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Check if a string is null or empty in XSLT
...on, in my opinion, of "[not] null or empty" as inferred from the question, including it's pseudo-code and my own early experience with XSLT. I.e., "What is the equivalent of the following Java?":
!(categoryName == null || categoryName.equals(""))
For more details e.g., distinctly identifying null...
Which parts of Real World Haskell are now obsolete or considered bad practice?
...etely.
Missing content
Some topics are not discussed in RWH at all. This includes streaming libraries such as pipes and conduit, and also lenses.
There are several resources out there for those topics, but here are some links to introductions to give you an idea what they're about. Also, if you w...
Java Garbage Collection Log messages
...d after garbage collection, respectively. After minor collections the size includes some objects that are garbage (no longer alive) but that cannot be reclaimed. These objects are either contained in the tenured generation, or referenced from the tenured or permanent generations.
The next numb...
How do I reverse a C++ vector?
...here's a function std::reverse in the algorithm header for this purpose.
#include <vector>
#include <algorithm>
int main() {
std::vector<int> a;
std::reverse(a.begin(), a.end());
return 0;
}
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Dependency injection through constructors or property setters?
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@nkr1pt: Most people (me included) agree that setter injection is bad if it allows you to create a class that fail at runtime if the injection is not done. I believe someone therefore objected to your statement of it being personal taste.
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How to scale down a range of numbers with a known min and max value
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git: abort commit in the middle of typing message
...he commit message editor, and when you save, the commit will be amended to include the additional changes and your new commit message.
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Ant: How to execute a command for each file in directory?
...>
<fileset dir="${server.src}" casesensitive="yes">
<include name="**/*.java"/>
<exclude name="**/*Test*"/>
</fileset>
</foreach>
</target>
<target name="bar">
<echo message="${theFile}"/>
</target>
This will antcall...
Writing to an Excel spreadsheet
..., but I have not used it.
To format cells with xlwt, define a XFStyle and include the style when you write to a sheet. Here is an example with many number formats. See example code below.
Tablib (powerful, intuitive): Tablib is a more powerful yet intuitive library for working with tabular data. It...
How do I alter the position of a column in a PostgreSQL database table?
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