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std::unique_lock or std::lock_guard?
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The difference is that you can lock and unlock a std::unique_lock. std::lock_guard will be locked only once on construction and unlocked on destruction.
So for use case B you definitely need a std::unique_lock for the condition variable. In case A it depends ...
How to refer to relative paths of resources when working with a code repository
We are working with a code repository which is deployed to both Windows and Linux - sometimes in different directories. How should one of the modules inside the project refer to one of the non-Python resources in the project (CSV files, etc.)?
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How to request a random row in SQL?
How can I request a random row (or as close to truly random as is possible) in pure SQL?
28 Answers
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Never seen before C++ for loop
... unusual constructs weren't considered the most readable solution possible and may therefore be frowned-upon by some.
– Bill K
Jul 31 '12 at 19:50
2
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How do I set the time zone of MySQL?
...at +02:00 is an offset. Europe/Berlin is a timezone (that has two offsets) and CEST is a clock time that corresponds to a specific offset.
@@session.time_zone variable
SELECT @@session.time_zone;
To set it use either one:
SET time_zone = 'Europe/Helsinki';
SET time_zone = "+00:00";
SET @@sessio...
Android: ProgressDialog.show() crashes with getApplicationContext
...e you using? If I'm right about what the problem is then this was fixed in Android 1.6 (API version 4).
It looks like the object reference that getApplicationContext() is returning just points to null. I think you're having a problem similar to one I had in that some of the code in the onCreate() i...
How to get the current directory of the cmdlet being executed
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The reliable way to do this is just like you showed $MyInvocation.MyCommand.Path.
Using relative paths will be based on $pwd, in PowerShell, the current directory for an application, or the current working directory for a .NET API.
PowerShell v3+:
Use the automatic variable $PSScriptRoot.
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“The given path's format is not supported.”
...All Blond put using System.IO; above, then clear str_uploadpath + fileName and write Path.Combine(str_uploadpath, fileName)
– user586399
Sep 8 '11 at 13:35
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Why does Java have transient fields?
...ct.
For example, you may have fields that are derived from other fields, and should only be done so programmatically, rather than having the state be persisted via serialization.
Here's a GalleryImage class which contains an image and a thumbnail derived from the image:
class GalleryImage imple...
Test if remote TCP port is open from a shell script
I'm looking for a quick and simple method for properly testing if a given TCP port is open on a remote server, from inside a Shell script.
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