gamma", "beta", "epsilon")
case class DerivedData(s : String, len : Int)
val tlist = wlist map { n => DerivedData(n, n.length) }


val sortedBy1 = tlist.sortWith( (l, r) => l.s < r.s)

println("sorted by component 1")
sortedBy1 foreach println

gkthiruvathukal

import scala.util._

sealed class Abs {
  @inline def abs(x : Int) : Int = if (x < 0) -x else x
}

object gcd {

  val c = new Abs

gkthiruvathukal

import scala.util._
import math.abs

object gcd {

  def euclid(x: Int, y: Int): Int = {
    def euclidHelper(x : Int, y : Int) : Int = {
       if (x == 0) y
       else euclidHelper(y % x, x)
    }

gkthiruvathukal

quince:scala-tdd-fundamentals gkt$ sbt compile
[info] Loading project definition from /Users/gkt/Work/scala-tdd-fundamentals/project
[info] Updating {file:/Users/gkt/Work/scala-tdd-fundamentals/project/}scala-tdd-fundamentals-build...
[info] Resolving org.fusesource.jansi#jansi;1.4 ...
[info] downloading https://repo.typesafe.com/typesafe/ivy-releases/com.typesafe.sbteclipse/sbteclipse-plugin/scala_2.10/sbt_0.13/3.0.0/jars/sbteclipse-plugin.jar ...
[info] 	[SUCCESSFUL ] com.typesafe.sbteclipse#sbteclipse-plugin;3.0.0!sbteclipse-plugin.jar (1019ms)
[info] downloading https://repo.typesafe.com/typesafe/ivy-releases/com.typesafe.sbteclipse/sbteclipse-core/scala_2.10/sbt_0.13/3.0.0/jars/sbteclipse-core.jar ...
[info] 	[SUCCESSFUL ] com.typesafe.sbteclipse#sbteclipse-core;3.0.0!sbteclipse-core.jar (1757ms)
[info] downloading https://repo1.maven.org/maven2/org/scalaz/scalaz-core_2.10/7.0.2/scalaz-core_2.10-7.0.2.jar ...
[info] 	[SUCCESSFUL ] org.scalaz#scalaz-core_2.10;7.0.2!scalaz-core_2.10.jar(bundle) (4410ms)

gkthiruvathukal

import requests

r = requests.get("https://api.github.com/repos/gkthiruvathukal/st-hec/contents/hydra/dataserver.py")

r.status_code

b64data = r.json().get('content')

print(base64.b64decode(b64data))

gkthiruvathukal

create database testing;

use testing;

create table employee (id int4, name text);

gkthiruvathukal

 import java.nio.file._
 val p = FileSystems.getDefault().getPath(".", "filename.txt")
 val text = Files.readAllLines(p)
 val joined = String.join("\n", text)

gkthiruvathukal

# OS X: brew install cloc

# %H gives us the full hash (commit ID) only in a list

for commit in $(git log --pretty=format:"%H"); do
   git checkout $commit
   cloc --by-file --xml .
done

gkthiruvathukal

# Java 8
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer

# https support (kind of lame)
sudo apt-get install apt-transport-https

# SBT
echo "deb https://dl.bintray.com/sbt/debian /" | sudo tee -a /etc/apt/sources.list.d/sbt.list

gkthiruvathukal

// This takes forever and seems to use a lot more memory than expected
Array.ofDim[Double](2048, 2048, 2048)

// This seems to work faster and uses less memory.

def get1d(d1 : Int, init : Double) = Stream.continually(init) take d1 toArray
def get2d(d1 : Int, d2 : Int, init : Double) = Stream.continually( get1d(d2, init) ) take d1 toArray
def get3d(d1 : Int, d2 : Int, d3 : Int, init : Double) = Stream.continually( get2d(d2, d3, init) ) take d1 toArray

// More testing is needed.