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 1 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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