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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

Working with words

In this section, we dive deeper into how Red uses words.

This section goes into the very essence of Red, but its depth and subtlety can overwhelm you. Don't worry if this happens. It is not essential knowledge at this time, and you can safely come back to it later.

Prefixing a word with an apostrophe ('), such as 'b, treats the word literally. The value of 'b is the word b itself, b is not evaluated and is treated as a symbol; the type of 'b is lit-word!:

;-- see Chapter03/bindings.red:b: [1 2 3]'b ;== btype? 'b ;== word!

Why then does type? 'b give word! as a return value? This is because type? is a function (as are get and set , which we'll cover next), a function evaluates its argument(s), and the evaluation of 'b

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Publisher Resources

ISBN: 9781789130706Supplemental Content