Haskell Type Annotations

Question 1

takeWhile and dropWhile

Answer 1

(a -> Bool) -> [a] -> [a]

Question 2

Ord

Answer 2

Gives order
1 < 2 for example.

Question 3

Show

Answer 3

Print, essentially.

Question 4

Eq

Answer 4

Equal:
1 == 1 for example.

Question 5

Read

Answer 5

Allows something to be read as a Int, or [char] for example.
Allows types tp be changed.

Question 6

.

Answer 6

(b -> c) -> (a -> b) -> a -> c

Question 7

Foldable

Answer 7

Used for fold, etc.

Question 8

Foldl1 / Foldr1

Answer 8

Foldable t => (a -> a -> a) -> t a -> a

Question 9

Foldl / Foldr

Answer 9

Left = Foldable t => (b -> a -> b) -> b -> t a -> b
Right = Foldable t => (a -> b -> b) -> b -> t a -> b

B is the accumulator

Question 10

zipWith

Answer 10

(a -> b -> c) -> [a] -> [b] -> [c]

Question 11

zip

Answer 11

[a] -> [b] -> [(a, b)]

Question 12

Fractional

Question 13

Integral

Question 14

Num