steinybot

/**
 * I wrote this while trying to figure out what a monad was and how you would write one. No guarantees that this is
 * actually a monad or good code at all.
 * 
 * I wanted this monad to encapsulate side effects and apply them lazily. One interesting observation that I found
 * from all the println statements was that in order for the bind (flatMap) to not evaluate the side effect was to use
 * by-name parameters. Not sure if this is really a unit function anymore...
 */
object StringOpsMonad extends App {
  println("-----")

steinybot

import scala.language.experimental.macros
import scala.reflect.macros.blackbox

/**
  * Macro bundle for case class macros.
  */
class CaseClassMacrosImpl(val c: blackbox.Context) {

  import c.universe._

steinybot

private object LoggerOutputStream {

  def info(logger: Logger, charset: Charset = StandardCharsets.UTF_8, maxMessageSize: Int = 8192): OutputStream =
    apply(logger, Level.Info, charset, maxMessageSize)

  def error(logger: Logger, charset: Charset = StandardCharsets.UTF_8, maxMessageSize: Int = 8192): OutputStream =
    apply(logger, Level.Error, charset, maxMessageSize)

  def apply(logger: Logger, level: Level.Value, charset: Charset = StandardCharsets.UTF_8, maxMessageSize: Int = 8192): OutputStream =
    new LoggerOutputStream(logger, level, charset, maxMessageSize)

steinybot

package com.example

class Test {
  // This works
  (_: Int).fooImplicit
}

steinybot

object FixingVarianceErrors {

  trait InvariantThing[T]

  trait CovariantThing[+T] {

    // Fails to compile with error:
    // Error:(12, 9) covariant type T occurs in invariant position in
    // type => FixingVarianceErrors.InvariantThing[T] of method thing1
    def thing1: InvariantThing[T]

steinybot

git log --shortstat --format="%an" | sed '/^$/d' | awk '
BEGIN { FS = ", " }
{
  if (match($1, /^ [0-9]+ files? changed/)) {
    split($2, a, " ")
    inserts = (a[1] == "")? 0 : a[1]
    split($3, b, " ")
    deletes = (b[1] == "")? 0 : b[1]
    total = (inserts - deletes)
    print name " " inserts " " deletes " " total

steinybot

case class Inner(a: String, b: Int)

case class Outer(a: String, i: Inner)

steinybot

package com.geneious.nucleus.service.util.play.json

import play.api.libs.json._
import shapeless._

trait CoproductFormats {

  implicit val cNilReads: Reads[CNil] = Reads(_ => JsError())

  implicit val cNilWrites: Writes[CNil] = Writes(_ => JsNull)

steinybot

Bob

steinybot

import com.sun.jna.Platform;
import com.sun.jna.platform.win32.Kernel32;
import com.sun.jna.platform.win32.Kernel32Util;
import com.sun.jna.platform.win32.WinNT;
import com.sun.jna.ptr.IntByReference;

class Scratch {

    public static void main(final String[] args) {
        System.out.println("Is 64-bit OS? " + is64BitOS());