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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

Creating objects

The first way to create an object is to use make on the base object! datatype. Let's create a square1 object with a length value and a display function, as follows:

square1: make object! [    length: 10    display: does [ print ["Length of square1 is" length] ]]   ;== make object! [ ... ]

Secondly, instead of make object!, you can use the shorter object or context.

To check whether a word refers to an object, use object?:

object? square1     ;== trueser: [2 7 42 108]object? ser         ;== false
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Publisher Resources

ISBN: 9781789130706Supplemental Content