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What? No! Python 2 is only 17 years old. I can still run Java, C, C++ and Perl 5 (picking the first 4 languages that occur) that were written before then, with

What? No! Python 2 is only 17 years old. I can still run Java, C, C++ and Perl 5 (picking the first 4 languages that occur) that were written before then, with no problems.

xapata 9y ago
Which version? Aren't we on Java 9 now?
- qznc 9y ago
  That is actually Java 1.9. They decided to kind of hide the leading "1." at Java 1.5. https://en.wikipedia.org/wiki/Java_version_history#Versioning_change https://en.wikipedia.org/wiki/Java_version_history#Versionin...
  - shagie 9y ago
    That was part of Sun's "people pay more attention to the first number" reversioning. Solaris 2.6 was followed by Solaris 7. This was partly because of the competitors (e.g. IRIX) were raving the first digit with each major version. When Solaris was version 2.6, IRIX was version 6. As I recall it, Management had less confidence with things called "1.X" or "2.X" than things called "5.Y". So, Sun went through and started dropping the small leading digit from the versions of their products.
- CJefferson 9y ago
  I can still run java 1.2 code fine (I say 1.2 as I have a bunch of 1.2 code).
jhasse 9y ago
Most C++ code wont compile for multiple reasons. For example using namespace std will result in errors if your code calls a function which is now part of std.
- throwaway613834 9y ago
  But you can get rid of compile errors pretty easily. Pretty darn different from Python where you have to run the code to find issues.
- CJefferson 9y ago
  "most" is a great exaggeration. Yes, I few more names have been added. Also, it was always known adding namespace STD could cause problems. The same issues arise with import * in python.
  - jhasse 9y ago
    That was just one example though. In my experience getting old C++ code to compile and run isn't so easy.
- user5994461 9y ago
  I actually think that migrating from Qt4 to Qt5 has a lot of similarity with python 2 to python 3. Not sure why there aren't more people doing the comparison.
  - freeone3000 9y ago
    pyqt is a robust enough wrapper to avoid the migration issues, so in a python thread you won't have anybody who suffered through that mess.
    - user5994461 9y ago
      I am not talking about pyqt or python code, I mean pure C++ projects using Qt. The transition from 4 to 5 had some hiccups.

What? No! Python 2 is only 17 years old. I can still run Java, C, C++ and Perl 5 (picking the first 4 languages that occur) that were written before then, with no problems.

xapata 9y ago

Which version? Aren't we on Java 9 now?

qznc 9y ago
That is actually Java 1.9. They decided to kind of hide the leading "1." at Java 1.5. https://en.wikipedia.org/wiki/Java_version_history#Versioning_change https://en.wikipedia.org/wiki/Java_version_history#Versionin...
- shagie 9y ago
  That was part of Sun's "people pay more attention to the first number" reversioning. Solaris 2.6 was followed by Solaris 7. This was partly because of the competitors (e.g. IRIX) were raving the first digit with each major version. When Solaris was version 2.6, IRIX was version 6. As I recall it, Management had less confidence with things called "1.X" or "2.X" than things called "5.Y". So, Sun went through and started dropping the small leading digit from the versions of their products.
CJefferson 9y ago
I can still run java 1.2 code fine (I say 1.2 as I have a bunch of 1.2 code).

jhasse 9y ago

Most C++ code wont compile for multiple reasons. For example using namespace std will result in errors if your code calls a function which is now part of std.

throwaway613834 9y ago
But you can get rid of compile errors pretty easily. Pretty darn different from Python where you have to run the code to find issues.
CJefferson 9y ago
"most" is a great exaggeration. Yes, I few more names have been added. Also, it was always known adding namespace STD could cause problems. The same issues arise with import * in python.
- jhasse 9y ago
  That was just one example though. In my experience getting old C++ code to compile and run isn't so easy.
user5994461 9y ago
I actually think that migrating from Qt4 to Qt5 has a lot of similarity with python 2 to python 3. Not sure why there aren't more people doing the comparison.
- freeone3000 9y ago
  pyqt is a robust enough wrapper to avoid the migration issues, so in a python thread you won't have anybody who suffered through that mess.
  - user5994461 9y ago
    I am not talking about pyqt or python code, I mean pure C++ projects using Qt. The transition from 4 to 5 had some hiccups.