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Pointers vs. values in parameters and return values
...eful use of pointers to items, items are small enough to copy efficiently, etc.). Sometimes you have to think about or measure the specifics of your situation, but that's a rough guide.
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matplotlib does not show my drawings although I call pyplot.show()
...ed all the different backends that people on the web suggest (Qt4Agg, GTK, etc.), and they all failed (i.e. when I tried to import matplotlib.pyplot, I get ImportError because it's trying to import some dependency that's missing). I then researched how to install those dependencies, but it just mad...
What is the dual table in Oracle?
... as sysdate. Also helps you to check if Oracle is up and check sql syntax, etc.
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How to read environment variables in Scala
...ct to compile Scala to other platforms than JVM (.NET, javascript, native, etc.) Reducing the dependencies on Java API, will make your code more portable.
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iOS - forward all touches through a view
...iew to stop the behavior of other views underneath, which are scrollviews, etc. How can I forward all the touches through this overlay view? It is a subcalss of UIView.
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How to create composite primary key in SQL Server 2008
...me of your PK, e.g. PK_TableName] PRIMARY KEY CLUSTERED (column1, column2, etc.)
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How to perform Callbacks in Objective-C
...re usually used to show Downloading many images from server asynchronously etc.
NSNotifications : NotificationCenter is one of features of Objective C which used to notify many receiptants at time when event occur.
Blocks : Blocks are more commonly used in Objective C programming. It is great featur...
How to fix 'sudo: no tty present and no askpass program specified' error?
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Consider adding a file to /etc/sudoers.d and leaving the visudo file untouched.
– xlttj
Mar 1 '17 at 9:58
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Difference between Math.Floor() and Math.Truncate()
...g.AwayFromZero) == -1 Math.Round(0.3, MidpointRounding.AwayFromZero)==0.0 etc..
– dtroy
May 5 '09 at 3:49
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In Python, how do I create a string of n characters in one line of code?
...(ord('a')+i) for i in xrange(10)) (the first ten lowercase letters again), etc, etc;-).
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