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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

Code is just data – load

Lines of code in Red are just data structures. Let's start with some very basic code, such as an arithmetic expression—for example, 3.14 ** 2 , calculating the square of 3.14, which is 9.8596. You write your code in an editor, so it's basically a string, right?

;-- see Chapter06/code-data.red:calc: "3.14 ** 2"type? calc     ;== string!calc           ;== "3.14 ** 2"

Here, :calc or get 'calc return the same result as calc.

Now we must transform this string expression into something Red can work with—namely, a series in a block. This can be done with the load word, which  loads the string into memory, parses it, and turns it into Red values:

code: load calc    ;== [3.14 ** 2]code               ;== [3.14 ** 2]type? code         ;== block!length? code ;== ...
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Publisher Resources

ISBN: 9781789130706Supplemental Content