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Best way to create custom config options for my Rails app?
...t mention the 'x', but I can attest that it is still necessary as of Rails 5.0
– Don
Jul 29 '16 at 20:34
You're right ...
Is it possible to have SSL certificate for IP address, not domain name?
...onfiguration. Turned out, Chrome browser (39.0.2171.93) on Android OS (4.4,5.0; works on 4.0,4 ) doesn't play audio files via HTTPS if IP address is used as certificate target. We used to use such configuration for our test environment, but will start using domain names.
– ENar...
What is the maximum length of data I can put in a BLOB column in MySQL?
...rs from interpreting the MySQL manual, per http://dev.mysql.com/doc/refman/5.0/en/storage-requirements.html
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Detecting iOS / Android Operating system
...
Not working iPAD Pro: return this: Safari: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0 Safari/605.1.15
– Ivan Ferrer
Jun 9 at 18:24
...
Converting numpy dtypes to native python types
...d_np_array), listed_np_array)
<class 'list'> [[1.0, 2.0, 3.0], [4.0, 5.0, 6.0]]
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How do I compute derivative using Numpy?
...the derivative in a single point, the formula would be something like
x = 5.0
eps = numpy.sqrt(numpy.finfo(float).eps) * (1.0 + x)
print (p(x + eps) - p(x - eps)) / (2.0 * eps * x)
if you have an array x of abscissae with a corresponding array y of function values, you can comput approximations o...
MySQL “Group By” and “Order By”
...o do this at the very bottom of this link. http://dev.mysql.com/doc/refman/5.0/en/group-by-hidden-columns.html
If you can get am insert/update event (like a trigger) to pre-compute the concatenation of the fields you can index it and the query will be as fast as if the group by was over just the fi...
创业第一年 太特么累了 - 资讯 - 清泛网 - 专注C/C++及内核技术
...流畅，但后来发现有的手机特别卡，试了半天总结出安卓5.0以上都这毛病，找原因吧。。。呵呵，到现在也没找到！技术总监已咬碎牙准备换框架了。还有与外包团队的对接和功能整合，绝对是件麻烦事，有时觉得应该都明白就...
Unsupported major.minor version 52.0 [duplicate]
...= 54
Java SE 9 = 53
Java SE 8 = 52
Java SE 7 = 51
Java SE 6.0 = 50
Java SE 5.0 = 49
JDK 1.4 = 48
JDK 1.3 = 47
JDK 1.2 = 46
JDK 1.1 = 45
These are the assigned major numbers. The error regarding the unsupported major.minor version is because during compile time you are using a higher JDK and a lower...
ERROR: Error installing capybara-webkit:
...G: The next major version of capybara-webkit will require at least version 5.0 of Qt. You're using version 4.8.6.
Instead, if you do
brew install qt5
brew link --force qt5
you won't get that error.
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