👉 An arrayer is a type of machine that can perform operations on arrays. These machines are commonly used in computer science and data analysis to process large datasets. They work by dividing an input into smaller, more manageable parts called "subarrays," which they then concatenate together using a special operator known as the "concatenation" operation. This allows them to efficiently manipulate and analyze arrays of any size, making them useful for tasks such as sorting, searching, and filtering data.