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Why should you remove unnecessary C# using directives?
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Code cleanliness is important.
One starts to get the feeling that the code may be unmaintained and on the browfield path when one sees superfluous usings. In essence, when I see some unused using statements, a little yellow flag goes up in the back of my b...
Is it good practice to use java.lang.String.intern()?
...y reference (== is faster than equals)
Are there side effects not mentioned in the Javadoc?
The primary disadvantage is that you have to remember to make sure that you actually do intern() all of the strings that you're going to compare. It's easy to forget to intern() all strings and then you...
Overlaying histograms with ggplot2 in R
...ill = utt)) + geom_histogram(alpha = 0.2)
is telling ggplot to construct one histogram using all the values in f0 and then color the bars of this single histogram according to the variable utt.
What you want instead is to create three separate histograms, with alpha blending so that they are visi...
How does the Amazon Recommendation feature work?
...nity analysis) which is a subset of the field of data mining. Typical components in such a system include identification of primary driver items and the identification of affinity items (accessory upsell, cross sell).
Keep in mind the data sources they have to mine...
Purchased shopping ca...
Indenting code in Sublime text 2?
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Having done nothing, it suddenly started working. :) I guess the problem was between the keyboard and the chair all along :) Thank you anyway. :)
– Nuno Gonçalves
Dec 13 '12 at 14:27
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Hidden Features of VB.NET?
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Custom Enums
One of the real hidden features of VB is the completionlist XML documentation tag that can be used to create own Enum-like types with extended functionality. This feature doesn't work in C#, though.
One example from a recent...
How to detect if a script is being sourced
...that holds a stack trace of sources, where ${BASH_SOURCE[0]} is the latest one. The braces are used here to tell the bash what is part of the variable name. They are not necessary for $0 in this case, but they do not hurt either. ;)
– Konrad
Jan 22 '16 at 17:23...
Postgresql - change the size of a varchar column to lower length
...e ALTER TABLE command on a really large table (almost 30 millions rows).
One of its columns is a varchar(255) and I would like to resize it to a varchar(40) .
Basically, I would like to change my column by running the following command:
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Need to handle uncaught exception and send log file
... getDefaultUncaughtExceptionHandler, just pass the call to it when you're done.
– gilm
Mar 3 '14 at 14:02
2
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iPhone app in landscape mode, 2008 systems
...ll-known problem at hand here: if you are trying to swap between MORE THAN ONE view (all landscape), IT SIMPLY DOES NOT WORK. It is essential to remember this or you will waste days on the problem. It is literally NOT POSSIBLE. It is the biggest open, known, bug on the iOS platform. There is litera...