4 ms·

So how would you represent an absence of a value? In an enum that'd be easy, but there is a semantic difference between an empty string and a null string. Or w

So how would you represent an absence of a value? In an enum that'd be easy, but there is a semantic difference between an empty string and a null string. Or would you propose sending a boolean to indicate null as well as a string in a data type?

paulddraper 9y ago
See the Option/Maybe pattern, which uses sum types rather than unions or sentinel values. https://www.lucidchart.com/techblog/2015/08/31/the-worst-mistake-of-computer-science/ https://www.lucidchart.com/techblog/2015/08/31/the-worst-mis...