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p vs puts in Ruby
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answered Aug 10 '09 at 14:52
sepp2ksepp2k
331k4747 gold badges636636 silver badges653653 bronze badges
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Java, Classpath, Classloading => Multiple Versions of the same jar/project
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answered May 24 '11 at 9:07
Luca PutzuLuca Putzu
1,3881717 silver badges2424 bronze badges
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Generating v5 UUID. What is name and namespace?
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110
Name and namespace can be used to create a hierarchy of (very probably) unique UUIDs.
Roughly s...
count the frequency that a value occurs in a dataframe column
...['freq'] = df.groupby('a')['a'].transform('count')
df
Out[41]:
a freq
0 a 2
1 b 3
2 s 2
3 s 2
4 b 3
5 a 2
6 b 3
[7 rows x 2 columns]
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How to properly overload the
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answered Jan 24 '09 at 16:37
Mehrdad AfshariMehrdad Afshari
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Why does int num = Integer.getInteger(“123”) throw NullPointerException?
... of the Puzzlers: Schlock and Awe (TS-5186), Josh Bloch and Neal Gafter's 2009 JavaOne Technical Session presentation. Here's the concluding slide:
The Moral
Strange and terrible methods lurk in libraries
Some have innocuous sounding names
If your code misbehaves
Mak...
Error handling principles for Node.js + Express.js applications?
...t(err);
});
Middleware syntax is valid in a get request.
As for D)
(07:26:37 PM) tjholowaychuk: app.error is removed in 3.x
TJ just confirmed that app.error is deprecated in favor of E
E)
app.use(function(err, req, res, next) {
// Only handle `next(err)` calls
});
Any middleware that ...
Chrome extension: accessing localStorage in content script
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Update 2016:
Google Chrome released the storage API: http://developer.chrome.com/extensions/storage.html
It is pretty easy to use like the other Chrome APIs and you can use it from any page context within Chrome.
// Save it using...
Declaration/definition of variables locations in ObjectiveC?
...properties can be declared.
Before "modern" Objective-C (in "old" Obj-C 2.0) you didn't have a lot of choices. Instance variables used to be declared in the header between the curly brackets { }:
// MyClass.h
@interface MyClass : NSObject {
int myVar;
}
@end
You were able to access these var...