Unfortunately empty slices are pretty useful, particularly for strings. For example, if you want to represent HTTP response headers, you might include a bunch o

Unfortunately empty slices are pretty useful, particularly for strings. For example, if you want to represent HTTP response headers, you might include a bunch of nigh-ubiquitous headers in a struct and punt the others to a hash table, and you would then have to represent both empty-valued-and-present headers and missing headers for those headers you placed in the struct.