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Re:John Carmack: “I just dumped the C++ server I wrote for a... by staunch on Tuesday March 17, 2015 @09:35PM (#9223025)
Carmack is constantly challenging himself. A trait common among masters. Louis CK is so good at comedy because he throws away all his material each year. Carmack used to practically write a new game engine every year. Now he's doing even more challenging work than that.
Re:John Carmack: “I just dumped the C++ server I wrote for a... by sz4kerto on Tuesday March 17, 2015 @11:59PM (#9223515)
Arthur Whitney, author of A+,k and kdb/q always starts from scratch when he develops a new version of his db. From scratch means throwing away even the lowest-level routines like basic string operations and low-level file i/o.
Re:John Carmack: “I just dumped the C++ server I wrote for a... by swah on Wednesday March 18, 2015 @07:42AM (#9224773)
And the source code is bizarre but... works for him.
Re:John Carmack: “I just dumped the C++ server I wrote for a... by evincarofautumn on Tuesday March 17, 2015 @11:39PM (#9223468)
If what you do over and over again is throw away your work with the goal of writing a better thing, then you can get really good at writing new things. It’s a clever way to think about practice.
Re:John Carmack: “I just dumped the C++ server I wrote for a... by agmcleod on Tuesday March 17, 2015 @11:38PM (#9223461)
Man i'd love to do that. Explore game dev with different languages. Try and code a fresh web game engine purely using webgl. Naturally i get busy with other things :)
Re:John Carmack: “I just dumped the C++ server I wrote for a... by astrodust on Wednesday March 18, 2015 @02:13PM (#9227500)
He's certainly not afraid to leave his comfort zone and try something completely tangental, like making rockets or working with VR hardware.

He's always been humble, engaging, friendly, and most of all, passionate about what he does without becoming fanatical about it.