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| Module: | Prelude |
|---|---|
| Function: | filter |
| Type: | (a -> Bool) -> [a] -> [a] |
| Description: | returns a list constructed from members of a list (the second argument) fulfilling a condition given by the first argument |
| Related: | |
| Keywords: | list construction |
Input: filter (>5) [1,2,3,4,5,6,7,8]
Output: [6,7,8]
Input: filter odd [3,6,7,9,12,14]
Output: [3,7,9]
Input: filter (\x -> length x > 4) ["aaaa","bbbbbbbbbbbbb","cc"]
Output: ["bbbbbbbbbbbbb"]