That's a feature! No seriously. Among an august audience like HN people might have more discipline to properly grok the code they're copying, but I know of plenty of places where people will just copy and paste disparate chunks of tutorial code into their editor then start randomly changing lines and variables (with a hundred questions demanded of the poor folks in some irc channel) until it sort-of-but-not-quite works. Forcing people to write it from scratch, having had the construction demonstrated, seems to aid the mental digestion of the code much better. That's just my anecdotal experience anyway.
That's a feature! No seriously. Among an august audience like HN people might have more discipline to properly grok the code they're copying, but I know of plenty of places where people will just copy and paste disparate chunks of tutorial code into their editor then start randomly changing lines and variables (with a hundred questions demanded of the poor folks in some irc channel) until it sort-of-but-not-quite works. Forcing people to write it from scratch, having had the construction demonstrated, seems to aid the mental digestion of the code much better. That's just my anecdotal experience anyway.