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Sets disallow duplication, so I removed the "It's ok to use arrays as…

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1 parent 9a56862 commit 779521d41f69e108bb37fc88d59d64596e558499 @ctm ctm committed Nov 16, 2011
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@@ -760,7 +760,6 @@ in *Ruby* now, not in *Python*.
<a name="collections"/>
## Collections
-* It's ok to use arrays as sets for a small number of elements.
* Prefer `%w` to the literal array syntax when you need an array of
* Avoid the creation of huge gaps in arrays.

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