On Monday, 15 August 2022 at 03:19:43 UTC, johntp wrote:
Your solution worked. I guess it is a little unnatural to ignore the color. I tried overriding the toHash() of Point, but I don't know enough D to get it to work. I wonder if that could be a solution.
Depends on what you're trying to do. Metadata unrelated to the value of the object i would ignore and not be part of hashing or comparisons. I've also done things for strings that held information like what original position in the array the data was (*for visually sorting testing*) and could yield me information while not interfering with the object/data in question.
Though x+y as a hash seems terrible. I'd probably do ((x+1000)**2)+y (assuming x and y are both going to be generally small ensuring the hash for location is unique. Then point(2,1) and point(1,2) have different hashes. But I'm not familiar with the exercise in question.
