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Learn Red ? Fundamentals of Red
book

Learn Red ? Fundamentals of Red

by Ivo Balbaert
May 2018
Beginner content levelBeginner
252 pages
6h 19m
English
Packt Publishing
Content preview from Learn Red ? Fundamentals of Red

Using reflection on functions

Functions are first-class objects in Red. You can give your own functions, or even built-in ones, another name, as shown here:

;-- see Chapter06/reflection-functions.red:pr: :print           ;== make native! [[pr ["Hello" "Red"]   ;== Hello Red

The : prevents the function from executing; pr: get 'print does the same thing.

This shows Red's flexibility and power; not only changing the name, but even changing the meaning of built-in words is possible. As always, with great power comes great responsibility. Use these and the other metaprogramming features to come sparely, and above all, wisely!  

Functions can contain other functions that are local to that function and that can access all its variables.

A function can also ...

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Publisher Resources

ISBN: 9781789130706Supplemental Content