purukaushik

object AbInitio {
  def map[T,U](f : T => U, xs: List[T]): List[U] ={
    def helper(acc: List[U], xs1: List[T]):List[U] = {
      if(xs1.isEmpty) acc
      else helper(acc :+ f(xs1.head), xs1.tail)
    }
    helper(List[U](), xs)
  }
  def filter[T](f: T => Boolean, xs: List[T]):List[T] = {
    def helper(acc: List[T], xs1: List[T]): List[T] = {

purukaushik

(defn map 
  "(map f coll) takes a function f and applies it to each element in coll and returns a collection"
  ([f coll] (map f coll []))
  ([f coll acc]
   (if (empty? coll)
     acc
     (map f (rest coll) (cons (f (first coll)) acc)))))

(defn filter
  "(filter f coll) takes a function f that computes a predicate condition on each element in coll and filtered collection is returned"

purukaushik

Keybase proof

I hereby claim:

• I am purukaushik on github.
• I am purush (https://keybase.io/purush) on keybase.
• I have a public key whose fingerprint is B732 7660 14DD EBD6 D44E 0712 008E C779 98DA BE90

To claim this, I am signing this object:

purukaushik

(ns clojure-noob.prime
  (:require [clojure.string :as string])
  (:gen-class))
(defn N-stream []
  (defn from
    [n]
    (cons n (lazy-seq (from (inc n)))))
  (from 1))
(take 1000 (N-stream))

purukaushik

1. CodeTriage.com
2. OpenHub
3. Openhatch
4. UpforGrabs
5. CodeMontage

purukaushik

package io.purush.hadoop.giscup.script;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;

public class Main {
    private static int totalchars = 0, offset = 0;
    private static InputStream stream;

purukaushik

Little things that annoy developers

1. Bash completions --> start using oh my zsh
2. Don't name folders in your source code with same prefixes
3. Avoiding variables that start with Capital letters --> annoys as caps require pinky to be on shift
4. Managing small shell scripts, .`*rc files to enable quick migration from one laptop to another, working on new VMs etc

purukaushik

1. Download Hadoop and install.

2. Setup $HADOOP_HOME

3. Install openssh-server and run

   sudo /etc/init.d/ssh restart
   

   Check if ssh is running on port 22 by:

netstat -tupln | grep 22

purukaushik

Steps to setup a local docker swarm cluster with Docker Machine, swarm.

1. docker-machine create -d virtualbox local

2. eval "$(docker-machine env local)"

3. docker run swarm create

purukaushik

install findspark ( pip install -e . after cloning https://github.com/minrk/findspark, and cd findspark)

fire a notebook (jupyter notebook)

enter the following:

import findspark
import os
findspark.init()