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| author | Joachim Breitner <mail@joachim-breitner.de> | 2015-03-02 10:55:22 +0100 |
|---|---|---|
| committer | Joachim Breitner <mail@joachim-breitner.de> | 2015-03-02 10:55:22 +0100 |
| commit | c5977c2e2951e9e346a8f4990d5a6bbdbf9cee0b (patch) | |
| tree | ed9693d2225cff0b6f287742befefa5c5689ff1c /libraries | |
| parent | 1def53fec6a6ef985de0e665fede4744dfd456fb (diff) | |
| download | haskell-c5977c2e2951e9e346a8f4990d5a6bbdbf9cee0b.tar.gz | |
Extend the docs for Data.List.transpose
by giving a sufficient general example to explain what happens when the
rows are not of the same lengths. Thanks to Doug McIlroy for the
suggestoin. Fixes #10128.
Diffstat (limited to 'libraries')
| -rw-r--r-- | libraries/base/Data/OldList.hs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libraries/base/Data/OldList.hs b/libraries/base/Data/OldList.hs index 137ce42150..7e79c347d4 100644 --- a/libraries/base/Data/OldList.hs +++ b/libraries/base/Data/OldList.hs @@ -468,6 +468,10 @@ intercalate xs xss = concat (intersperse xs xss) -- For example, -- -- > transpose [[1,2,3],[4,5,6]] == [[1,4],[2,5],[3,6]] +-- +-- If some of the rows are shorter than the following rows, their elements are skipped: +-- +-- > transpose [[10,11],[20],[],[30,31,32]] == [[10,20,30],[11,31],[32]] transpose :: [[a]] -> [[a]] transpose [] = [] |