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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

insert

To add a new item into the series itself, use insert, which inserts the item at the current index (as you know, this is given by index? and can be changed by at). For a newly defined series, insert will occur at the start of the series:

s: [10 11 12]  ;== [10 11 12]insert s 13    ;== [10 11 12]s              ;== [13 10 11 12]

Here, you can see that insert returns the series after the insertion. But insert changes the series s as well so that you don't have to use s: insert s 13

To specify the insert position, use at:

s: [10 11 12]      ;== [10 11 12]insert at s 2 13   ;== [11 12]s                  ;== [10 13 11 12]

The insert word has the same refinements as append.

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Publisher Resources

ISBN: 9781789130706Supplemental Content