The error message “return arrays must be of arraytype” usually occurs when you are trying to return a value that is not of array type, but the function expects an array as the return type.
Here is an example to illustrate this error:
function getNumbers() {
return 123;
}
var result = getNumbers();
console.log(result);
In this example, the getNumbers function is expected to return an array, but it instead returns the number 123. This causes the “return arrays must be of arraytype” error to occur.
To fix this error, you need to ensure that the function returns an array type. Here is an updated example:
function getNumbers() {
return [1, 2, 3];
}
var result = getNumbers();
console.log(result); // Output: [1, 2, 3]
In this updated example, the getNumbers function now returns an array [1, 2, 3], which ensures that the returned value is of array type and eliminates the error.