backport | 易学教程

“Backporting” nullptr to C++-pre-C++0x programs

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问题 More or less what the title suggests. While I'm not yet using C++0x I'd like to be prepared for when it happens, and I'd also like to reduce the amount of code I have to rewrite to use some of its facilities. That way I can get backwards and forwards compatibility in one go. One of the most interesting ones I have found is nullptr, which I've been using more often recently. After checking the "Official workaround" and Meyer's suggestion, I decided that I'd like to use this in both my C++ and

How do I return to an older version of our code in Subversion?

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I'm working on a project with a friend and I want to return to an older version of our code and set it to be the current. How do I do it? I'm using "anksvn" on vs08. I have the version that I want on my PC, but the commit is failing; The message that I get is "commit is failed, file or directory is out of date." I also have the subversion client on my PC. Jon Skeet Basically you need to "merge backwards" - apply a diff between the current and previous version to the current version (so you end up with a working copy looking like the old version) and then commit again. So for example to go from

python 2.7 functools_lru_cache does not import although installed

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问题 When I try to import matplotlib I get an error Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python2.7/dist-packages/matplotlib/__init__.py", line 128, in <module> from matplotlib.rcsetup import defaultParams, validate_backend, cycler File "/usr/local/lib/python2.7/dist-packages/matplotlib/rcsetup.py", line 29, in <module> from matplotlib.fontconfig_pattern import parse_fontconfig_pattern File "/usr/local/lib/python2.7/dist-packages/matplotlib

How do I return to an older version of our code in Subversion?

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问题 I\'m working on a project with a friend and I want to return to an older version of our code and set it to be the current. How do I do it? I\'m using \"anksvn\" on vs08. I have the version that I want on my PC, but the commit is failing; The message that I get is \"commit is failed, file or directory is out of date.\" I also have the subversion client on my PC. 回答1: Basically you need to "merge backwards" - apply a diff between the current and previous version to the current version (so you