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Quiz 3

Overview

• This quiz has 5 sections.
  1. fundamentals
     • VowelUtils
     • StringUtils
     • PigLatinGenerator - Difficult
  2. arrays
     • SquareArrayAnalyzer
     • TicTacToe
     • WaveGenerator - Difficult
  3. object orientation
     • LabStatus
     • RockPaperScissors
  4. collections
     • Lab
     • Student
  5. generics
     • ArrayUtility - Difficult

Section 1 - Fundamentals

VowelUtils

• Description
  • The purpose of this class is to create utility methods to be used to assist in the completion of PigLatinGenerator.
• Methods to Complete
  • Boolean hasVowels(String word)
    • return true if word contains a, e, i, o, or u.
  • Boolean isVowel(Character character)
    • return true if character is a, e, i, o, or u
  • Integer getIndexOfFirstVowel(String word)
    • return the index of the first vowel occurring in word
  • Boolean startsWithVowel(String word)
    • return true if first character of word is a vowel

StringUtils

• Description
  • The purpose of this class is to create utility methods to be used to assist in the completion of WaveGenerator.
• Methods to Complete
  • String capitalizeNthCharacter(String str, Integer indexToCapitalize)
    • return str with the character at indexToCapitalize capitalized
  • Boolean isCharacterAtIndex(String baseString, Character characterToCheckFor, Integer indexOfString)
    • return true if baseString has characterToChexFor at index of indexOfString.
  • String[] getAllSubStrings(String string)
    • return the powerset of characters of string
  • Integer getNumberOfSubStrings(String input)
    • return the number of all substrings in input

PigLatinGenerator

• Description
  • Pig Latin is an English language game where the goal is to hide the meaning of a word from people not aware of the rules.
  • Given a String representative of a word, the rules are as follows:
    • If the word starts with a vowel, then return the original string with "way" appended.
    • If the word starts with a consonant, then shift consonants from the beginning of the word to the end of the word until the first vowel. Then, return the newly shifted string with "ay" appended.
    • If the word has no vowels, then return the original string plus "ay".
    • Vowels are any of the following letters: a, e, i, o, u.
    • Consonants are any letter, which aren't a vowel.

Example

• Sample Program

public static void main(String[] args) {
	PigLatinGenerator p = new PigLatinGenerator();
	System.out.println(p.translate("Map"));
	System.out.println(p.translate("Apple"));
	System.out.println(p.translate("Map Apple"));
	System.out.println(p.translate("Psych"));
}

• Output

apMay
Appleway
apMay Appleway
Psychay

Section 2 - Arrays

Square Array Checker

• Given two arrays a and b write a method compare(a, b) that returns true if the two arrays have the "same" elements, with the same multiplicities. "Same" means, here, that the elements in b are the elements in a squared, regardless of the order.

Example 1 - Valid Array

a = [121, 144, 19, 161, 19, 144, 19, 11]  
b = [121, 14641, 20736, 361, 25921, 361, 20736, 361]

• compare(a, b) returns true because in b
  • 121 is the square of 11,
  • 14641 is the square of 121,
  • 20736 the square of 144,
  • 361 the square of 19,
  • 25921 the square of 161, and so on.

Example 2 - Invalid Array

a = [121, 144, 19, 161, 19, 144, 19, 11]  
b = [132, 14641, 20736, 361, 25921, 361, 20736, 361]

compare(a,b) returns false because in b 132 is not the square of any number of a.

Example 3 - Invalid Array

a = [121, 144, 19, 161, 19, 144, 19, 11]  
b = [121, 14641, 20736, 36100, 25921, 361, 20736, 361]

compare(a,b) returns false because in b 36100 is not the square of any number of a.

TicTacToe

• Description
  • The purpose of this class is to create a model of a TicTacToe board.
  • To be homogenous means to be of a single type or value.
• Methods to Complete
  • String[] getRow(Integer rowInde)
    • returns the array representative of the respective row index
  • String[] getColumn(Integer columnIndex)
    • returns the array representative of the respective column index
  • Boolean isRowHomogenous(Integer rowIndex)
    • returns true if the respective row contains 1 unique value.
  • Boolean isColumnHomogeneous(Integer columnIndex)
    • returns true if the respective row contains 1 unique value.
  • String getWinner()
    • return the String value of a homogenous row, column, or diagnol
  • String[][] getBoard()
    • return the array representation of this TicTacToe board

WaveGenerator

• Description
  • The purpose of this class is to create an array of near-identical String, whose array index corresponds to the index of the only capitalized character in the String
• Methods to Complete
  • String[] wave(String str)

Section 3 - Object Orientation

RockPaperScissorsEvaluator

• Description
  • Rock paper scissors is a hand game which allows a player to select 1 of 3 states: ROCK, PAPER, or SCISSORS.
  • A player who select ROCK will defeat a player who selects SCISSORS
  • A player who selects PAPER will defeat a player who select ROCK
  • A player who selects SCISSORS will defeat a player who selects PAPER

ROCK

• Sample Script

  // : Given
  RockPaperScissorHandSign rock = RockPaperScissorHandSign.ROCK;
  
  // : When
  RockPaperScissorHandSign winner = rock.getWinner();
  RockPaperScissorHandSign loser = rock.getLoser();
  
  // : Then
  System.out.println(winner);
  System.out.println(loser);
  

• Sample Output

  PAPER
  SCISSORS
  

PAPER

• Sample Script

  // : Given
  RockPaperScissorHandSign paper = RockPaperScissorHandSign.PAPER;
  
  // : When
  RockPaperScissorHandSign winner = paper.getWinner();
  RockPaperScissorHandSign loser = paper.getLoser();
  
  // : Then
  System.out.println(winner);
  System.out.println(loser);
  

• Sample Output

  SCISSORS
  ROCK
  

SCISSORS

• Sample Script

  // : Given
  RockPaperScissorHandSign scissors = RockPaperScissorHandSign.SCISSORS;
  
  // : When
  RockPaperScissorHandSign winner = scissors.getWinner();
  RockPaperScissorHandSign loser = scissors.getLoser();
  
  // : Then
  System.out.println(winner);
  System.out.println(loser);
  

• Sample Output

  ROCK
  PAPER
  

Section 4 - Collections

Lab

• Description
  • The purpose of this class is to encapsulate a name and LabStatus for a particular instance of a Lab
• Methods to Complete
  • String getName()
  • LabStatus getStatus()
  • void setStatus(LabStatus status)

Student

• Description
  • The purpose of this class is to encapsulate and manage a composite List of Lab objects.
• Methods to Complete
  • Lab getLab(String labName)
  • void setLabStatus(String labName, LabStatus status)
  • void forkLab(Lab lab)
  • LabStatus getLabStatus(String labName)

LabStatus

• Description
  • The purpose of this class is create enumerations representative of different states of a Lab for a particular Student.
• Enumerations to be created
  • COMPELTED, INCOMPLETE, PENDING

Section 5 - Generics

ArrayUtility

• Description
  • The purpose of this class is to create a utility for handling generic array operations.
• Methods to Complete
  • SomeType findOddOccurringValue()
  • SomeType findEvenOccurringValue()
  • Integer getNumberOfOccurrences(SomeType valueToEvaluate)
  • SomeType[] filter(Function<SomeType, Boolean> predicate)