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<p>Arrays are a fundamental datatype in Janet. Arrays are values that contain a
sequence of other values, indexed from 0. Arrays are also mutable, meaning that
values can be added or removed in place. Many functions in the Janet core
library will also create arrays, such as <code class="mendoza-code">map</code>, <code class="mendoza-code">filter</code>, and
<code class="mendoza-code"