# List of partial functions

### From HaskellWiki

## Contents |

## 1 Partial functions in Prelude

### 1.1 Functions that aren't even partial

- error
- undefined

### 1.2 List functions

- maximum
- minimum
- head
- tail
- init
- last
- foldl
- foldl'
- foldl1
- foldl1'
- foldr1
- scanl1
- scanr1
- cycle
- !!
- length
- sum
- product
- reverse
- ... (todo)

### 1.3 Other

- read
- quot
- rem
- quotRem
- div
- mod
- divMod
- succ
- pred
- toEnum
- (^)
- fail
- ... (todo)

## 2 Partial functions in other base libraries

### 2.1 Data.List

- genericIndex
- genericLength

### 2.2 Data.Map

- (!)

### 2.3 Data.Maybe

- fromJust

## 3 Partial functions in other Haskell Platform packages

... (todo)