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Counting null and non-null values in a single query
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This works for Oracle and SQL Server (you might be able to get it to work on another RDBMS):
select sum(case when a is null then 1 else 0 end) count_nulls
, count(a) count_not_nulls
from us;
Or:
select count(*) - count(a)...
Compiling with g++ using multiple cores
Quick question: what is the compiler flag to allow g++ to spawn multiple instances of itself in order to compile large projects quicker (for example 4 source files at a time for a multi-core CPU)?
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How to open a web page from my application?
I want to make my WPF application open the default browser and go to a certain web page. How do I do that?
9 Answers
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Why is spawning threads in Java EE container discouraged?
...'t spawn my own threads inside a Java EE container. But when I come to think about it, I don't know the reason.
9 Answers
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How to define a function in ghci across multiple lines?
... trying to define any simple function that spans multiple lines in ghci, take the following as an example:
7 Answers
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Gradle: Execution failed for task ':processDebugManifest'
...gradle assemble -info gave me the hint that the Manifests have different SDK Versions and cannot be merged.
I needed to edit my Manifests and build.gradle file and everything worked again.
To be clear you need to edit the uses-sdk in the AndroidManifest.xml
<uses-sdk android:minSdkVersion="...
Why doesn't Java allow to throw a checked exception from static initialization block?
Why doesn't Java allow to throw a checked exception from a static initialization block? What was the reason behind this design decision?
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String Resource new line /n not possible?
It doesn't seem like it's possible to add a new line /n to an XML resource string. Is there another way of doing this?
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How do you search for files containing DOS line endings (CRLF) with grep on Linux?
...rch for files containing DOS line endings with grep on Linux. Something like this:
9 Answers
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apc vs eaccelerator vs xcache
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David Snabel-CauntDavid Snabel-Caunt
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