Quiz 9-3

Overview

• This quiz has 2 sections.
  1. fundamentals
     • Calculator
     • StringUtils
  2. arrays
     • ArrayUtils

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Section 1 - Fundamentals

Calculator

• Description
  • The purpose of this class is to create a simple calculator.
• Methods to Complete
  • Double add(Double val1, Double val2)
    • return the sum of val1 and val2
  • Double subtract(Double val1, Double val2)
    • return the difference of val1 and val2
  • Double divide(Double val1, Double val2)
    • return the quotient of val1 and val2
  • Double squareRoute(Double value)
    • return the square root of value
  • Double square(Double value)
    • return the square of value
  • Double[] squareRoutes(Double[] values)
    • return an array of Double, containing the square root of each of the elements in values.
  • Double[] squares(Double[] values)
    • return an array of Double, containing the square of each of the elements in values.

StringUtils

• Description
  • The purpose of this class is to create utility String methods
• Methods to Complete
  • String getMiddleCharacter(String string)
    • return character at index string.length()/2 as String.
  • String capitalizeMiddleCharacter(String string)
    • return near-identical String with character at index string.length()/2 capitalized.
  • String lowercaseMiddleCharacter(String string)
    • return near-identical String with character at index string.length()/2 lowercased.
  • String invertCasing(String string)
    • return near-identical String with each character's casing inverted: Capital letters become lowercase, lowercase letters become lowercase.
  • Boolean hasDuplicateConsecutiveCharacters(String string)
    • return true if string contains two identical characters in adjacent indices.
  • Boolean removeDuplicateConsecutiveCharacters(String string)
    • return near-identical String with each occurrence of duplicate-adjacent characters removed.
  • Boolean isIsogram(String string)
    • return true if each Character in string occurs exactly 1 time.

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Section 2 - Arrays

ArrayUtils

• Description
  • The purpose of this class is to create a utility for manipulating arrays.
• Methods to Complete
  • String getMiddleElement(String[] values)
    • return the element at index values.length/2
  • String[] removeMiddleElement(String[] values)
    • return near-identical array with element at index values.length/2 removed.
  • String getLastElement(String[] values)
    • return element at index values.length-1
  • String[] removeLastElement(String[] values)
    • return near-identical array with element at index values.length-1 removed.

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