Homework: Revenge of the Reps!

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Learning Objectives... or rather... REPS!!!!

• ...REPS with creating methods
• ...REPS with iteration
• ...REPS with methods on numbers, strings, arrays

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Round 1

Write a method lengths that accepts a single parameter as an argument, namely an array of strings. The method should return an array of numbers. Each number in the array should be the length of the corresponding string.

words = ["hello", "what", "is", "up", "dude"]
lengths(words)  # => [5, 4, 2, 2, 4]

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Round 2

Write a Ruby method called transmogrifier This method should accept three arguments, which you can assume will be numbers. Your method should return the "transmogrified" result

The transmogrified result of three numbers is the product (numbers multiplied together) of the first two numbers, raised to the power (exponentially) of the third number.

For example, the transmogrified result of 5, 3, and 2 is (5 times 3) to the power of 2 is 225.

Use your method to find the following answers.

transmogrifier(5, 4, 3)
transmogrifier(13, 12, 5)
transmogrifier(42, 13, 7)

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Round 3

Write a method called toonify that takes two parameters, accent and sentence.

• If accent is the string "daffy", return a modified version of sentence with all "s" replaced with "th".
• If the accent is "elmer", replace all "r" with "w".
• Feel free to add your own accents as well!
• If the accent is not recognized, just return the sentence as-is.

toonify("daffy", "so you smell like sausage")
#=> "tho you thmell like thauthage"

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Round 4

Write a method word_reverse that accepts a single argument, a string. The method should return a string with the order of the words reversed. Don't worry about punctuation.

word_reverse("Now I know what a TV dinner feels like")
# => "like feels dinner TV a what know I Now"

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Round 5

Write a method letter_reverse that accepts a single argument, a string. The method should maintain the order of words in the string but reverse the letters in each word. Don't worry about punctuation. This will be very similar to round 4 except you won't need to split them with a space.

letter_reverse("Now I know what a TV dinner feels like")
# => "woN I wonk tahw a VT rennid sleef ekil"
letter_reverse("Put Hans back on the line")
# => "tuP snaH kcab no eht enil"

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Round 6

Write a method longest that accepts a single argument, an array of strings. The method should return the longest word in the array. In case of a tie, the method should return either.

longest(["oh", "good", "grief"]) # => "grief"
longest(["Nothing" , "takes", "the", "taste", "out", "of", "peanut", "butter", "quite", "like", "unrequited", "love"])
# => "unrequited"