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| Module: | Maybe |
|---|---|
| Function: | mapMaybe |
| Type: | (a -> Maybe b) -> [a] -> [b] |
| Description: | |
| Related: | fromJust, fromMaybe, maybeToList |
Input: mapMaybe (`lookup` [(1,11),(2,22),(3,33)]) [1,2,11]
Output: [11,22]
Input: mapMaybe (`lookup` [('a',"AAA"),('b',"BBB"),('c',"CCC")]) "acfg"
Output: ["AAA","CCC"]