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Is Meyers' implementation of the Singleton pattern thread safe?
...the variable is being initialized, the concurrent execution shall wait for completion of the initialization.
GCC and VS support for the feature (Dynamic Initialization and Destruction with Concurrency, also known as Magic Statics on MSDN) is as follows:
Visual Studio: supported since Visual Stud...
PostgreSQL Crosstab Query
... CASE and GROUP BY
\crosstabview in psql
Postgres 9.6 added this meta-command to its default interactive terminal psql. You can run the query you would use as first crosstab() parameter and feed it to \crosstabview (immediately or in the next step). Like:
db=> SELECT section, status, ct FRO...
module.exports vs exports in Node.js
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edited Jun 20 at 9:12
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answered Aug 22 '11 at 3:38
LimeLime
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What's the difference between django OneToOneField and ForeignKey?
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Mocking member variables of a class using Mockito
... way of accessing the member variables so you can pass in a mock (the most common ways would be a setter method or a constructor which takes a parameter).
If your code doesn't provide a way of doing this, it's incorrectly factored for TDD (Test Driven Development).
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How to prune local tracking branches that do not exist on remote anymore
... branch name. Finally passing all the branch names into the delete branch command.
Since it is using the -d option, it will not delete branches that have not been merged into the branch that you are on when you run this command.
Also remember that you'll need to run git fetch --prune first, otherwi...
What goes into your .gitignore if you're using CocoaPods?
...y reasoning is something like:
The Podfile refers to a specific tag or or commit of each dependency so the Pods themselves can be generated from the podfile, ergo they are more like an intermediate build product than a source and, hence, don't need version control in my project.
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What is the use of the ArraySegment class?
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ArraySegment<T> has become a lot more useful in .NET 4.5+ and .NET Core as it now implements:
IList<T>
ICollection<T>
IEnumerable<T>
IEnumerable
IReadOnlyList<T>
IReadOnlyCollection<T>
as opposed to the .NET 4 ver...
Is there an advantage to use a Synchronized Method instead of a Synchronized Block?
...r object as lock whereas syncing the method would lock the entire object.
Compare:
// locks the whole object
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private synchronized void someInputRelatedWork() {
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}
private synchronized void someOutputRelatedWork() {
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}
vs.
// Using specific locks
Object inputLock = new Obj...
Get the closest number out of an array
...reducer.bind(null, goal)); ---------- I don't know how to put code in the comments hahaha.
– Mauricio Soares
Jan 22 '16 at 18:12
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