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C/C++ NaN constant (literal)?
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In C, NAN is declared in <math.h>.
In C++, std::numeric_limits<double>::quiet_NaN() is declared in <limits>.
But for checking whether a value is NaN, you can't compare it with another NaN value. Instead use isnan() from <math.h> in C, or std::isnan() from <cmath...
Export from sqlite to csv using shell script
I'm making a shell script to export a sqlite query to a csv file, just like this:
5 Answers
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Find nearest value in numpy array
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edited May 15 '18 at 10:57
answered Apr 2 '10 at 12:01
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How to create a function in a cshtml template?
...nction that is only necessary inside one cshtml file. You can think of my situation as ASP.NET page methods, which are min web services implemented in a page, because they're scoped to one page. I know about HTML helpers (extension methods), but my function is just needed in one cshtml file. I don't...
Is it possible to register a http+domain-based URL Scheme for iPhone apps, like YouTube and Maps?
...ike to have iOS to open URLs from my domain (e.g. http://martijnthe.nl ) with my app whenever the app is installed on the phone, and with Mobile Safari in case it is not.
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How do I edit an existing tag message in git?
We have several annotated tags in our git repository. The older tags have bogus messages that we would like to update to be in our new style.
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Examples of GoF Design Patterns in Java's core libraries
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You can find an overview of a lot of design patterns in Wikipedia. It also mentions which patterns are mentioned by GoF. I'll sum them up here and try to assign as many pattern implementations as possible, found in both the Java SE and Java EE APIs.
Creational patterns
Abstract factory (rec...
Rails 3 check if attribute changed
...available on all models by default). The documentation is really good, but it lets you do things such as:
@user.street1_changed? # => true/false
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How to initialize log4j properly?
...og4j.properties or log4j.xml on the classpath.
You can control which file it uses to initialize itself by setting system properties as described here (Look for the "Default Initialization Procedure" section).
For example:
java -Dlog4j.configuration=customName ....
Will cause log4j to look for ...
Get list of passed arguments in Windows batch script (.bat)
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dancavallaro has it right, %* for all command line parameters (excluding the script name itself). You might also find these useful:
%0 - the command used to call the batch file (could be foo, ..\foo, c:\bats\foo.bat, etc.)
%1 is the first co...