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Using LINQ to concatenate strings
...code use String.Join as shown in the other answer
Use aggregate queries like this:
string[] words = { "one", "two", "three" };
var res = words.Aggregate(
"", // start with empty string to handle empty list case.
(current, next) => current + ", " + next);
Console.WriteLine(res);
This out...
Determine if string is in list in JavaScript
In SQL we can see if a string is in a list like so:
14 Answers
14
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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 do I animate constraint changes?
...mportant notes:
You need to call layoutIfNeeded within the animation block. Apple actually recommends you call it once before the animation block to ensure that all pending layout operations have been completed
You need to call it specifically on the parent view (e.g. self.view), not the child ...
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="...
Looking for a 'cmake clean' command to clear up CMake output
Just as make clean deletes all the files that a makefile has produced, I would like to do the same with CMake. All too often I find myself manually going through directories removing files like cmake_install.cmake and CMakeCache.txt , and the CMakeFiles folders.
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