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实战做项目如何选择开源许可协议（一）-了解协议 - 开源 & Github - 清泛网...
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常见的开源许可协议有：GPL、LGPL、BSD、Apache Licence vesion 2.0、MIT。这些协议有什么区别呢？
GPL，全称 GNU General Public License。它的主要内容为：只要在一个软件中使用(“使用”指类库引用或者修改后的代码) GPL 协议的产品，则...
pandas GroupBy columns with NaN (missing) values
....1.0.dev0+2004.g8d10bfb6f'
# Example from the docs
df
a b c
0 1 2.0 3
1 1 NaN 4
2 2 1.0 3
3 1 2.0 2
# without NA (the default)
df.groupby('b').sum()
a c
b
1.0 2 3
2.0 2 5
# with NA
df.groupby('b', dropna=False).sum()
a c
b
1.0 2 3
2.0 2 5...
What does 'stale file handle' in Linux mean?
Say I have a terminal open, and through that terminal I have cd 'ed to some directory. Through another terminal, I delete that directory and restore it back from an identical backup. When I try to vim a file from the first terminal, in the same directory, why do I get an error about a stale file ...
JPA CascadeType.ALL does not delete orphans
...ments
delete all child elements
delete main row
close session
With JPA 2.0, you can now use the option orphanRemoval = true
@OneToMany(mappedBy="foo", orphanRemoval=true)
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improve this ...
Add 10 seconds to a Date
...onds" and the most voted answer is wrong.
– Philipp Gächter
Jun 23 '14 at 7:32
2
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Remove all elements contained in another array
...ound it, just awesome. Thank you very much!
– Tarvo Mäesepp
Sep 1 '19 at 18:58
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Format SQL in SQL Server Management Studio
... @Jordan: in Windows 10 the .Net Framework 3.5 SP1 (including .Net 2.0) is an optional feature of windows, that can be enabled in the "Turn Windows features on or off" screen/functionality. It's called ".NET Framework 3.5 (includes .NET 2.0 and 3.0)", and it's right at the top of the list of...
What is bootstrapping?
I keep seeing "bootstrapping" mentioned in discussions of application development. It seems both widespread and important, but I've yet to come across even a poor explanation of what bootstrapping actually is; rather, it seems as though everyone is just supposed to know what it means. I don't, tho...
Sort a list by multiple attributes?
... return r #keep looping till you see a difference
return r
Lst = [(4, 2.0), (4, 0.01), (4, 0.9), (4, 0.999),(4, 0.2), (1, 2.0), (1, 0.01), (1, 0.9), (1, 0.999), (1, 0.2) ]
Lst.sort(lambda x,y:multi_attribute_sort(x,y)) #The Lambda of the Lambda
for rec in Lst: print str(rec)
Here's a way to r...
Can I keep Nuget on the jQuery 1.9.x/1.x path (instead of upgrading to 2.x)?
...the config change, an update should not upgrade your jQuery package to the 2.0 release. There have been issues in the past with the UI package manager not respecting the allowedVersions attribute (https://nuget.codeplex.com/workitem/1891), so you may have to use the command line if you encounter thi...