• Create a directory containing an index.html file and a main.js file.
• Add the boilerplate html5 to the index.html file.
• Link the main.js file to your index.html with a script tag.
• Write the following functions in the main.js file
• Use console.log() to display the results

Write a function called sum that takes two parameters and returns the sum of those 2 numbers.

sum(5, 9); // return 14
sum(5, 4); // return 9

Note: to test this, use console.log(sum(5,9)) then open your index.html file in your browser and check the console.

Write a function named avg that takes 3 parameters and returns the average of those 3 numbers.

avg(1, 5, 9); // returns 5
avg(4, 4, 4); // returns 4
avg(10, 4, 1); // returns 5

Write a function called greaterThan that takes two parameters and returns true if the second parameter is greater than the first. Otherwise the function should return false.

greaterThan(5, 6); // returns true
greaterThan(4, 1); // returns false

Write a function called secondLargest that takes an array and returns the second largest number. Hint: this is similar to one of the problems you did yesterday.

secondLargest([1, 4, 5, 8]); // returns 5
secondLargest([8, 3, 5, 1, 9, 10]); // returns 9

Write a function called containsVowel that takes a single string and returns true if there is at least one value or false otherwise.

containsVowel('alpha'); // returns true
containsVowel('hmph'); // returns false

Write a function called piglatin that takes a single string and returns the piglatin version of that string.

Hint: look into the split() function that you can call on strings.

piglatin('good day'); // returns 'oodgay ayday'
piglatin('come now'); // returns 'omecay ownay'

Write a function called longestWord that takes a single string and returns the longest word in the string.

Hint: look into the split() function that you can call on strings.

longestWord('have you ever seen a penguin go to tea?'); // returns 'penguin'
longestWord('fool me once, shame on me. fool me twice, shame on heathcliff'); // returns 'heathcliff'

Write a function called weave that accepts an input string, str, and a number, 'n'. The function should return the string with every nth character replaced with an 'x'.

weave('hi how are you', 2) // returns 'hx xox xrx xox'
weave('im terrible, go away', 5) // returns 'im txrribxe, gx awax'

Jeb eats out at restaurants all the time but is horrible at math. He decides to write a function called tip that accepts a single parameter (the cost of the meal), and should return the tip Jeb should give his waiter. Jeb uses two rules to calculate tips:

• First he always tips 20% on the original bill.
• He then rounds up to the nearest dollar. For example, if the total with tip is $22.78, he'd round up to $23.00.

tip(57) // returns 12
tip(32) // returns 7

Write a function called multiples that accepts two numbers and returns an array of all numbers from 1 - 100 that are evenly divisible by both.

multiples(3,5) // returns [15, 30, 45, 60, 75, 90]
multiples(7,12) // returns [84]

Write a function called blackjack that accepts an array containing a hand of cards represented by the digits 2 - 9 and the values J, Q, K, and A. Return true if the hand busts (the value of the cards is > 21) or false if it hasn't busted.

According to the rules of blackjack, an ace can be worth either 1 or 11. You should make it 11 unless that causes the hand to bust, in which case it should be 1 (just like if you play in person).

blackjack(['J', 3, 4, 5, 6]) // returns 28
blackjack(['J', 'Q', 'A']) // returns 21
blackjack(['J', 3, 4, 'A']) // returns 18
blackjack(['K', 'A']) // returns 21

Write a function called divisors that accepts a number and returns an array of all of the numbers that divide evnely into it.

divisors(9) // returns [1, 3, 9]
divisors(17) // returns [1, 17]
divisors(92) // returns [1, 2, 4, 23, 46, 92]

Write a function called hamming that accepts two strings. If the lengths of the strings are not equal, the function should return false. Otherwise, return the number of letters that are in the same position in both words.

hamming('yatin','thang') // returns 0
hamming('hello','hello') // returns 5
hamming('hello','hewwo') // returns 3
hamming('hello','helloo') // returns false

Write a function called pokemon that accepts an array of numbers. Each element in the array represents a day, and the number represents the number of Pokemon caught on that day. Return an array of the same length that contains the number of total Pokemon caught up to that day.

For example,

pokemon([1, 2, 5, 1, 3]); // returns [1, 3, 8, 9, 12]

Write a function called find that accepts two parameters: the first is an array of numbers and the second is a single number. Return the index of the first time you find the second parameter in the first parameter. If the number is not in the array, return 'Not found'

find([1,2,3,4], 3) // returns 2
find([4,4,4,4], 4) // returns 0
find([1,2,2,4], 3) // returns 'Not found'

Write a function called map that accepts an array and a function as arguments. You should return an array containing the values of the array after the function has been applied to each one.

Note: there is a built-in function called map. You can't use that ;-)

map([1,2,3],function(a){return a}) // returns [1, 2, 3]
map([3,2,1],function(a){return a+2}) // returns [5, 4, 3]
map([0,2,4],function(a){return a*4}) // returns [0, 8, 16]

Write a function called filter that accepts an array and a function as arguments. You should return an array containing the values of the array that return true after the function is applied.

filter([1,2,3,4], function(a){return a%2===0}) // returns [2, 4]
filter([1,2,3,4], function(a){return a%2===1}) // returns [1, 3]

Write a function called sprint that accepts a single array of objects representing Olympic sprinters, each which has a name (string) and time (in seconds, so a number). Return the name of the athlete with the fastest time.

sprint([{'name':'jo','time':1},{'name':'job','time':2},{'name':'jon','time':3}]) // returns 'jo'

Write a function called scrabble that accepts a string and an object containing a property for each letter and a value representing the number of scrabble points its worth. Return the number of points that the whole word is worth.

Hint: strings have a split() function that might be useful.

scrabble('abc',{'a':1,'b':2,'c':3}) // returns 6
scrabble('banana',{'a':1,'b':2,'n':3}) // returns 11