Course of Raku / Functional, concurrent, reactive, and web programming / Functional programming
Iterators
The previous section built sequences with gather and
take. This one goes one level down, to the mechanism that
actually delivers the values: the iterator.
An iterator is the small object behind every list, range, and lazy
sequence in Raku. It knows how to do one thing — produce the
next value — and nothing more. Whenever you write a
for loop or call map, Raku quietly asks an
iterator for one value at a time until there are none left. This section
shows that protocol directly: how to pull values from an iterator by
hand, and how to write an iterator of your own.
Topics in this section
Practice
Complete the quiz that covers the contents of this section.
Exercises
This section contains 1 exercise. Examine all the topics of this section before doing the coding practice.
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