105 lines
1.1 KiB
Markdown
105 lines
1.1 KiB
Markdown
List
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====
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#### Slicing
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```haskell
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head :: Foldable f => f a -> Maybe a
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```
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```haskell
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tailMay :: [a] -> Maybe [a]
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```
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```haskell
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tailSafe :: [a] -> [a]
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```
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```haskell
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initMay :: [a] -> Maybe [a]
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```
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```haskell
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initSafe :: [a] -> [a]
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```
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```haskell
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initDef :: [a] -> [a] -> [a]
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```
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```haskell
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lastMay :: [a] -> Maybe a
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```
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```haskell
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lastDef :: a -> [a] -> a
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```
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```haskell
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list :: [b] -> (a -> b) -> [a] -> [b]
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```
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```haskell
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drop :: Int -> [a] -> [a]
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```
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```haskell
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take :: Int -> [a] -> [a]
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```
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#### Unpacking
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```haskell
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uncons :: [a] -> Maybe (a, [a])
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```
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```haskell
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unsnoc :: [x] -> Maybe ([x],x)
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```
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#### Sorting
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```haskell
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sortOn :: Ord o => (a -> o) -> [a] -> [a]
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```
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#### Removing
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```haskell
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ordNub :: Ord a => [a] -> [a]
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```
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#### Splitting
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```haskell
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splitAt :: Int -> [a] -> ([a], [a])
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```
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```haskell
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splitAt :: Int -> [a] -> ([a], [a])
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```
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```haskell
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intercalate :: [a] -> [[a]] -> [a]
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```
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#### Comparison
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```haskell
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isPrefixOf :: Eq a => [a] -> [a] -> Bool
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```
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#### Filter
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```haskell
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filter :: (a -> Bool) -> [a] -> [a]
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```
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```haskell
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replicate :: Int -> a -> [a]
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```
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```haskell
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map :: Functor f => (a -> b) -> f a -> f b
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```
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