Chapter 9. Metaprogramming
In the previous chapter, you learned about the structure and features of an environment and also learned how to create and access an environment. Environment plays an important role in lazy evaluation, copy-on-modify, and lexical scoping, which are enabled by the environments associated with a function when it is created and called.
Now that we have a solid understanding of how functions work, we will go further in this chapter by learning to work with functions in more advanced forms. You will learn the metaprogramming facilities that make R flexible in interactive analysis. More specifically, we will cover the following topics in this chapter:
- Functional programming: closures and higher-order functions
- Computing on language ...
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