FoundationExtension
FoundationExtension is common Foundation/UIKit/Cocoa shortcuts and snippets collection.
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This document describes the basic concept of functional tools: Map/Filter/Reduce
FoundationExtension adds small functional programming tools, called Map, Filter and Reduce. These are useful when used with array.
In short:
If you are not familliar with this concept, see python document below - because I referenced it too:
http://docs.python.org/2/tutorial/datastructures.html#functional-programming-tools
If you are playing with array,
If you are playing with enumerator,
About files,