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Fix typo (zipWidth => zipWith) #21

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Oct 17, 2013
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Fix typo (zipWidth => zipWith) #21

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2 changes: 1 addition & 1 deletion source/_posts/07-module.txt
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Expand Up @@ -368,7 +368,7 @@ ghci> findIndices (`elem` ['A'..'Z']) "Where Are The Caps?"
[0,6,10,14]
}}

在前面，我們講過了 ``zip`` 和 ``zipWidth``，它們只能將兩個 List 組到一個二元組數或二參函數中，但若要組三個 List 該怎麼辦? 好說~ 有 ``zip3``,``zip4``,,,,和 ``zipWith3``, ``zipWidth4``...直到 7。這看起來像是個 hack，但工作良好。連着組 8 個 List 的情況很少遇到。還有個聰明辦法可以組起無限多個 List，但限於我們目前的水平，就先不談了.
在前面，我們講過了 ``zip`` 和 ``zipWith``，它們只能將兩個 List 組到一個二元組數或二參函數中，但若要組三個 List 該怎麼辦? 好說~ 有 ``zip3``,``zip4``,,,,和 ``zipWith3``, ``zipWith4``...直到 7。這看起來像是個 hack，但工作良好。連着組 8 個 List 的情況很少遇到。還有個聰明辦法可以組起無限多個 List，但限於我們目前的水平，就先不談了.

{{
ghci> zipWith3 (\x y z -> x + y + z) [1,2,3] [4,5,2,2] [2,2,3]
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