LifesABeach210/midterm

Midterm

• Please include the correct number of parameters in each function!
• Make sure every function returns something
• You can console.log() the functions with test input to test your functions in the space provided
• Read each question carefully
• Good luck!

Methods you might need

• .toLowerCase()

• .toUpperCase()

• .concat()

• .indexOf()

• .push()

• .unshift()

• You may NEED some of these at certain points, but definitely not all of them.

• You can use anything else we've formally covered.

• If we have not covered it, please ask to be sure that it's okay.

Setup

• Fork
• Clone

Tasks

• sumOfOdds

• Write a function called sumOfOdds that takes in 2 numbers as parameters and sums the odd numbers between them.

• This function is inclusive so please include your two parameters in your calculation.

• After summing the numbers, return the sum.

• You can assume that the 2nd number passed in will always be greater than the first and that the two numbers will not be the same

• Note: This problem should account for negative number input

• arraySubtract

  • Write a function arraySubtract that takes in 2 arrays of numbers and subtracts the item in each index at array 1 with its respective item in each index at array 2.
  • The result of each calculation should be placed in a new array and that array should be returned when the calculations are complete.
  • For exmaple arraySubtract([7,9],[2,6]) should return [5,3] You can assume the arrays that are being input are of the same length

• surroundArray

  • Write a function that takes in 3 parameters in this order: 1 array, 1 string, and then another string.
  • Add the first string to the beginning of the array
  • Add the second string to the end of the array
  • Return the modified array

• longestString

  • Write a function longestString that takes in an array of strings as a parameter and returns the longest string in the array.
  • If there is nothing in the array, return an empty string ('')
  • You can assume that no two strings will have the same length in the array

• sToR

  • Write a function sToR that replaces every 's' character in the string with an 'r' AND every 'r' character in the string with an 's'
  • If the letter in the original string is uppercase the letter in the output string should be as well
  • Do NOT use replaceAll or similar string methods. If you are unsure what that means, ask before you use a string method! (toUpperCase() and toLowerCase() should be all you need if anything)

• divisibleBy4And7

  • Write a function divisibleBy4And7 that takes in a number and returns true if it is divisble by both 4 and 7.
  • If it is not, return false.

• exclamationAndQuestion

  • Write a function exclamationAndQuestion that takes in a string
  • Return true if the string contains both an exclamation point (!) AND a question mark (?)
  • Return false if otherwise

• countAB

  • Write a function called countAB that takes in a single string and returns an array of length two. The first item in the array should be the count of every A character in the array. The 2nd item should be the count of every B character in the array.
  • No need to add the count of A and B together. Again, we want an array with the separate counts of each
  • Your function should account for both cases (upper and lower) of each letter.

• addStringIfLastS

  • Write a function called addStringIfLastS() that takes in two parameters. First, an array of strings and second a single string.
  • Go through each string in the array. If the string ends in the letter 's' (either case), append your string input to that string in the array.
  • Finally, return your modified array.
  • Example: addStringIfLastS(['test', 'testing', 'testings'], 'TEST') => ['test', 'testing', 'testingsTEST']

• twoSmallest

  • Write a function called twoSmallest that takes in a single array of numbers as a parameter and returns the smallest two numbers in the following array format where the smallest number always comes before the 2nd smallest number (ie, the bigger number should come second):
  • [smallestNumber, secondSmallestNumber]
  • If the array is shorter than length 2, return undefined to the user
  • You can assume that every number in the array will be unique