Quiz Stuff

Use a full sheet of 8½ x 11" paper. (Half sheet? Half credit!)
Put your last name and first initial in the far upper left hand corner!
No need to write out questions.
Numbering responses may help you avoid overlooking a question; it's ok to go ahead and pre-number your sheet.
Time: 3:00; two small Haskell functions plus one EC question
Can everybody see this line?

Quiz 5; February 8; Three minutes; 1+2 points

Write your own implementation of the Prelude's length function.
Write a function ftups that "flattens" a list of two-tuples into a list of individual values. Example:
```
> ftups [(1,2),(3,4),(5,6)]
[1,2,3,4,5,6]

> ftups [('t','e'),('s','t'),('e','d')]
"tested"
```

EC ½ point: What's the type of ftups?

Solutions

length [] = 0
length (_:t) = 1 + length t

ftups [] = []
ftups ((x,y):ts) = x:y:ftups ts