lure

import java.util.Arrays;

public class Eratosthene{

    public static int[] byteEratosthenes(int cap) {
        int[] result = new int[(int) Math.ceil(1.25 * cap / Math.log(cap))];
        int pos = 1;
        result[0] = 2;
        byte[] primes = new byte[(cap - 2 >> 4) + 1];

lure

# Being executed in the dir with a list of files with names formed as 
# 'AuthorName BookTitle.ext' or 'AuthorName,BookTitle.ext'
# creates dirs named by Author and moves author's books there
require 'fileutils'

PATH_D = File.expand_path(File.dirname(__FILE__)) + '/' #absolute path to current dir 
FILE_BASE = File.basename(__FILE__)			#script's filename

Dir.foreach("./") do |entry|
	next if entry.start_with?('.') or entry == FILE_BASE

lure

abstract class JEnum extends Enumeration {

  case class JVal(name: String, url: Option[String]) extends Val(name) {
    lazy val successUrl: String = {
      // Should have protocol specification or YAHOO will fail
      url.getOrElse(Props.get("public.domain").getOrElse("") + "/socialauth/rest/" + this.name + "/action")
    }
  }
  protected final def JValue(name: String, url: String = null): Value = JVal(name, Option(url))
  implicit def valueToJValue(v: Value): JVal = v.asInstanceOf[JVal]

lure

#Some discussions on logging from docker: Using logstash Using Papertrail

Issue Loging Drivers

Issue Enhanced Logging

A lot of this boils down to whether you want a single or multi-process (systemd, supervisord etc.) container...

lure

Advanced Functional Programming with Scala - Notes

Copyright © 2017 Fantasyland Institute of Learning. All rights reserved.

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

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Additional resources

• http://www.scala-sbt.org/sbt-pgp/usage.html
• https://github.com/scalacenter/sbt-release-early/wiki/How-to-create-a-gpg-key

Create Account in Sonatype Issue tracker

https://issues.sonatype.org/projects/OSSRH

Create Issue with desired groupId

https://issues.sonatype.org/secure/CreateIssue.jspa?issuetype=21&pid=10134

lure

#!/bin/bash

SOURCE="$1"
if [ "${SOURCE}" == "" ]; then
    echo "Must specify a source url"
    exit 1
fi

DEST="$2"
if [ "${DEST}" == "" ]; then

lure

-- View pg_stat_activity with temporary files informations (file list and total file size)
-- version 0.3

SELECT
        pg_stat_activity.pid AS pid,
        CASE WHEN LENGTH(pg_stat_activity.datname) > 16
            THEN SUBSTRING(pg_stat_activity.datname FROM 0 FOR 6)||'...'||SUBSTRING(pg_stat_activity.datname FROM '........$')
            ELSE pg_stat_activity.datname
            END
        AS database,

lure

import cats.implicits._

//https://stackoverflow.com/questions/48744146/stacking-m-either-and-writer

object SafeLogWriter {
  type FutureErrorOr[A] = EitherT[Future, Error, A]
  type ErrorOr[A] = Either[Error, A]
  type MyWriter[A] = WriterT[Future, Vector[String], A]
  type MyStack[A] = EitherT[MyWriter, Error, A]

lure

  import scala.reflect.macros.whitebox
  import scala.language.experimental.macros


  def symbolic_impl(c: whitebox.Context)(f: c.Expr[String]): c.Expr[scala.Symbol] = {
    import c.universe._
    c.Expr(q"""scala.Symbol(${c.eval[String](f)})""")
  }
  def symbolic(f: String): scala.Symbol = macro symbolic_impl