vonbarown/arrays_assignment

Arrays Lab

To complete this lab (as for most labs), do the following:

1. Fork this repo.
2. Clone your forked repo.
3. Create a file called arrays_lab.js inside your cloned repo.
4. Copy the description of the exercise as a comment.
5. Underneath the commented description write your code.
6. Ensure your solutions work properly!
7. Open PR against this repo.

---

Exercises

1. Log the last element of an array.

2. Change the first element of an array to the string "something else".

3. Add "mango" to the end of a fruits array ["strawberry", "banana"].

4. Add "blueberry" to the front of the same fruits array.

5. Remove the last element of the fruits array.

6. console.log the length of the fruits array.

7. Remove the first element of the fruits array.

8. Join all the elements in the fruits array with a '$'.

9. Given two arrays, write code that logs the larger array. If the arrays are the same length, log "They are the same size"

let firstArr = [1,2,3]
let secondArr = [1,5,2,4]

// log [1,5,2,4]

10. Given an array, log its middle element. If the middle of the array is between two elements, log both of them.

let hasExactMiddleArr = [1,5,3]

// log 5

let hasNoExactMiddleArr = [1,4,6,9]

// log 4,6

11. Write code that logs every value in an array using a for loop

let logMeOutFor = ["I", "am", "a", "happy", "array"]

/* I
  am
  a
  happy
  array
*/

12. Write code that logs every value in an array using a while loop

let logMeOutWhile = ["I", "am", "a", "happy", "array"]

/* I
  am
  a
  happy
  array
*/

13. Write code that logs every value in an array using a for/of loop

let logMeOutForOf = ["I", "am", "a", "happy", "array"]

/* I
  am
  a
  happy
  array
*/

14. Given an array of numbers, write code that logs the sum of all the numbers

let firstArrToSum = [1, 2, 3, 4, 5, 6]
//  21

let secondArrToSum = [1, 2, 3, 4, 5, -6]
//  9

15. Given an array of numbers, write code that logs all the odd numbers

let evenAndOddArr = [1,5,2,4,11,12,99,100]

// 1, 5, 11, 99

16. Given an array of numbers, write code that logs the sum of all the even numbers

let evenAndOddArrToSum = [1,5,2,3,11,4,6]

// 12

17. Write code such that noDupeList has all the same numbers as dupeFriendlyList, but has no more than one of each number.

let dupeFriendlyList = [4,2,6,2,2,6,4,9,2,1]
let noDupeList = []

// noDupleList = [4, 2, 6, 9, 1]

18. Make an array that contains all elements that appear exactly once in someRepeatsAgain

let someRepeatsAgain = [25,11,30,31,50,28,4,37,13,20,24,38,28,14,44,33,7,43,39,35,36,42,1,40,7,14,23,46,21,39,11,42,12,38,41,48,20,23,29,24,50,41,38,23,11,30,50,13,13,16,10,8,3,43,10,20,28,39,24,36,21,13,40,25,37,39,31,4,46,20,38,2,7,11,11,41,45,9,49,31,38,23,41,16,49,29,14,6,6,11,5,39,13,17,43,1,1,15,25]

// [ 44,33,35,42,12,48,30,50,8,3,10,28,24,36,21,1000,40,37,4,46,20,2,7,45,9,31,38,23,41,16,49,29,14,6,11,5,39,13,17,43,1,15,25 ]

19. Given an array of strings, find the the string with the most "a"s in it.

let mostAStrings = ["apes", "abba", "apple"]

//"abba"

20. Find the second smallest number in an Array of Ints

let secondSmallestArr = [11, 52, 10, 7, 50, 46, 79, 78, 13, 26, 83, 92, 89, 81, 1, 41, 4, 23, 57, 41, 80, 83, 41, 69]

// 4