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Connection pooling options with JDBC: DBCP vs C3P0
...a shelf, the Apache Commons folk have taken DBCP out of dormancy and it is now, once again, an actively developed project. Thus my original post may be out of date.
That being said, I haven't yet experienced this new upgraded library's performance, nor heard of it being de-facto in any recent app ...
Is there a quicker / better way to clear the iPhone Simulator cache than deleting its directory?
...o the Keyboard Shortcut:. (I use command-period)
Click the Add button.
Now, while in your iOS Simulator, you can simply use your new shortcut key to reset.
If the Simulator doesn't appear in the drop down list:
In a Finder window, go to your Applications folder.
Right-click Xcode and choose...
Why were pandas merges in python faster than data.table merges in R in 2012?
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It looks like Wes may have discovered a known issue in data.table when the number of unique strings (levels) is large: 10,000.
Does Rprof() reveal most of the time spent in the call sortedmatch(levels(i[[lc]]), levels(x[[rc]])? This isn't really the join itself (t...
Why are Oracle table/column/index names limited to 30 characters?
...understand that many years ago there would be this kind of limitation, but nowadays surely this limit could easily be increased. We have naming conventions for objects, but there is always a case that turns up where we hit this limit - especially in naming foreign keys.
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Why does “pip install” inside Python raise a SyntaxError?
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I know for me I had to do this from the command line (not python command line). This was after changing directory to the location of python.exe and then needed to put the file type on pip3. In my case I was after requests for HT...
Difference between volatile and synchronized in Java
...ariables cannot be reordered with each other. The difference is that it is now no longer so easy to reorder normal field accesses around them. Writing to a volatile field has the same memory effect as a monitor release, and reading from a volatile field has the same memory effect as a monitor acquir...
Intel HAXM installation error - This computer does not support Intel Virtualization Technology (VT-x
...yper-V and Windows Hypervisor Platform options and restart your system.
Now, you can Start HAXM installation without any error.
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jsonify a SQLAlchemy result set in Flask [duplicate]
... """
return [ item.serialize for item in self.many2many]
And now for views I can just do:
return jsonify(json_list=[i.serialize for i in qryresult.all()])
Hope this helps ;)
[Edit 2019]:
In case you have more complex objects or circular references, use a library like marshmallow).
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Why would you use Oracle database? [closed]
...out the cost of developers time working with Oracle. Most developers who know any other db hate Oracle, those that don't assume that all DB code and/or ORM tools are difficult to use.
If I started a business that I believed was going to scale to Amazon proportions I might consider NoSQL solutions,...
How to Implement Custom Table View Section Headers and Footers with Storyboard
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I know this question was for iOS 5, but for the benefit of future readers, note that effective iOS 6 we can now use dequeueReusableHeaderFooterViewWithIdentifier instead of dequeueReusableCellWithIdentifier.
So in viewDidLoad, ...