Tag: List

Jan 26

How to make the first character uppercase of each word of a List in Scala

Sai Gowtham BadvityLeave a commentScalacapitalize, List, String, uppercase

Hey there! Welcome to ClearUrDoubt.com. In this post, we will look at a Scala program to make the first character uppercase of each word of an List. Let’s look at the program:

object CamelCaseWordMaker extends App {
  def capitalize(input: List[String]): List[String] =
    input
      .map(str => str.split(" "))
      .map(arr => arr.map(_.capitalize).mkString(" "))

  println(capitalize(List("hello", "world", "hello world")))
}

object CamelCaseWordMaker extends App {

def capitalize(input: List[String]): List[String] =

input

.map(str => str.split(" "))

.map(arr => arr.map(_.capitalize).mkString(" "))

println(capitalize(List("hello", "world", "hello world")))

}

Output: Happy learning. Please leave a reply in Read more

Dec 13

How to find the largest number in a given list of integers in Scala

Sai Gowtham BadvityLeave a commentScalaList, Max, Scala

Hey there! Welcome to ClearUrDoubt.com. In this post, we will look at a Scala program to find the largest number in a given list of integers. Let’s look at the program:

package com.clearurdoubt.practice

object FindMax extends App {
  
  def max(xs: List[Int]): Int = {
    
    @annotation.tailrec
    def max(xs: List[Int], maximum: Int) : Int = xs match {
      case Nil => throw new java.util.NoSuchElementException("Empty List")
      case x :: Nil => if(x > maximum) x else maximum
      case x :: y :: xs1 => 
        if (x >= y) 
          max(xs1, x) 
        else 
          max(xs1, y)
    }
    
    max(xs, Int.MinValue)
  }
  
  
  println("Max of List(1,-5,10,3,9) is : " + max(List(1,-5,10,3,9)))
}

package com.clearurdoubt.practice

object FindMax extends App {

def max(xs: List[Int]): Int = {

@annotation.tailrec

def max(xs: List[Int], maximum: Int) : Int = xs match {

case Nil => throw new java.util.NoSuchElementException("Empty List")

case x :: Nil => if(x > maximum) x else maximum

case x :: y :: xs1 =>

if (x >= y)

max(xs1, x)

else

max(xs1, y)

}

max(xs, Int.MinValue)

}

println("Max of List(1,-5,10,3,9) is : " + max(List(1,-5,10,3,9)))

}

Output: Happy learning. Please leave a reply in Read more

Dec 08

Removing an element from a list in Scala

Sai Gowtham BadvityLeave a commentScalaList, removing an element, Scala

Hey there! Welcome to ClearUrDoubt.com. In this post, we will look at a Scala program to remove an element from a list. We can use “take()” and “drop()” methods to achieve our objective. take(n): This method return first n elements Read more

Dec 02

How to filter positive numbers from a List of integers in Scala

Sai Gowtham BadvityLeave a commentScalafilter, List, Scala

Hey there! Welcome to ClearUrDoubt.com. In this post, we will look at a simple program to filter positive numbers from a List of integers in Scala. We can achieve this by applying filter method on the input list or using Read more

Oct 30

List and ListBuffer in Scala

Sai Gowtham BadvityLeave a commentScalaappending, List, ListBuffer, Scala

Hey there! Welcome to ClearUrDoubt.com. In this post, we will look at a program to demonstrate List and ListBuffer objects in Scala. List is an immutable collection object whereas ListBuffer is a mutable collection object. List provides a way to add Read more

Dec 15

How to remove nulls from an ArrayList in Java 8

Sai Gowtham BadvityLeave a commentJava 8ArrayList, Java 8, List, removing nulls, Stream API

Hey there! Welcome to ClearUrDoubt.com. In this post, we will look at removing nulls from an ArrayList in Java 8. Using Stream API, which was introduced in Java 8, we can remove null values from an ArrayList in a simple way. Read more

Oct 22

How to remove duplicate User Defined Objects from a List collection object

Sai Gowtham Badvity1 CommentJavaArrayList, Collection, duplicate, HashSet, Java 8, List

Hey there! Welcome to ClearUrDoubt.com. In this post, we will look at a program to remove duplicates from a List. Removing duplicate primitive and String values from List is a bit easy. We can use “Set” collection to remove the duplicates(if Read more

Aug 27

List and ArrayList demo using forEach and Comparator in Java 8

Sai Gowtham BadvityLeave a commentJavaArrayList, Comparator, forEach, Java 8, List

Hey there! Welcome to ClearUrDoubt.com. In this post, we will look at the demo of List and ArrayList using forEach and Comparator in Java 8. forEach: brand new for loop for looping through the objects in a collection using lambda expressions Comparator: Java 8 Read more

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