ppurang

Run with Scala CLI (https://scala-cli.virtuslab.org/):

scala-cli run .

And then go to http://localhost:9991

Happy coding, Scala is great.

ppurang

val scalacOptions ++= Seq(
  "-encoding",
  "utf-8",                         // Specify character encoding used by source files.
  "-deprecation",                  // Emit warning and location for usages of deprecated APIs.
  "-explaintypes",                 // Explain type errors in more detail.
  "-feature",                      // Emit warning and location for usages of features that should be imported explicitly.
  "-language:existentials",        // Existential types (besides wildcard types) can be written and inferred
  "-language:experimental.macros", // Allow macro definition (besides implementation and application)
  "-language:higherKinds",         // Allow higher-kinded types
  "-language:implicitConversions", // Allow definition of implicit functions called views

ppurang

Dell XPS for Ubuntu 18.04

Bios:

press F12 on the Dell startup screen

• disable safe boot
• Change SATA Operation from "RAID On" to "AHCI"
• Enable Legacy Boot as well as UEFI

Install Ubuntu from USB drive

Instructions are here: https://www.ubuntu.com/download/desktop

ppurang

#CallForSpeakers pitch for #LandingFestival Berlin 2018

Considered leveraging your technical debt?

Description

How often do you hear the term MVP (minimum viable product) bandied around in startup land? It’s often a necessary evil. Technical debt, or the implied cost of the additional work caused by choosing an easy option now, rather than opting for a better solution which may take more time, is commonplace in almost every engineering team and its products. As engineers, we need to aggressively manage our technical debt, but also open our eyes to the opportunity it can provide. It’s akin to financial leverage, and has future value.

Key takeaway

I'll debunk the myths around technical debt, share how to aggressively manage it, and how to leverage it for the good of the product, the team, the company and the end user.

ppurang

0. Programming with Algebra
1. Functional Programming in Scala
2. Theorems for free
3. Propositions as Types
4. Fast and Loose Reasoning is Morally Correct
5. Typeclassopedia in Haskell
6. Categories for the Working Programmer
7. Constraints Liberate, Liberties Constrain

ppurang

// see also http://piyush.purang.net/blog/Reading_Type_Signatures_5e999531-595f-4348-b44c-e239be962885

import java.io.File
// following is the goal
type CountCharsInAFile = String => Int

type PathToFile = String => File 
def pathToFile : PathToFile = new File(_) 

type FileToLines = File => List[String]

ppurang

// the following results in 
// superduperproject : master : 0.1.0 : MD??>
// where M => Modified, D => Deleted, ?? => not tracked 
// and might include (not tested :))
// !, R, C, U  for details check https://www.kernel.org/pub/software/scm/git/docs/git-status.html#_short_format  
// if you see  superduperproject : master : 0.1.0 : -?->  ... well then oops and happy debugging and do tell... 

shellPrompt in ThisBuild := ShellPrompt.buildShellPrompt("0.1.0")

ppurang

/*                                                                              
 * Copyright (c) 2012, Lawrence Livermore National Security, LLC. Produced at   
 * the Lawrence Livermore National Laboratory. Written by Keith Stevens,        
 * kstevens@cs.ucla.edu OCEC-10-073 All rights reserved.                        
 *                                                                              
 * This file is part of the S-Space package and is covered under the terms and  
 * conditions therein.                                                          
 *                                                                              
 * The S-Space package is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as published

ppurang

import akka.actor.Actor.Receive
import akka.actor.ActorContext
import akka.actor.ActorLogging
import akka.actor.Actor
import akka.event.LoggingAdapter

object MyLoggingReceive {

  def apply(log: LoggingAdapter)(r: Receive)(implicit context: ActorContext): Receive = r match {
    case _: MyLoggingReceive ⇒ r

ppurang

//caution this is a very bad idea for a function even in javascript!

function getFileExtension(i) {
    
    // i will be a string, but it may not have a file extension.
    // return the file extension (with no period) if it has one, otherwise false
    
    var x;
    if(i.lastIndexOf(".") > -1) 
     x = i.substring(i.lastIndexOf(".")+1, i.length);