What should a developer ensure when writing array methods?

When a developer is writing array methods, it is essential to ensure that the arguments are written as a valid Gosu block expression. In Gosu, a block is a chunk of code that can be passed as an argument to a method. By utilizing block expressions, developers can provide more flexible and dynamic behavior for array methods, enhancing their functionality.

For example, a method might require a block that defines how to process each element in the array, allowing for operations like filtering, mapping, or reducing the array based on specific criteria. Writing the arguments as valid Gosu block expressions provides clear and concise ways to manipulate the array's contents while also maintaining the language's syntax and semantics properly.

Options that suggest using only primitive data types or requiring all arguments to be string literals would limit the capability and flexibility of the methods, reducing their usability in more complex scenarios. In addition, the idea that methods should be defined in separate modules focuses on organizational practices rather than the specific requirements for writing array methods themselves, making it less pertinent to the question.