Fix 'cannot range over X' by dereferencing pointers or converting the value to a slice, array, map, or string.
The error occurs because you are trying to iterate over a type that is not a slice, array, map, or string. You must convert the value to a slice or array before using a range loop.
// If X is a pointer to a slice, dereference it
for _, v := range *X {
// use v
}
// If X is a custom type, convert it to a slice
for _, v := range X.Slice() {
// use v
}
The "cannot range over X (type Y)" error means you are trying to loop over something that isn't a list or collection. Think of it like trying to count the pages in a single book cover instead of the book itself. You need to unwrap the pointer or convert the value into a list format first.