Course of Raku / Functional, concurrent, reactive, and web programming / Functional programming
Generators
A generator is a routine that produces a series of values
one at a time, yielding each on demand instead of building the whole
list up front. Raku spells it with the gather /
take pair: inside a gather block, every
take hands one value to the resulting sequence, and the
block pauses right there until the next value is pulled.
Because the values are produced lazily — only as they are asked for —
a generator can even describe an endless series. This section shows how
to build sequences with gather and take. The
lower-level machinery that actually pulls those values out, one by one,
is the subject of the next section, Iterators.
Topics in this section
Practice
Complete the quiz that covers the contents of this section.
Exercises
This section contains 3 exercises. Examine all the topics of this section before doing the coding practice.