Extend section

Kikobeats · Jan 3, 2017 · 2933712 · 2933712
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commit 2933712
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diff --git a/array/preallocation.md b/array/preallocation.md
@@ -21,3 +21,5 @@ arr[0] = 1
 arr[1] = 2
 arr[2] = 3
 ```
+
+That useful when you want to use an `Array` as temporal data buffer. [array-list](https://www.npmjs.com/package/array-list) is a good library for that.