hhimanshu

All exercises are attempted on https://coderpad.io

hhimanshu

// Dependency: elastic4s
import java.util.Calendar

import com.sksamuel.elastic4s.ElasticDsl._
import com.sksamuel.elastic4s.source.StringDocumentSource
import com.sksamuel.elastic4s.{ElasticClient, ElasticsearchClientUri}
import org.elasticsearch.action.index.IndexResponse

import scala.concurrent.ExecutionContext.Implicits.global
import scala.concurrent.Future

hhimanshu

GET _search
{
  "query": {
    "match_all": {}
  }
}

PUT /megacorp/employee/1
{
  "first_name": "John",

hhimanshu

Reference: http://fideloper.com/mac-vim-tmux

Don't forget to open a file via vim and installing bundles via :BundleInstall

hhimanshu

This gist will contain all the exercises from the book

hhimanshu

package com.learner.s99

/**
 * P06 (*) Find out whether a list is a palindrome.
 * Example:
 * scala> isPalindrome(List(1, 2, 3, 2, 1))
 * res0: Boolean = true
 */
object P06 {
  def isPalindrome[T](l:List[T]):Boolean = l == l.reverse

hhimanshu

package com.learner.s99

/**
 * P05 (*) Reverse a list.
 * Example:
 * scala> reverse(List(1, 1, 2, 3, 5, 8))
 * res0: List[Int] = List(8, 5, 3, 2, 1, 1)
 */
object P05 {
  def reverse[T](l:List[T]): Option[List[T]] = reverse(l, Nil)

hhimanshu

package com.learner.s99

/**
 * (*) Find the number of elements of a list.
 * Example:
 * scala> length(List(1, 1, 2, 3, 5, 8))
 * res0: Int = 6
 */

object P04 {

hhimanshu

package com.learner.s99

object P03 {
  def nth(n: Int, l: List[Any]): Any = {
    require(n >= 0, "n must be greater than or equal to zero")
    l match {
      case List() => None
      case head :: tail if n == 0 => head
      case head :: tail if n > 0 => nth(n - 1, tail)
    }

hhimanshu

package com.learner.s99

/**
 * (*) Find the last but one element of a list.
 * Example:
 * scala> penultimate(List(1, 1, 2, 3, 5, 8))
 * res0: Int = 5
 */
object P02 {
  def penultimate(input: List[Any]): Any = penultimate(input, None, None)