Intro to Haskell

Question 1

what is qsorts type? (in Haskell and in layman’s terms)

Answer 1

qsort :: Ord a => [a] -> [a]

for any type a of ordered values, qsort maps a list of such values to another.

Question 2

what is the universal type in fp?

Answer 2

lists

Question 3

describe the tail function in fp

Answer 3

tail[1, 2, 3]

[2, 3]

Question 4

describe the !! function in fp

Answer 4

[1, 2, 3, 4] !! 2

3

Question 5

describe the take function in fp

Answer 5

take 3 [1, 2, 3, 4, 5]

[1, 2, 3]

Question 6

describe the drop function in fp

Answer 6

drop 3 [1, 2, 3, 4, 5]

[4, 5]

Question 7

describe the length function in fp

Answer 7

length [1, 2, 3, 4]

4

Question 8

describe the sum function in fp

Answer 8

sum [1, 2, 3, 4, 5]

15

Question 9

describe the product function in fp

Answer 9

product [1 .. 5]

120

Question 10

describe the ++ function in fp

Answer 10

[1, 2] ++ [3, 4]

[1, 2, 3, 4]

Question 11

describe the reverse function in fp

Answer 11

reverse[1, 2, 3]

[3, 2, 1]

Question 12

what is the highest priority in Haskell?

Answer 12

function application

Question 13

what suffic do Haskell files use?

Answer 13

.hs

Question 14

how would you write an infinite list?

Answer 14

[1 ..]

Question 15

what is the naming convention for functions and arguments?

Answer 15

they must begin with a lower case character

Question 16

what is the naming convention for lists?

Answer 16

they must end in s

Question 17

what is the naming convention for types?

Answer 17

they must begin with an upper case character.