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- I am a senior software engineer working in industry, teaching and writing on software design, SOLID principles, DDD and TDD.
Location
Buenos Aires
Education
Computer Science Degree at Universidad de Buenos Aires
Thanks:))
I'd add that Hoare is too self-blaming. At the moment he devised NULL, it was good solution. As always, remedy renders into poison only in excessive amounts. What we really needed is strict non-NULL guarantee at compiler level - and, well, this is what is added to much part of newer languages and tools; and, where we are sure any NULL is not allowed, this shall be marked, to allow checking. For God's sake, developer tools are now powerful enough.
The more problem I've faced once is that the whole set of "undefined" and "null" is not enough in some cases. This was a monitoring tool where we had to invent multiple cases as "sensor is absent", "sensor is unreachable" and "sensor is failing". This doesn't fit into traditional approaches with a single special value, but a language which allows algebraic types nicely fit here. Over recent ones, nearly any do (with different efficiency).
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"For every complex problem there is an answer that is clear, simple, and wrong." (c)
This is exactly the case you show here.
Ok. I respect your opinion
Thanks:))
I'd add that Hoare is too self-blaming. At the moment he devised NULL, it was good solution. As always, remedy renders into poison only in excessive amounts. What we really needed is strict non-NULL guarantee at compiler level - and, well, this is what is added to much part of newer languages and tools; and, where we are sure any NULL is not allowed, this shall be marked, to allow checking. For God's sake, developer tools are now powerful enough.
The more problem I've faced once is that the whole set of "undefined" and "null" is not enough in some cases. This was a monitoring tool where we had to invent multiple cases as "sensor is absent", "sensor is unreachable" and "sensor is failing". This doesn't fit into traditional approaches with a single special value, but a language which allows algebraic types nicely fit here. Over recent ones, nearly any do (with different efficiency).