gustavofranke

def rev[A](str: List[A]): List[A] = str match {
  case Nil => Nil
  case x :: Nil => x :: Nil
  case x :: y :: Nil => y :: x :: Nil
  case x :: xs => xs.last +: rev(xs.init) :+ x
}

val gus = "Gustavo".toList //gus: List[Char] = List(G, u, s, t, a, v, o)
rev(gus) //res0: List[Char] = List(o, v, a, t, s, u, G)

gustavofranke

trait Bird {
  val name: String
}

trait Flying {
  def flyMessage: String
  def fly() = println(flyMessage)
}

trait Swimming {

gustavofranke

import scala.util.Try

val a = Try(5 / 0)
a.isSuccess
a.isFailure
a.toOption
a.failed
a.orElse(Try(1))
a.recoverWith { case _ ⇒ Try(1) }
a.getOrElse("boom")

gustavofranke

val z: Int => Int = _ + 1
val y = z(3)
val x = z

val sum: (Int, Int) => Int = _ + _
val sumCurried: Int => Int => Int = sum.curried
sum(1,2)
sumCurried(1)(2)

val w = sumCurried(1)

gustavofranke

import org.junit.Test;
import static org.junit.Assert.*;

public class MyTest {
    @Test
    public void shouldReturnASDF() {
        assertEquals("asdf", MySingleton.INSTANCE.asdf());
    }

    @Test

gustavofranke

• Ctrl + a – go to the start of the command line
• Ctrl + e – go to the end of the command line
• Ctrl + k – delete from cursor to the end of the command line
• Ctrl + u – delete from cursor to the start of the command line
• Ctrl + w – delete from cursor to start of word (i.e. delete backwards one word)
• Ctrl + y – paste word or text that was cut using one of the deletion shortcuts (such as the one above) after the cursor
• Ctrl + xx – move between start of command line and current cursor position (and back again)
• Alt + b – move backward one word (or go to start of word the cursor is currently on)
• Alt + f – move forward one word (or go to end of word the cursor is currently on)
• Alt + d – delete to end of word starting at cursor (whole word if cursor is at the beginning of word)

gustavofranke

GREP

Filter by file extension: grep -r --include \*.java <the-expression> .

Recursive Find and Replace

find ./ -type f -readable -writable -exec sed -i 's/this/by that/g' {} ;

gustavofranke

I just had to set up Jenkins to use GitHub. My notes (to myself, mostly):

Detailed Instructions

For setting up Jenkins to build GitHub projects. This assumes some ability to manage Jenkins, use the command line, set up a utility LDAP account, etc. Please share or improve this Gist as needed.

Install Jenkins Plugins

• get both the git and github plugin
• http://wiki.jenkins-ci.org/display/JENKINS/Git+Plugin

gustavofranke

• list local configs: git config --list
• create a branch: git branch testing, testing is the branch name
• point to a branch: git checkout testing git checkout master
• create and point to a branch: git checkout -b testing
• list of current branches: git branch
• merge: git checkout master ; git merge testing
• delete a branch: git branch -d testing
• to point a local copy to a different url: git remote set-url origin
• to revert all changes to be just like remote repository head: git fetch origin && git reset --hard origin/master