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 1 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.