Two More Billion Dollar Mistakes
Hi,
Du hast bestimmt schon mal mitbekommen, dass null
von seinem Erfinder Tony Hoare als “Billion Dollar Mistake” bezeichnet wird. 2009 entschuldigte er sich auf der QCon öffentlich, dafür dass er 1965 den leichten Weg gegangen ist und null
erfunden hat:
“I call it my billion-dollar mistake. It was the invention of the null reference in 1965. At that time, I was designing the first comprehensive type system for references in an object-oriented language (ALGOL W ). My goal was to ensure that all use of references should be absolutely safe, with checking performed automatically by the compiler. But I couldn’t resist the temptation to put in a null reference, simply because it was so easy to implement. This has led to innumerable errors, vulnerabilities, and system crashes, which have probably caused a billion dollars of pain and damage in the last forty years.”